distributor flow chart - mechanical seals - flex-a- · pdf fileboiler feed & condensate...

W h i t e W h i t e N o t e b o o kN o t e b o o k

This book is your sales aid guide. It includes - 1. A distributor/customer flowchart. This chart is designed to

assist you as you talk with the customer to solve their special or problem applications. The chart takes you through four areas crucial to choosing the right seal for the right application.

2. A master list of all the sections. 3. Indexes by industry. These indexes are industry-specific and

will help you pull the correct sections for your presentation. 4. Flow charts by industry. Each chart is designed to give you a

quick, visual overview of that particular industry. 5. Seal recommendations by industry. For some of the more

complex industries we have included seal recommendations by process.

B l u e B l u e N o t e b o o kN o t e b o o k

This book is for your presentation and for your customer to keep. To prepare this notebook, just follow these steps - 1. The first section should always be the “Overview” section which

gives introduction of EFM and the engineers’ biographies. 2. Determine the sections you will need to insert. Refer to the

“Index by Industry” for the appropriate sections. 3. Place your business card in the pocket in the inside front cover

of the notebook. 4. Be sure to include the FAS color brochures in the back pocket of

the notebook!

Flex-A-Seal Inc. 1 Jackson Street Essex Junction VT 05452 www.flexaseal.com

Toll free USA 800-426-3594 Telephone 802-878-8307

Facsimile 802-878-2479

Distributor Flow Chart

FFlexlex--AA--Seal is proud to announce our newest sales tool Seal is proud to announce our newest sales tool -- Engineered Fluid Management. Engineered Fluid Management.

Flex-A– Seal, established in 1983, is internationally regarded as a leader in the fluid sealing industry. Currently, FAS services a multitude of industries and customers in 60 + countries worldwide. This success is a direct result of our engineering focus on long-term cost-effective solutions. Although we may be best known for our bellows welding technology, our product line has expanded to encom-pass a wide variety of seal styles and solutions. Our philosophy is to apply either a bellows or pusher seal when the application warrants, or to design a engineered product if these standard solutions are not suitable. We con-sistently engineer proper solutions for problematic sealing applications. Our unique approach, coupled with an uncompromised commitment to product quality assures our customers of unprecedented sealing reliability. This binder is a resource to address specific sealing applications and conditions in your environment. To comple-ment this information, you will find data sheets, drawings, references, case histories, and a brief biography of our engineers. We have designed this book to be a reference tool for your specific seal needs. Flex–A-Seal also offers an extensive line of ANSI cartridges, simple single spring rubber bellows, and other sealing products for your more common sealing requirements.

Engineered Fluid ManagementEngineered Fluid Management FlexFlex--AA--Seal Seal

Flex-A-Seal (toll free USA) 800-426-3594 1 Jackson Street (telephone) 802-878-8307 Essex Junction VT 05452 (facsimile) 802-878-2479

www.flexaseal.com/engineered_fluid


KKimball Simmonsimball Simmons Kim Simmons, our chief engineer, has over 30 years of seal design experience. He came to Flex-A-Seal with previous, extensive de-sign experience with Sealol and Flexibox. Kim is a member of STLE, FSA, ASTM, and the Seal Technical Committee. Kim holds a Mechanical Engineering degree from the University of Rhode Island.

PPatrick Noelatrick Noel Our applications engineer, Patrick has been with Flex-A-Seal over 11 years. In addition to completing his Mechanical Technologies de-gree from Vermont Technical College, he also completed STLE basic and advanced seal courses in 1993/94 and Georgia Tech’s Fluid Sealing Seminar in 1997. Patrick works closely with customers to determine their sealing needs.

JJeff Kinamaneff Kinaman Jeff has been designing mechanical seals for Flex-A-Seal since 1998. He holds a Mechani-cal Engineering degree from the University of Vermont, has taken STLE and AutoCAD courses. Jeff works on specialized mechani-cal seal designs and our Flex-A-Gard™ prod-uct line.

HHelio Campos Mello Guidaelio Campos Mello Guida Helio began as a distributor for Flex-A-Seal in Brazil in 1993 and became a Flex-A-Seal du Brazil partner in 1996. The Brazilian facility designs as well as manufactures the Flex-A-Seal product line. Helio graduated from Escola de Engenharia Mauá with a degree in Me-chanical Engineering.

Flex-A-Seal (toll free USA) 800-426-3594 1 Jackson Street (telephone) 802-878-8307 Essex Junction VT 05452 www.flexaseal.com/engineered_fluid (facsimile) 802-878-2479

BBurt Ploofurt Ploof Burt joined Flex-A-Seal in 1993 with a Mechanical Technologies degree from Vermont Technical Col-lege. He completed STLE basic and advanced seal courses in 1999. Burt’s engineering focus is on our split cartridge seal and designing replacement components for our competitor seal repair pro-gram.



High Temperature Solutions for

Boiler Feed & Condensate IIn boiler feed applications, special care must be taken to maintain adequate lubri-cation between the seal faces. This lubrication may be negatively im-pacted by a condition called ‘flashing’ or ‘popping’, which occurs when water va-porizes to steam. This process allows the seal faces to open and close rapidly. Flashing causes seal faces to chip, which may allow abrasives onto the sealing face surfaces, accelerating face wear. Flashing will also add to assembly vibration, caus-ing wear to the drive mechanisms and po-tential seal hang--up, leading to seal fail-ure.

OUR SEALING ADVANTAGES Stationary design - allows for better face track-ing, especially at larger surface speeds Multi -point injection - ensures uniform cooling around the entire circumference of the faces Antimony impregnated carbon vs. Silicon carbide - is the best face combination to provide the lowest coefficient of friction, high strength, and high thermal conductivity to assist the re-moval of heat generated at the faces Hydraulically balanced faces - reduce face loading and generated heat Integral pumping ring - uses a tangential, verti-cally located connection to circulate water in the seal chamber to the heat exchanger and back Stationary springs - located outside of product, won’t wear or clog due to solids Positively retained non-sparking bushing - helps to minimize leakage in event of seal failure Dynamic elastomer - slides on the clean surface of the stationary seal ring, eliminating fretting on shafts and sleeves


Multi-point injection directs cooler liquid to seal face area


Hydraulically balanced faces reduce face loading and heat generation

Stationary springs are located out of product to reduce clogging

Integral pumping ring design efficiently circulates water to the heat exchanger

and back around the seal faces

Positively retained non-sparking throttle bushing guards

against pressure blowout in event of seal failure


Boiler Feed & Condensate

Spiral Trac™ Throat bushing aids in removing abrasives

from seal chamber

Rugged Heavy Duty Cartridge Design

CCASE HISTORY FOR BOILER FEED PROCESSASE HISTORY FOR BOILER FEED PROCESS This chemical plant had four water jacketed Ingersoll Rand Vaporizer circulating pumps utilizing a competitor multi-spring cartridge design. They were receiving the extremely poor seal life of one to six weeks. Maintenance on these pumps was averaging $100,000.00/year. We evaluated the situation and provided a high pressure/high temperature cartridge design. This design incorporated a Spiral Trac™ Throat bushing to assist in removing abrasives from the seal chamber. We also mounted the pumping ring directly under a tangentially drilled connection, alle-viating the inaccuracy of using the lantern ring connection. This drill-through in combination with the outlet, matches the pump rotation, greatly enhancing the pumping effect. We also changed the face combination to silicon carbide vs. antimony impregnated carbon to re-duce friction and generate less face heat. Finally, we worked with the customer to establish the correct API Plan 23 piping configuration and supplied them with a high-efficiency heat exchanger. All four pumps have been converted to this design which has saved the customer thousands of dollars in maintenance. The average seal life of our seals in this application has been over two years per seal.

Engineered Fluid ManagementEngineered Fluid Management FlexFlex--AA--SealSeal

Flex-A-Seal (toll free USA) 800-426-3594 1 Jackson Street (telephone) 802-878-8307 Essex Junction VT 05452 (facsimile) 802-878-2479 www.flexaseal.com/engineered_fluid



CCASE HISTORY FOR BOILER FEED PROCESSASE HISTORY FOR BOILER FEED PROCESS This heating facility was using a competitor component seal on their nine (9) Byron Jack-son pumps. They were also using a standard heat exchanger. This configuration was only providing a maximum of one (1) year sealing life. The customer did not want to upgrade the existing heat exchangers, so we provided a cartridge design to work within the present parameters. In addition, we assisted the cus-tomer in properly cleaning and maintaining their heat exchangers to ensure optimum conditions for seal operation. We upgraded the soft face to antimony impregnated carbon and the elastomers from EPR to Aflas™. Both these basic changes extended the operating conditions of the seal. We also verified the seals were correctly piped to API Plan 23. Seal life was dramatically in-creased to over three (3) years for some of these pumps.



Solutions for

High Pressure Applications HHigh pressure applications can be very difficult to seal properly. Concerns include ♦ Emissions control ♦ Environmental safety ♦ Excessive heat generation ♦ Unexpected pressure spikes due to

power losses or surges Excessive hydraulic pressures can wear or distort seal faces in a short period of time and extrude elastomers. Higher pressures on rotating equipment generate axial and radial movement and vibrations which can affect seal life.

Our Sealing Advantages

Stepped cartridge sleeve - aids in keeping the rotary assembly in perfect alignment with the stationary face and keeps the seal from unloading in the case of pressure changes. Stationary drive mechanism - also helps in keeping the faces aligned while the seal op-erates under higher pressure. Antimony impregnated carbon face - ex-periences less face distortion at higher pres-sures due to its inherent strength and has better thermal conductivity than standard carbon grades. Additional hardware - such as Teflon® anti-extrusion rings and hardened steel set screws stand up to the rigors of service. Retained Throttle bushing - is additional protection in the event of seal failure.


Engineered Fluid ManagementEngineered Fluid Management Flex Flex--AA--Seal Seal

Solutions for

High Pressure Applications

Stationary drive mechanism keeps faces aligned under

high pressure

Teflon® anti-extrusion ring

Retained throttle bushing for added safety

Diffuser and pumping ring for high pressure/high temperature applications. Assists in cooling

the seal’s faces.

Rugged, high strength antimony impregnated carbon face with-stands high pressure demands

Confined gasket prevents “flow out”

All seal components are designed for rugged, heavy duty service.

CCASE HISTORY FOR HIGH PRESSURE/HIGH TEMPERATURE CARTRIDGE SEALASE HISTORY FOR HIGH PRESSURE/HIGH TEMPERATURE CARTRIDGE SEAL

A chemical process facility in Kentucky had problems sealing a high temperature/high pressure application. They were pumping water at 450ºF water with traces of ethylene di-chloride and pressures of 345 psi on suction and 400 psi on discharge. Their most recent attempt to seal the application was with a competitor double cartridge seal; this method was averaging one week of seal life. We developed a stationary high pressure/high temperature multi spring design utilizing a pumping ring and multi-point injection arrangement. The addition of these two features allowed cooler media to circulate around the faces. We also piped the seal through a heat exchanger and constructed a large part of the seal outside the box to increase cooling effi-ciency. This engineered seal solved several of the customer’s concerns. Average seal life is one year and the customer continues to be pleased by the seal’s performance in the applica-tion.




Engineered Fluid Management (toll free USA) 800-426-3594 1 Jackson Street (telephone) 802-878-8307 Essex Junction VT 05452 (facsimile) 802-878-2479 www.flexaseal.com/engineered_fluid

CASE HISTORY FOR HIGH PRESSURE CARTRIDGE SEALCASE HISTORY FOR HIGH PRESSURE CARTRIDGE SEAL

A ski area in New England used an Ingersoll Rand 7-stage vertical turbine packed pump in their snowmaking area. The media pumped was pond water as 1100 psi. The packing re-quired substantial labor to maintain during the seasons of significant water consumption. The end user was concerned about downt ime since the pump was critical for the resort’s economy during the ski season. We designed a multiple spring cartridge incorporating the existing packing gland. We also established pressure relief lines from the lantern ring and gland connections. Reducing the stuffing box pressure to 800 psi relieved the hydraulic pressure on the seal, more specifi-cally the seal faces. A Spiral Trac™ throat bushing disperses the pond water’s grit and sol-ids from the stuffing box, allowing the seal to operate in a cleaner environment. We installed the seal at the beginning of the snowmaking season, and the resort was able to operate the entire season without downtime. They also noticed substantial economic savings since they no longer had the water leakage associated with packing or sleeve re-placement costs.



There are many different applications in high temperature chemical processing. Each of these applications must be sealed successfully to ensure zero rate of leakage. Processes include: ♦ Toxic, volatile, or flammable media ♦ Highly corrosive fluids ♦ Highly abrasive slurries ♦ Expensive product


Chemical Processes

Our Sealing Advantages Rotating Bellows - centrifugal force spins clogging particles away from the bellows core Static Bellows Packing - many chemical processes are the enemy of dynamic elas-tomers. Providing a static packing in the bellows eliminates hang up concerns due to elastomer limitations by chemicals or temperature Equipment adaptability - hydraulically balanced bellows provide higher pressure capabilities. The flexible bellows ‘give’ with individual pump tolerances We provide a range of metallurgies and

face combinations to successfully seal some of the most demanding chemical

applications.

Flex-A-Seal (toll free USA) 800-426-3594 1 Jackson Street (telephone) 802-878-8307 Essex Junction VT 05452 (facsimile) 802-878 -2479


Engineered Fluid ManagementEngineered Fluid Management Flex Flex--AA--SealSeal

Single Welded Metal Bellows High Temperature Cartridge


Chemical Processes

Dual Welded Metal Bellows High Temperature Cartridge

Rotating Bellows throw clogging

particles away from core

Grafoil packing eliminates chemical

or temperature limitations

Throttle bushing minimizes leakage

Circulation Connections to

keep cooling fluid around the seal

faces.

Pumping ring circulates cooling liquid through-out the seal chamber

Vent and drain connection for steam quench

To water jacket for steam quench

CCASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEAL ASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEAL IN CHEMICAL PROCESSIN CHEMICAL PROCESS

A large chemical manufacturer in Brazil utilized German-made Rheinhute 1 7/8” pumps for one of their most critical plant applications. This particular pump design had virtually no stuffing box. This confined configuration made piping very difficult. The distilled amine media had traces of copper which caused excessive plating, which in turn caused hang up of the carbon vs. silicon carbide face combination. This problem generated ex-treme heat. The end user was relying only on thermal siphoning for barrier fluid movement; pump temperatures were up to 572ºF and this additional heat soak increased the temperatures at the faces. Amine also posed a chemical compatibility problem with the elastomers. Previous sealing methods utilized dynamic Teflon wedges which hung up and did not perform well in the high tempera-tures. We designed a tandem welded bellows cartridge with a two-piece gland. This design allowed us to build much of the seal outside the stuffing box, accommodating the special piping requirements and tight space requirements. Converting the face combination to tungsten vs. silicon addressed the abrasive copper traces and adding a pumping ring moved cooler barrier fluid across the in-board faces. Static grafoil packing in the bellows solved the problems of elastomer hang up. Previously, competitor seals were replaced every two weeks. The customer was so satisfied after our seal had performed trouble-free for several months, they purchased additional cartridges for other pumps.




A major chemical manufacturer in West Virginia experienced years of sealing problems on a Goulds 3175M pump used as a reaction circulator. The media, a Polyol solution of pr o-pylene and ethylene oxides, attacked the elastomers. In addition, the pump was subject to pressure fluctuations and increased product viscosity due the temperature changes. Previ-ous seal cartridges were lasting on an average of two weeks. Our double tandem design, utilizing grafoil packing, high temperature bellows and a pumping ring, solved these critical sealing issues as well as lowered emissions levels and significantly increased seal life to well over a year between reconditionings. The end user was so pleased with our solution, they now utilize several of these seals in the plant.




A North Carolina chemical plant utilized a succession of pusher seals to seal an expensive media, dimethyl phalate at 450º F. They experienced consistent problems with elastomer failure, averag-ing two weeks per seal. The end user was very concerned about the economic and environmental repercussions of the seal failure. We developed a non-elastomeric, high temperature cartridge which eliminated all secondary pack-ing material except for a Teflon®-jacketed sleeve o-ring. We also incorporated a unique multi-bellows configuration design for self-alignment. Since the product hardens when cooled, we posi-tioned the faces inside the box under the steam jacket, where the product would stay liquidified as long as possible. The customer is very pleased with the solution - the seals are still in operation and significant eco-nomic and environmental consequences have been alleviated.



Faces positioned under steam jacket for optimum operating conditions.




Heat Transfer Fluid

Heat transfer fluids are used for the indirect transfer of processing heat and bulk material heating. Heat transfer fluids offer efficient operation, minimum maintenance, and accurate tem-perature control for a variety of processes which operate at much lower temperatures than a steam system: ♦ Chemical and hydrocarbon processing ♦ Polymers and process liquids ♦ Single fluid process heating and cooling ♦ Drying and heating of bulk materials ♦ Gas processing ♦ Pipeline tracing ♦ Heat recovery

Fluid Protection Thermal Degradation - Fluctuations in temperature can cause carbon solids (coke) to form on metal surfaces. Solids - Rust, dirt, and scale can infil-trate the system, fouling product.

Our rotating bellows design spins solids away from the seal, reducing

buildup.

Process Contamination - May result in product decomposition or solid/ sludge formation. Oxidation - Can create a high solid content or change the viscosity of the fluid. Our high temperature bellows are designed with no dynamic elastomer to hang up in the product. Glands are designed with circulation, vent, and drains to keep fluid circulation around the faces. Utilizing a steam quench also creates optimal operat-ing conditions by cooling the faces and preventing coking on the atmos-pheric side of the seal.






Heat Transfer Fluid









faces.






CCASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEALASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEAL IN HEAT TRANSFER FLUID PROCESSIN HEAT TRANSFER FLUID PROCESS

A Midwestern chemical process plant planned on converting their Dean Brothers R434 pumps from single to dual seals for emission control. They set stringent criteria on the dual seal design including high temperature capabilities both inboard and outboard, utilization of a pumping ring for positive barrier fluid circulation, and stipulated there could be no modifi-cation to the pump itself. We constructed the above seal to fit the tight space requirements of the R434. We met all the customer’s criteria with an economical design. The customer was so satisfied with the seal they not only converted all their R434 pumps to our design, but their Dean Brothers R454 pumps as well.



CASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEALCASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEAL

IN HEAT TRANSFER FLUID PROCESSIN HEAT TRANSFER FLUID PROCESS A manufacturing facility in Ohio purchased several Goulds 3196 MTX big bore pumps in 1995. Previous high temperature sealing methods in the plant included hook sleeve compo-nent designs which are difficult to set properly. We discussed the high temperature cartridge option with the customer and they were willing to use the design in the new pumps. The above design has been successful. In fact in September 2003, we received one of the original seals for its first repair since being installed in 1995. The end user is very pleased with the seal’s longevity and performance in this high temperature application.




Hydrocarbon Process

The petrochemical industry covers many types of sealing situations. Process concerns include ♦ Emission controls ♦ Product range from low specific gravity to high viscosity fluids ♦ Flammable vapors ♦ Abrasive-laden fluids ♦ High speeds ♦ High pressures ♦ Temperatures up to 800º Fahrenheit Many industries are dependent on petro-chemicals. Refineries are very concerned about mechanical upsets since the resulting downtime may incur in huge economic losses.


Heat treated bellows core - to handle higher temperature and pressure sealing needs. Bellows Design - has no dynamic elas-tomer to hang up in product. Premium hard face option - Silicon car-bide versus nickel bound tungsten car-bide effectively seals abrasive, gritty appli-cations. Antimony impregnated carbon - the thermal conductivity is almost double that of standard carbon grades. Antimony takes the place of standard carbon resins and won’t ‘bake out’ in higher tempera-tures. Antimony impregnated carbon also experiences less face distortion at higher pressures due to its higher compression strength. Dual seal configurations - address the issue of emissions. Hydraulically balanced design - for higher pressure capabilities.






Hydrocarbon Process









faces.






CASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEALCASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEAL IN HYDROCARBON PROCESSIN HYDROCARBON PROCESS

In 2001, we were awarded a contract for a national South American refinery. Up until 2001, the plant primarily used component seals. We developed API standard seals for over ninety (90) pumps in the facility. The seal pictured above was for one of their basic high temperature services. We designed the seal to work with API piping plans 11 and 62 steam quench. The steam was directed under the bellows to the faces using a bronze steam deflector to prevent coking. Engineering and sales representatives from our facility spent extensive time at the refinery to work closely with plant engineers and production staff as we implemented this project.


CCASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEALASE HISTORY FOR HIGH TEMPERATURE CARTRIDGE SEAL IN HYDROCARBON PROCESSIN HYDROCARBON PROCESS

We have worked closely with this domestic refinery for several years as they convert their specialized cartridges. This particular service had very specific concerns: temperature, pres-sure, the product’s specific gravity, and emissions. Based on the customer’s information and requests, we designed this seal for API plan 52 on the outboard end and API plan 23 on the inboard. Both inboard and outboard bellows assemblies are double-ply design to handle the high pressure. Pumping rings were placed on both sides to aid in cooling the lighter specific gravity media. By lowering the tempera-ture, we were able to lower the vapor point margin. Positively circulating the cooling fluid around the seal faces also lowered the temperature, creating better face lubrication dur-ing operation. The customer is very pleased with the design of this seal. We worked closely with the plant engineer to address concerns and the proof has been the on-going, successful operation of this seal.


Flex-A-Seal (toll free USA) 800-426-3594 1 Jackson Street (telephone) 802-878 -8307 Essex Junction VT 05452 www.flexaseal.com/engineered_fluid (facsimile) 802-878-2479


Mixers, Agitators, and Centrifuges

Solutions Include ♦ Split Cartridge with and without Bladders ♦ Welded Bellows or Multi-spring designs ♦ Single or Dual cartridges for easy installation ♦ High run out capabilities ♦ Zero emissions ♦ Virtually any metallurgy, elastomer, and face

combination for any application ♦ Dry running or pressurized / nonpressurized

barrier fluid options ♦ Conversion of ‘wet’ seal to dry-contacting option

Sealing Challenges ♦ Space Limitations ♦ Critical Units ♦ Expensive Batch Products ♦ Zero Emissions Restrictions ♦ Equipment with High Run Out ♦ System Shocks ♦ Unique Barrier Fluid Requirements ♦ Vacuum Services ♦ Abrasives ♦ Dry media ♦ High Temperatures ♦ High Pressures ♦ Pressure Reversals

There is no one universal seal for all mixer applications. Every mixer, agitator, and reactor model is distinctive and engineered for a specific application. Successful sealing is established by clearly defining the type of equipment, the product, and the sealing conditions. We offer innovative solutions for your toughest challenges.

To pE n try

Sid e E n try

Bo tto mE n try

Sid e E n try

Sty le 85F ully S plit

M u lti-spr in gC a rtridg e Sea l

S tyle 78Ta nd em

R otating B ellow sC artrid g e S eal

Sty le 79T a nd em

M u lti-spr in gC a rtridg e Sea l

Sty le 5 0S ing le

R otatin g B ellow sC a rtridg e Sea l

BASIC M IXER & AGITATORCONFIGURATIONS

W ITH SEAL SOLUTIONS



Solutions for

MIXERS Split Cartridges

with and without Bladders

Style 85 Sealing Advantages

The only fully split cartridge design on the market elim i-nates the two major causes of seal failure - incorrect installation of component pieces and mishandling of the precision-lapped faces Easily converts a packed mixer Cartridge-style set clips provide correct and true align-ment and makes this seal the fastest and easiest seal to install on the market today! No measurements, shims, or special installation tools required. Springs are out of product, minimizing clogging Universal gland easily fits a majority of mixers, pumps and special equipment.

Style 85 with Bladder

Bladder is fully inflatable for installation in side and bottom entry mixers. Just inflate bladder with shop air during seal change out. Install new seal, then de-flate bladder. No need to empty the vessel beforehand and no product is lost from the vessel during the process! Our Style 85 fully split cartridge seal is fully pressured tested at the factory before shipment. We guarantee materials and workmanship.

Style 85 Materials of Construction Dry running options available - consult factory for details

Metallurgy- Faces - Elastomers- 316 Stainless Steel Carbon Viton™ Hastelloy-C276® springs Silicon Carbide Fluoraz™

Patent #5662340



Solutions for

TOP ENTRY

MIXERS Welded Metal Bellows

Rotating Welded Metal Bellows Cartridge

♦ No dynamic elastomers to hang up in product ♦ Designed to eliminate air pockets around the seal

faces ♦ Can handle radial and axial shaft movement

Stationary Dual Face to Face

Welded Metal Bellows Cartridge (in addition to the single cartridge advantages)

♦ Stationary design allows for better face alignment ♦ Shorter ‘nearest obstruction’ requirement ♦ Smaller gland size minimizes weight, making this

an excellent choice for larger shaft sizes ♦ Shorter sleeve minimizes exotic metals cost (if required) ♦ Pumping ring design can be added if necessary. ♦ Accommodates pressure reversals ♦ Balanced designed for forced lubrication systems

TOP →→

TOP ←←



Solutions for

TOP ENTRY

MIXERS Stationary Multi -spring

Stationary Tandem Multi-spring Cartridge

♦ Excellent for high pressure vessels ♦ Balanced design accommodates

pressure reversals

Stationary Dual Multi-spring Cartridge

♦ Smooth profile is excellent for demanding

pharmaceutical applications. ♦ Adaptable to glass-sleeved mixers ♦ Accommodates short nearest obstructions

Stationary Designs Provide ♦ Expanded clearances for high run out ♦ Springs located out of product to eliminate clogging ♦ Designed for forced circulation ♦ Optimum face alignment ♦ Can incorporate a pumping ring for maximum barrier

fluid flow



Solutions for

TOP ENTRY

MIXERS

Dry Running Dual Design

Multi-spring or Welded Metal Bellows

Our Dry Running Design Solution Elimination of costly barrier fluid systems Seal operation takes place out of product No product dilution or contamination Can be designed for excessive run out capabilities Stationary design for optimal face alignment Easy to install and repair State-of-the-art face technology and optimal face material selection to insure minimal coefficient of friction

Stationary Multi-spring Dual Cartridge

♦ No face lubrication required ♦ Shrouded faces for protection and improved

drive ♦ Springs designed to operate out of product ♦ Easily adaptable for large shaft sizes

Stationary Welded Metal Bellows Dual Cartridge

♦ Barrier to atmosphere is an inert gas as opposed to a barrier fluid liquid

♦ No product dilution or contamination with costly liquid barrier fluid

♦ Gas barrier maintains higher pressure over product pressure

♦ Zero emissions ♦ No dynamic elastomers, eliminates o-ring

hysterisis ♦ Bellows has lower face loading than multi -

spring design ♦ Tandem, back to back, or face to face de-

signs available

TOP →→



Solutions for

TOP ENTRY

MIXERS Dry Running

Single Seal Design Multi-spring or Welded Metal Bellows

STYLE 50/53 DRY RUNNING CAPABILITY (CARBON GRAPHITE VS SILICON CARBIDE)(Max Temp. 250 deg. F)

CONSULT FLEX-A-SEAL ENGINEERING FOR SPECIAL DESIGN IF APPLICATION EXCEEDS BELOW LIMITS

0

10

20

30

40

50

60

70

80

0 200 400 600 800 1000 1200MAX SPEED (RPM)

TO DETERMINE LIMITS: SELECT PESSURE. READ ACROSS TO THE NEAREST CARTRIDGE SIZE CURVE THEN READ DOWN TO THE MAX SPEED.

FOR EXAMPLE: 1 3/4 CARTRIDGE SIZE AT 40 psi HAS A MAXIMUM SPEED OF 460 rpm

PR

ESS

UR

E (P

SI)

1" (25mm)

1 3/8 (35mm)

1 3/4 (43mm)

2 5/8 (65mm)

Cartridge Size

Flex-A-Seal (toll free USA) 800-426-3594 1 Jackson Street (telephone) 802-878-8307 Essex Junction VT 05452 www.flexaseal.com/engineered_fluid (facsimile) 802-878 -2479


Solutions for

SIDE ENTRY MIXERS

Stationary Single Spring Cartridge

♦ Large clearances and widened faces for ex-

cessive run out ♦ Stationary design provides optimum face

alignment ♦ Springs are located out of the product ♦ Shrouded faces for additional protection and

superior drive

Rotating Tandem Welded Metal Bellows Cartridge

♦ Clearances designed for excessive run out ♦ High temperature capabilities ♦ Designed to eliminate air pockets around

seal faces ♦ Balanced for forced lubrication systems ♦ Handles pressure reversals ♦ No dynamic elastomers to hang up ♦ Easily installed cartridge design ♦ Fully bench tested at factory before ship-

ment ♦ Handles high solids concentrations by using

centrifugal force to throw media away from bellows core

♦ Pumping ring can be added for maximum barrier fluid flow. Barrier fluid is located on the OD of the outboard seal for optimum circulations and enhanced cooling



Solutions for

BOTTOM ENTRY MIXERS

Rotating Welded Metal Bellows Cartridge

♦ Rotating bellows uses centrifugal

force to move clogging media away from seal

♦ No springs to break or clog ♦ No dynamic elastomers to hang up

in product

♦ Hydraulically balanced design

♦ Uniform 360º of torque to primary

rotating face

Stationary Dual Multi-spring Cartridge

♦ Faces are raised above the bottom of the

tank, eliminating accumulating solids around the seal

♦ Internal barrier fluid flow diverter ensures

proper face lubrication and cooling ♦ Can be operated in either a pressurized or

non-pressurized state ♦ Stationary design for optimum face align-

ment ♦ Springs are protected from the product ♦ Easily adaptable for extreme run out →→ TOPTOP

TOP

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P u m p S t a t io nG rit R e m o v a l

S o lid s T re a t m e n t

S e c o n da r y

T re a t m e n t

In flu e n t In t oP ro c e s s

A e ra t io n

T a n ks

T e rt ia ryT re a t m e n t

D i sin fe c t io n

B a s in

D e -c h lo r in a t io n

T o S o lid s T re a t m e n t

S e c o n d a ry

C la r ific a t io n

F i n e S c re e n s

P r im a ry

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B len d ing T an ks

B io s o lid s

P re s s e s

D ry in g B e d s

D ig e st o rs

S e t t lin g T a n k sG ra v it y B e lt s

W aste W ater T reatm entFlow C hart



Seal Recommendations by ProductSeal Recommendations by Product

Style 57 - Unbalanced single spring cartridge Style 85 - Patented fully split multi-spring cartridge

Style RB - rotating bellows cartridge FAV-06 - component seals for Flygt submersible

pumps

FlexFlex--AA--Gard Products available for Gard Products available for Waste Water EquipmentWaste Water Equipment

Grit Buckets Bar Screen Rakes Poly-Steel Chain

Sprockets Slide Rails

Flights



Solutions for Waste Water Treatment

Wastewater treatment must address economic as well as environmental concerns. Purification of waste is vital to a community’s ecosystem. Since this process is strictly regulated and moni-tored, municipal water authorities must comply with increasingly involved and costly govern-ment-mandated water quality regulations. We offer a variety of economic, easy-to-install, easy-to-repair sealing options for all areas of wastewater treatment. Mechanical seals elimi-nate the need for high-maintenance pump pack-ing as well as address all the waste water proc-esses from thick sludge to chlorinated water.


Unlike packing, mechanical seals ♦ Do not have an initial adjustment period ♦ Do not have a rigid maintenance sched-

ule ♦ Do not abrade or damage pump shafts ♦ Minimize water consumption and usage ♦ Are designed to handle the strenuous

processes of wastewater treatment Our seals are designed with ♦ Self-sintered silicon carbide vs. nickel -

bound tungsten carbide faces for abra-sive applications.

♦ Rugged single springs which can not clog or break

♦ Multi-spring designs that are protected and do not see product

♦ Rotating welded metal bellows use cen-trifugal force to move clogging media away from the seal

♦ High axial thrust capabilities for problem pumps



Rotating bellows uses centrifugal force to “throw” media away

from bellows core

No dynamic elastomers to hang up due to chemical or thermal attack

Hydraulically balanced design with even face loading and uniform,

360º torque transfer to primary rotating face for

consistently superior operation and sealing

Heavy duty, rugged single spring de-sign eliminates the clogging seen in

smaller multi-spring designs

Seal is designed with high axial thrust capabilities.

Rotating face is shrouded for

additional protection from abrasive media




The Style 85’s easy installation offers significant

time and money savings.

Sealing Advantages The only fully split cartridge design on the market eliminates many component pieces and mishandling of faces. Easily converts a packed pump to a sealed pump. Pumps do not have to be disassembled or motors pulled for installation or re-moval Springs are out of product, minimizing clogging. Universal gland easily fits a majority of pumps and mixers.

Materials of Construction Faces - Carbon Silicon Carbide Elastomers- Viton™ Aflas™ Metallurgy- 316 Stainless Steel Hastelloy-C276® springs

Style 85 Fully Split Cartridge Seal

For Waste Water Applications

US Patent #5662340



A large wastewater plant in Washington DC uses a Morris MF80 sludge pump with a 3 3/4” shaft. Previous seal installations required pulling out the shaft and bearings, bolting the seal to the pump, then feeding the shaft back through the seal. The entire process typically took two production days. We installed a patented Style 85 split cartridge seal in fifteen (15) minutes. This seal has contin-ued to run over one year without incident. Flex-A-Seal has proven the economic and time benefits of easy installation and low maintenance in waste water treatment plants all over the country. Our patented split cartridge design has advanced past all other current split compo-nent seal technologies on the market.

CASE HISTORY FOR STYLE 85 / FULLY SPLIT CARTRIDGE SEAL CASE HISTORY FOR STYLE 85 / FULLY SPLIT CARTRIDGE SEAL IN WASTE WATERIN WASTE WATER



A US steel mill in Indiana uses Goulds vertical pumps to move dirty water for their descaling process. Previous sealing methods proved unsuccessful and the end user became very un-happy with the lack of technical support when seals continued to fail. We were called in to analyzed the situation and verified our patented Style 85 fully split car-tridge seal would operate successfully in the process. We proposed the design, explaining the installation and maintenance benefits. The end user installed their first Style 85 in less than thirty (30) minutes and the seal has been operating trouble-free. The end user is extremely pleased with the seal’s operation and moreover, our assistance and recommendation to find a solution.

CASE HISTORY FOR STYLE 85 / FULLY SPLIT CARTRIDGE SEAL CASE HISTORY FOR STYLE 85 / FULLY SPLIT CARTRIDGE SEAL IN WASTE WATERIN WASTE WATER




Flygt® Submersible Pumps

Flygt® submersibles are commonly found in municipal waste treatment facilities, han-dling solids. A large city’s sewage treatment facility may incorporate as many as 1000 lift stations., each with its own submersible pump. Submersibles are also used in raw water treatment, storm water pumping and irriga-tion systems. Flygt® submersible pumps require two seals, an upper seal which runs in oil and is normally carbon vs. tungsten carbide and a lower seal in product which runs tungsten carbide vs. tungsten carbide. While the pumps themselves may have up-wards of a 20 year operating life, the me-chanical seals are subjected to intensive op-erating conditions and are replaced much more frequently. In addition, Flygt® pumps have a different seal style/installation process for each pump size, which makes replacement, mainte-nance, and inventory difficult to manage.

Our Sealing Advantages Superior Materials - Seals’ metal com-ponents use stainless steel. There are no plastic materials to accelerate wear. Op-eration and seal life is optimized Economical - Standardized seal design and no special installation tooling allows customer to keep stock and save time on installation Monolithic Seal Faces - are less likely to undergo thermal distortion than brazed faces which can gap when the dissimilar metals are heated.

Set screws eliminate

installation headaches

Monolithic tungsten carbide

face is rugged and far superior

to brazed tungsten mating ring options in metal retainers




Flygt® Submersible Pumps

Garter spring drive needs special

installation tool

Plastic components wear at an

accelerated rate of speed

Stamped/pressed steel is not rugged

enough for demanding operation

Solid, machined stainless steel construction is better than pressed or stamped steel to withstand harsh, abrasive

operation conditions



Application Guide toApplication Guide to Control EmissionsControl Emissions

Chart Area Acceptable Seal Design

1 General service, single or dual design

2 Special purpose single seals or dual seals

3 Dual pressurized (double) seals Single or dual non-pressurized (tandem) seals vented to a closed vent system, above 0.4 specific gravity

Cha

rt a

nd g

raph

- ST

LE s

pec

pub

SP-3

0 19

94



Solutions for Emissions Control


Gas barrier and dry running designs available.

Hydraulically balanced faces - reduce face loading and the subsequent, generated heat. Hydraulic balance designs also allow for higher pressure capabilities Tandem design - maintains product and bar-rier fluid on the outside diameter of both the inboard and outboard sides of the seal, in-creasing safety and promoting improved heat dissipation Additional seal designs may include ♦ Pumping rings to maximize the flow of

cooling fluid around the seal faces ♦ Antimony impregnated carbon seal faces

for increased thermal conductivity and in-creased strength for less face distortion at higher pressures

♦ Shrouded multi-spring designs ♦ Double seal designs with external lubrica-

tion for higher pressure applications, tan-dem designs with internal lubrication for lower pressure processes

Emissions control has many areas of concern. Plants must effectively address the issues of existing and potential dan-gerous situations. These issues include - • System and personnel safety • Equipment reliability • Emissions monitoring on both the

state and federal levels • Economic solutions We offer in-depth engineering consult-ing and design options to meet even the most difficult applications for this field.



Double balanced inboard faces allow for reverse pressure fluctuations.

Tandem design increases safety and heat dissipation by maintaining a large volume of fluid on the outside diameter

of both inboard and outboard sides.

Incorporated pumping ring positively circulates

barrier fluid for the most effective removal

of generated heat.

Tangential connection optimizes barrier fluid flow.

Springs are stationary for better face alignment and are protected for product.

Solutions for Emissions Control




CCASE HISTORY FOR EMISSIONS IN CHEMICAL PROCESSINGASE HISTORY FOR EMISSIONS IN CHEMICAL PROCESSING Chemical processing has numerous points of emission concerns. Hexane, an organic emis-sion is one of the most common. To address hexane’s light specific gravity and comply with API regulations, Flex-A-Seal developed the above tandem multi-spring cartridge for a chemi-cal process facility in Texas. The tandem design maintained product and barrier fluid on the outside diameter of both in-board and outboard sides, increasing safety and heat dissipation. The balanced inboard faces allowed for reverse pressure fluctuations. The mineral oil barrier fluid was recirculated through a pressurized reservoir. The integral pumping ring design allowed this fluid to flow around and cool the seal chamber. The lack of abrasives and low operating temperatures enabled us to use a carbon versus self-sintered silicon carbide face combination on both the inboard and outboard sides.


Engineered Fluid Management (toll free USA) 800-426-3594 1 Jackson Street (telephone) 802-878-8307 Essex Junction VT 05458 (facsimile) 802-878-2479 www.flexaseal.com/engineered_fluid

CASE HISTORY FOR EMISSIONS IN HYDROCARBON PROCESSCASE HISTORY FOR EMISSIONS IN HYDROCARBON PROCESS

In 2001, we were awarded a contract for a national South American refinery. Up to 2001, the plant primarily used component seals. We developed API standard seals for over 100 pumps in the facility. The seal pictured above was a dual bellows seal for one of the harsher services, 20% DEA with H2S. Some design features of this seal include a metal to metal confined gasket to prevent blow out or extrusion of the gasket, a gland shoulder at least 1/8” thick to prevent the seal’s stationary element from dislodging due to seal chamber pressure, a thicker cartridge sleeve to eliminate distortion due to tightening of the set screws, and a stationary design in-board for maximum face alignment on the critical product side. Engineering and sales representatives from Flex-A-Seal spent time at the refinery to work closely with plant engineers and production staff as we implemented this project.



Solutions for

Cryogenic Process PumpsCryogenic Process Pumps

Our Cryogenic Solution Welded Metal Bellows Technology and Production - Flex-A-Seal has earned an exemplary reputation as a leader in welded metal bellows technology. We have successfully applied these same engineering capabilities to the rigorous demands of very low temperature cryogenic ap-plications. All manufacturing processes are done in house with tightly controlled tolerances on all seal components, resulting in proven successful seal life. Cryogenic Face Solutions - Optimum face materials and design maintain the critical film of lubricant between the seal faces which is crucial for successful operation at temperatures ap-proaching –328° F (-200° C). Compatibility - Our cryogenic designs are engineered to fit virtually all standard centrifugal cryogenic pumps used primarily to transfer liquid nitrogen, hydrogen, oxygen, and argon. These pumps can be found in industrial areas such as process systems, air separation, storage tanks, trucks and transfer stations. Common Pumps - We have seals to fit the most common pumps on the market including ACD, Cosmodyne, Airco Paul, Cryostar, and JC Carter. Cleaning - We offer full service manufacturing including oxygen cleaning according to indus-try standards and certification.

Cryogenic liquids like oxygen, nitrogen, and argon can slow down and stabilize chemical reactions in many different processes. This insures accurate measure-ment or transportation of volatile materi-als. Cryogenic liquids are typically deliv-ered via trucks or railroad cars and re-quire specific sealing to protect the liq-uid. Many industrial areas such as food processing and medical facilities also use cryogenic pumps and seals.



Solutions for

Cryogenic Process Pumps Cryogenic Process Pumps

Edge welded metal bellowsallow for higher pressurecapabilities while maintaininglower, more accurate springrates than inconsistent,formed bellows.

347 Stainless Steel bellowsconstruction is proven to bethe premier bellows materialin cryogenic applications. Itmaintains its strength anddoes not become brittle inextremely cold environments.

The “rolled” section of the commonformed bellows has inherent thinareas on the O.D. and I.D. surfacesfrom the forming process of themetal. Edge welded bellowseliminate these weak stress points.Consequently, edge-welded bellowsare a more reliable compressionunit because of the ability to handlerepeated flexing on everyrevolution.

The tungsten carbide rotatingface provides better thermalconductivity properties andincreased hardness improvingperformance over the industrystandard of simple hardenedstainless steel.

Flex-A-Seal uses a specialcryogenic grade of carbongraphite with excellent filmforming properties whichallows a state of “self-lubrication” operation in theextreme low temperaturesof cryogenic operation.

The combination of TC andspecial carbon graphite facesmaximizes the PV values andoptimizes the face balance.

More accurate spring rates leadto more precise face loadsproviding a minimum amount ofheat generation which is criticalfor sealing liquid close to itsvapor point.



Solutions for


Designs for Cosmodyne

Pumps Brass Sleeve

Brass Sleeve



Solutions for


Design for Cryostar Pumps

Design for Airco Paul

Pumps

Brass Sleeve

Flow Chart for P & P



Pulp and Paper BinderPulp and Paper Binder

Pull the following sections-

Boiler Feed & Condensate High Temperature

Interseal Mixers and Agitators

Pulp and Paper



Pulp and Paper IndustryPulp and Paper Industry Seal Recommendations by ProcessSeal Recommendations by Process

Process Single Dual Notes Black Liquor < 25% solids Style RB3/SB3 Use steam quench Black Liquor > 25% solids Style 76/78 Black/White Liquor Mix Style 76/78

Filtrate with Caustic Style RB3/SB3 Style 76/78

with Chlorine Dioxide Style SS3 Style 72/75 Special materials Chlorine Dioxide Style 72/75 Special materials Fiber with White Water Styles RB1/SB1/85 Use flush on single Green Liquor Style RB3/SB3 Style 76/78 Lime Mud Style SS3 Style 72/75 Lime Water Style SS1/85 Style 72/75

Paper Stock up to 5% Style SS1/SB3/85 Use flush on single over 5% Style 76/78

Bleached Style SS1/RB1 Style 76/78 Use flush on single Washed Style 76/78

with Caustic Style SS1/RB1 Style 76/78 Use flush on single Waste Water Style RB1/SB1/85

Water Style RB1/SB1/85 White Liquor Style 76/78

Clarified Style SS3 Style 72/75 with Mud Style SS3 Style 72/75



Solutions for Pulp and Paper

Pulping and Washing

The first stages of the pulp and paper proc-ess are the digester or pulper where the wood chips are processed in a liquid solu-tion to soften the wood fibers. The washing process then removes the liquor residues from the pulp for the next production stage. Typical Kraft application concerns include ♦ White Liquor - an alkali solution of so-

dium sulphide and sodium hydroxide used to “cook” and flush wood chips to and from the feeder.

♦ Black Liquor - the liquid remaining from the cooking process. This is generally bro-ken down into Weak (less than 20%), Strong (between 20-50%) and Heavy (over 50%)

♦ Brown Stock - pulp prior to washing and bleaching

♦ Products that will typically crystallize or set up when exposed to air

Our Sealing Advantages Paper Stock ♦ Beefy spring located out of product to pre-

vent clogging ♦ Flush connection keeps fluid circulating

around seal faces ♦ Hydraulically balanced seal design ♦ Open clearance around the seal to pre-

vent accumulation of fibers White Liquor ♦ Tandem design maintains product and bar-

rier fluid pressure on the OD of the seals for optimum cooling and personnel safety

♦ Double balanced inboard faces allow for reverse pressure upsets

♦ Self-sintered silicon carbide versus nickel bound tungsten carbide inboard faces for abrasive media

♦ Hastelloy bellows core addresses corrosive properties

Black Liquor ♦ Self-cleaning rotating bellows keeps prod-

uct from bellows core ♦ Tandem seals are designed for either pres-

surized or non-pressurized operation. ♦ Self-sintered silicon carbide versus nickel

bound tungsten carbide inboard faces for abrasive media

♦ Hastelloy bellows core addresses corrosive properties




Paper Stock

Seal is hydraulically balanced to minimize face pressure,

face wear and excessive heat generation between the face.

Beefy single spring is located out of the product, to minimize/eliminate clogging

Vent and drain connection is available to add lubrication grease if desired

This seal design effectively and economically addresses pulp sealing in different stages of

the papermaking process.



CASE HISTORY FOR PULP AND PAPERCASE HISTORY FOR PULP AND PAPER——SINGLE SPRING CARTRIDGESINGLE SPRING CARTRIDGE A pulp and paper mill in Ontario processed 4% pulp stock in a packed Esscher Wyss double disc refiner. The end user required a seal that would allow for efficient axial shaft adjust-ment as the disc refiner wore. In addition to packing leakage reduction and necessary ad-justments the end user sought to reduce maintenance and power costs. Our solution was to utilize a special Style 37 balanced single spring cartridge seal. This al-lowed for 3/4” axial end play. The rugged design, with the spring located out of the prod-uct, operated trouble-free and eliminated all maintenance costs associated with packing. The end user was so pleased with the Style 37’s performance, they converted all their refin-ers to this style.



Using a dual cartridge design to seal black liquor applications allows us to

address many concerns, such as viscosity, hardening/set up, corrosiveness,

and abrasiveness.


Black Liquor

Incorporated pumping ring circulates cooling fluid around

seal faces.

Rotating bellows throws clogging media away from bellows core

Hastelloy bellows withstands the corrosive properties of

black liquor

Seal is designed to operate in pressurized or non-pressurized

environments

Tangential barrier fluid connections are designed for greater flow, increasing

effects of cooling on the faces



CASE HISTORY FOR PULP AND PAPER - BLACK LIQUOR A pulp and paper mill in Southern USA utilized a Chesterton LD 17 Frame A pump to process their black liquor. The facility was already familiar with our Style 78 tandem rotating bellows cartridge and wanted a similar design for this application. By modifying the inboard rotary and sleeve of our standard seal, we quickly, economically, and efficiently addressed the concern of the pump’s shallow stuffing box and provided our customer with the seal design they re-quested. This seal is designed with a Hastelloy-C276® bellows on the inboard to withstand the corrosive properties of black liquor. The rotating bellows uses centrifugal force to move media away from the bellows core, eliminating the possibility of clogging. The outboard pumping ring positively circulates the cooling barrier fluid. The hard face combination of nickel bound tungsten car-bide versus self-sintered silicon carbide addresses the product’s abrasiveness.



Dual tandem designs provide an added level of safety when dealing

with corrosive and caustic services by maintaining product and barrier fluid

pressure on the outer diameter of both the inboard and outboard seals.


White Liquor

Springs are isolated from the product to eliminating clogging

With the seals higher ∆P and in-herent lighter load generates less

heat during operation

Double balanced inboard seal faces allow for reverse pressure

in upset situations.

Abrasive resistant inboard seal faces use

product for lubrication, minimizing water usage

Seal uses a Plan 54 for cooling the seal chamber



CASE HISTORY FOR PULP AND PAPER – WHITE LIQUOR A regional paper mill installed new ABS pumps in their white liquor treatment area. Since the plant was already familiar with Flex -A-Seal cartridges in other areas of their facility, they were interested in using our technology to seal this difficult application. We utilized a dual tandem design for a number of reasons. The foremost reason was safety - this design maintains product and barrier fluid pressure on the inside diameter of the inboard and the outer diame-ter of the outboard seals. The double balanced inboard seal faces allow for reverse pressures in upset situations. The outboard bellows creates a lighter load, generating less heat during operation. The seal design also included Hastelloy-C276® inboard bellows to withstand the caustic white liquor alkali and tungsten carbide versus silicon carbide faces inboard to work in the abrasive media. The out-side seal faces are silicon carbide vs. carbon. These seals have been operating successfully since their installation in Spring, 2002.

Flex-A-Seal (toll free USA) 800-426 -3594 1 Jackson Street (telephone) 802-878-8307 Essex Junction VT 05458 www.flexaseal.com/engineered_fluid (facsimile) 802-878-2479


Operation points

− Continuous operation − Potential for bleaching and

liquors in suspension. Standard pressures 0-15 psi Standard temperatures ~200º

Recommendations for Pulp and Paper Mixers and Agitators

Agitators

Are used to maintain cellulose fiber suspension and prevent material from packing at the bottom of the chest. Side entry agitators are the most common since the mate-rial may be moved at the pump’s suction, assisting flow.




Bleaching Chlorine Dioxide

The pulp and paper bleaching stage in-volves highly reactive chemical processes. These chemicals create a harsh environment in which seals must operate. Application concerns include ♦ Chlorine in an acid medium ♦ Hypochlorites in an alkaline medium ♦ Peroxides in an alkaline medium ♦ Chlorine dioxide in an acid medium ♦ Sodium hydroxide Some of these applications require titanium construction to effectively address corrosive-ness, necessary environmental controls, and personnel and plant safety.

Our Sealing Advantages For Bleaching ♦ Hastelloy C276® bellows or springs for

corrosion resistance ♦ Hydraulically balanced designs in single

and double seals to minimize face pres-sures and wear, and excessive heat gen-eration

For Chlorine Dioxide ♦ Titanium construction for superior corro-

sion resistance (dual seals available with other metallurgy and elastomers on the outboard side of the seal if titanium not required)

♦ Seals designed for pressurized or non-

pressurized operation ♦ Springs are located out of product




Bleaching

Double cartridge seal design Double cartridge seal design for bleaching agentsfor bleaching agents

Hastelloy C276 ® wetted parts for corrosive media Hydraulically balanced seal for even face loading and cooler seal operation One static elastomer Sleeve and gland located out of corrosive product

Single cartridge seal design Single cartridge seal design for bleaching agentsfor bleaching agents

Seal can be operated in pressurized or non-pressurized conditions. Springs are located out of product Double balanced inboard face allows for reverse pressures in upset condi-tions. Hydraulically balanced design with shrouded faces for added protection during operation.




Chlorine Dioxide

Single seal design for Single seal design for Chlorine DioxideChlorine Dioxide

All titanium construction for superior chemical resistance Teflon® jacketed Viton™ elastomers for effective and economical sealing Rotating bellows throws media away from the bellows core Recirculating the discharge maintains product purity

All titanium construction for superior chemical resistance Hydraulically balanced design with shrouded faces for added protection during operation. Springs located out of product Double balanced inboard faces allow for reverse pressure pressures in upset situations Can be operated in pressurized or non-pressurized conditions.

Double seal design for Double seal design for Chlorine DioxideChlorine Dioxide



CASE HISTORY FOR PULP AND PAPERCASE HISTORY FOR PULP AND PAPER——TITANIUM CONSTRUCTIONTITANIUM CONSTRUCTION

A North Carolina pulp and paper mill was pumping chlorine dioxide using Durco Mk II Group II pumps and sealing them with double outside component seals utilizing Kalrez elas-tomers, titanium wetted parts, and an external flush. We eliminated the need for a double component seal by converting the design to an inside single cartridge with complete titanium construction. We designed the seal to recirculate the discharge instead of externally flushing - this process maintained product purity and signifi-cantly reduced the cost of a barrier fluid system . This seal design was first installed in 1993 and has been very successful. The end user was very pleased with the sealing performance, cost of operation and the ease of cartridge instal-lation.




Stock Preparation Paper Machines

The stock preparation and paper ma-chine areas are the heart of the paper mill industry. These areas are responsible for the qualities of brightness, opacity, and strength of the final product. Application concerns include ♦ Packing up of the stuffing box and

the area around the seal ♦ Abrasive stock additives ♦ Water usage during the processes.


Paper Stock (single cartridge) ♦ Beefy spring located out of product to

eliminate clogging ♦ Flush connection keeps fluid circulat-

ing around seal faces ♦ Hydraulically balanced seal design Paper Stock (Fully split cartridge) ♦ Easily converts packed pump, reduc-

ing water usage and maintenance costs

♦ Springs are located out of product ♦ Easy and fast installation Screens and Mixers ♦ Designed for continuous operation ♦ Designed for a variety of suspensions

including bleaching and liquors Designs include ♦ Gyroclean ♦ Beloit Jones ♦ Black Clawson ♦ GL & V

US PATENT #5662340



The Style 85’s easy installation offers significant

time and money savings.

Sealing Advantages The only fully split cartridge design on the market eliminates many component pieces and mishandling of faces. Easily converts a packed pump to a sealed pump. Springs are out of product, minimizing clogging. Universal gland easily fits a majority of pumps and mixers.

Materials of Construction Faces - Carbon Silicon Carbide Elastomers- Viton™ Aflas™ Metallurgy- 316 Stainless Steel Hastelloy-C276® springs

Style 85 Fully Split Cartridge Seal

For Paper Stock Applications




Stock Preparation Paper Machines “Fully Split Cartridge” means the

seal installs as easily as a standard cartridge design with

bolts and set clips. This IS the easiest split seal to install

on the market!

Faces are secured and protected in cartridge halves and can not be mishandled, chipped or cocked.

Springs are protected and out of the product to eliminate

clogging.

Universal gland fits a wide selection of pumps and mixers.

US PATENT #5662340



CCASE HISTORY FOR STYLE 85 / FULLY SPLIT CARTRIDGE SEALASE HISTORY FOR STYLE 85 / FULLY SPLIT CARTRIDGE SEAL A paper mill in Northern Florida had a very difficult time sealing recovered paper stock in its baro-metric pit pump. The main problem with this application was the severe cavitation of the Goulds 3175L pump. The cavitation was so extreme, it destroyed all attempts to use a mechanical seal and the end user finally resorted to using packing. However, the packing was damaging the pump shaft sleeve and the end user was concerned about the time-consuming process of pump disas-sembly. To complicate the situation, the pump was shut off and restarted often. All of these condi-tions posed a harsh environment in which to place a mechanical seal. We were concerned about placing any seal in such a badly cavitating pump, yet the end user was extremely enthusiastic about the patented Flex-A-Seal Style 85 split cartridge seal. At the customer’s insistence, we installed a 4 3/4” Style 85 in the pump. In fact, we installed the seal over the very same packing-damaged sleeve. After seven months of operation, the cavitation problem contin-ued, but the seal continued to operate leak -free. This example is not to encourage the use of any seal in cavitating pump (which is a prime arrange-ment for seal failure) but is an illustration of the reliability of the Style 85 split cartridge seal.



Recommendations for Pulp and Paper Screens

Operation points

− Continuous operation − Shaft sizes from 2” to

5”+ − Potential for bleaching

and liquors in suspen-sion

Standard pressures up to 120 psi Standard speeds 175-1000 rpm Media 0.5—5% paper stock

Screens Are used to sort fibers in digested paper stock. Effective screen-ing separates accept-able fibers from the stock. The remaining stock may be refined to the correct size and resorted through the screens. Pressure screens use pressure to force fibers through screens and a blade is used to scrape material from the screen. Centrifugal screens use centrifugal force to separate and pass fibers through a screen.




Coatings Sizings

Coatings and sizings are used to improve the surface quality of paper once it has gone through the paper machine stage. Some processes are added while the paper is on a machine, some are applied once the paper is dried and rolled. Application concerns include critical consis-tencies of ♦ Starches modified by enzymes or oxida-

tion ♦ Coatings include calcium carbonate, kao-

lin, latex, and titanium dioxide slurries ♦ Caustic system cleaning processes to rid

equipment of bacteria build-up

Our Sealing Advantages Self-sintered silicon carbide versus tungsten carbide faces for abrasive media Hastelloy C-276® bellows material withstands corrosive product properties Hydraulically balanced single and double seal designs to accommodate all types of sealing requirements. Outboard seals on double seals are economi-cally designed with self-sintered silicon carbide vs. carbon face combinations. For our stationary designs - Stationary bellows design provides maximum face contact, even face loading, and optimum tracking Uniform 360º transfer of torque to the primary rotating face provides superior operation in abrasives and viscous liquids

Beefy single spring is located out of

product to eliminate clogging




Coatings Sizings

Seal is hydraulically balanced to minimize face pressure, wear, and excessive heat generation

Flush connection (used as recirculation) maximizes cooling around seal faces

Silicon carbide vs. carbon on OB seals efficiently

and economically

Stationary bellows design maximizes face alignment

and even face loading

Shrouded self-sintered silicon carbide vs. nickel bound tungsten carbide

faces on the IB seal are durable and

protected in abrasive slurries




Recovery

The Recovery stage for Black Liquor consists of three sub-stages Black Liquor Preparation for con-centration to at least 60% solid form Recovery Boiler for electricity, steam generation, and smelt for recausticizing Recausticizing for recovery of NaOH Application concerns include ♦ Various concentrations of Black Liquor

from less than 25% to over 50% ♦ Hot water (<180º) in boiler feed

applications ♦ Condensate ♦ Fuel Oil ♦ Green Liquor ♦ White Liquor ♦ Lime Mud

Our Sealing Advantages For Green Liquor

Rotating bellows - use centrifugal force to ‘self-clean’, throwing product away from bellows core. No springs to break or clog. Retained shrouded face design - pro-vides additional face protection and eliminates troublesome drive pins Static elastomers - eliminate the hang-up of dynamic elastomers

Please refer to these sections for additional information

Pulping and Washing ♦ for additional information on sealing

Black Liquor and White Liquor Boiler Feed ♦ for additional information on sealing

Boiler Feed Applications High Temperature Hydrocarbon ♦ for sealing fuel oil applications




Green Liquor


from bellows core

Tangential connection maximizes

barrier fluid flow.

Tandem design maintains product and barrier fluid on OD of both seals for increased safety and

heat dissipation.


from bellows core

No dynamic elastomers to hang up




Pumping ring effectively circulates fluid for proper

cooling and seal operation

Increased liquid volume around OB seal which allows it to run cooler.



CASE HISTORY FOR PULP AND PAPER - GREEN LIQUOR A paper mill in the Southern USA recently needed a sealing solution for green liquor. Our dual tandem cartridge design provided the answer. The rotating bellows throws media away from the bellows core to prevent clogging. The seal is also designed with no dynamic elastomer to hang up during operation. The retained, shrouded face design protects the sealing surfaces. The pump’s design also gave us ample clearance to create a generous volume of liquid be-tween the seal chamber wall and the rotary portion of the seal to lubricate and cool the seal. The inboard faces utilize the green liquor as face lubrication, minimizing the amount of addi-tional water used during operation (a continuing concern for the pulp and paper industry). This seal was installed earlier this year and is currently in operation.




Wastewater

At the end of the pulp and paper process is treatment of residual wastewater. The EPA’s Cluster Rules for Pulp and Paper Process bring the treatment of all wastewater and effluent to the forefront of mill issues. Compliance to these regulations, in addition to the water consumption throughout the other paper processes in the mill, pose valid economic operating concerns. Many mills resort to packing materials for their sealing needs in these areas. However there are several mechanical seal options that address water consumption and conservation in an eco-nomic and efficient fashion.


Unlike packing, mechanical seals ♦ Do not have an initial adjustment period ♦ Do not have a rigid maintenance sched-

ule ♦ Do not abrade or damage pump shafts

or sleeves ♦ Minimize water consumption and usage ♦ Are designed to handle the strenuous

processes of wastewater treatment ♦ Reduce power consumption Our seals are designed with ♦ Self-sintered silicon carbide vs. nickel-

bound tungsten carbide faces for abra-sive and chemical applications.

♦ Rugged single springs which can not clog or break

♦ Multi-spring designs that are protected and do not see product

♦ Rotating bellows that use centrifugal force to move clogging media away from the bellows core

♦ High axial thrust capabilities for problem




from bellows core

No dynamic elastomers to hang up




Thick, rugged open single spring design eliminates clogging seen in smaller

multi-spring designs

Seal is designed with high axial thrust capabilities.

Rotating face is shrouded for

additional protection from abrasive media


Wastewater




Wastewater “Fully Split Cartridge” means the seal installs as easily as a standard cartridge

design with bolts and set clips

Faces are secured in cartridge halves and can not be mishandled,

chipped or cocked.


clogging.


US PATENT #5662340

Wet Corn Flow Chart



Wet Corn Industry BinderWet Corn Industry Binder

Pull the following sections-

Mixer Section Waste Water Section

Wet Corn Section




Solutions for

Wet Corn Milling

WWet corn milling is a no-waste process. The germ, fiber, starch and gluten are all used, whether in feed products, oils, syrups, cornstarch, or alcohol production. Major concerns the industry must address include ♦ Abrasive slurries ♦ Steepwater tank and hydrolysis acids ♦ Emissions controls including particulate

matter (PM) and volatile organic com-pounds (VOC), sulfur dioxide, and hex-ane

♦ Coking syrups and oils ♦ Maintenance costs associated with pack-

ing material

Engineered Solutions Include Self-sintered silicon carbide versus nickel bound tungsten carbide face combination for abrasive materials such as steepwater and hardening products such as oils. Rotating bellows design for coking medias such as corn oil and mashes. Balanced seal design for pressure fluctuations found in hexane and ethanol processes. Pumping rings to efficiently move fluid. Consultation with engineers to address spe-cific application, pump, and installation needs and concerns.



Solutions for

Wet Corn Milling Steepwater

The steepwater application can be diffi-cult to seal due to the fibrous nature of the media. Stuffing boxes pack up quickly in this environment causing seal failure. It is important to keep fluid circulating around the seal faces and also to address the abrasive condition of the media.

Our Sealing Advantages Durable sealing face combination - Self-sintered silicon carbide versus nickel bound tungsten carbide faces inboard and outboard for abrasive product and grit in product and barrier fluid Fluid connections - Proper piping into gland and stuffing box keeps seal run-ning cool. Bellows or rugged single spring de-sign - to eliminate clogging found in smaller multi-spring designs



Solutions for

Wet Corn Milling Steepwater

In and out connections keep liquid circulating

around the faces.

Hard face combination of nickel bound tungsten carbide versus silicon carbide stands up to the fibrous media on

both the inboard and outboard sides of the seal.

Non-clogging heavy duty back-to-back single spring design. Cooled fluid jacket

provides more effective seal cooling.




SSTEEPWATER PROCESSTEEPWATER PROCESS

The steepwater process poses some unique concerns. The media consistency is stringy and fibrous and can quickly pack up the stuffing box . In this particular situation the customer, a corn processing facility in Canada, was using two component seals to seal their Goulds 3175M pump, the main feed pump from the digester. They did not want to modify the pump and they did not want to use bellows in the applica-tion. In addition, they wanted easy access to the impeller for adjustments. Their current com-ponent arrangement was averaging a seal life of three (3) months. We supplied a back to back multi-spring cartridge, utilizing a barrier fluid in and out to keep liquid circulating around the seal faces. The face combination of nickel bound tungsten car-bide vs. self-sintered silicon carbide both inboard and outboard addressed the abrasiveness of the product and the grit in the barrier fluid. The customer was so pleased with the seal’s operation after one (1) year, they asked us to design similar configurations for their other process pumps.



Solutions for

Wet Corn Milling Corn Oil

Corn oil extracted from the steepwater has it’s own set of sealing concerns. The product has a tendency to ‘coke’ or buildup in the sealing unit and the sub-sequent hardening can damage the seal faces.

Our Sealing Advantages Hydraulically balanced design for 360º transfer of torque for consistent sealing performance No dynamic elastomers to ‘hang up’ in product Rotating bellows design moves product away from bellows core, reducing buildup and coking Self-sintered silicon carbide versus nickel bound tungsten carbide to withstand potential product hardening



Solutions for

Wet Corn Milling Corn Oil

Rotating bellows moves oil away from bellows core, reducing buildup

Durable hard face combination withstands the rigors of hardened product

Hydraulically balanced design for uniform and consistent performance

No dynamic elastomers to hang up in the product




CCORN OIL PROCESSORN OIL PROCESS

After the steepwater soak, the corn germ is separated, washed, dewatered, and dried; the oil is then extracted. Flex-A-Seal applied our standard rotating welded metal bellows car-tridge for a corn oil extraction process in Canada. In this particular application, we addressed the coking potential of the media by using a ro-tating bellows assembly. As the assembly rotates, centrifugal force moves the solids away from the self-cleaning bellows core, eliminating buildup on the bellows. The bellows design also allows uniform 360º transfer of torque to the primary rotating face and is hydraulically balanced. In addition, there are no springs to clog or break. Since hardening solids were an issue, we utilized the durable seal face combination of nickel bound tungsten carbide versus self-sintered silicon carbide. This cartridge design was an economical, easy to install, and effective sealing solution for the customer’s needs.



Solutions for

Wet Corn Milling Emissions

Organic process emissions such as hexane and sulfur dioxide are by-products of wet corn milling. Most plants have ventilation or capture/collection systems in place to address these concerns. Seal design can control and assist these systems at the point of pump emission

Our Sealing Advantages Tandem design - maintains product and barrier fluid pressures, increasing heat dissi-pation and personnel safety. This design also addresses EPA/OSHA standard regulations and addresses the light specific gravity of va-porizing product Balanced inboard faces - allow for reverse pressure fluctuations Integral pumping ring - increases the flow of the cooling barrier fluid by circulating around faces



Solutions for

Wet Corn Milling Emissions

Double balanced inboard faces allow reverse pressure fluctuations.

Tandem design increases safety and heat dissipation by

maintaining fluid on the outside diameter of both inboard and outboard sides.

Incorporated pumping ring improves barrier

fluid cooling.

Tangential connection optimizes barrier fluid flow.

Springs are stationary and protected.




HHEXANE IN CORN OIL PROCESSEXANE IN CORN OIL PROCESS Corn wet milling has numerous points of emission concerns. Hexane, an organic emission from corn oil processing is one of the most common. To address hexane’s light specific gravity and comply with EPA/OSHA regulations, Flex-A-Seal developed the above tandem multi-spring cartridge for a chemical process facility in Texas. The tandem design maintained product and barrier fluid on the outside diameter of both inboard and outboard sides, increasing safety and heat dissipation. The balanced inboard faces allowed for reverse pressure fluctuations. The mineral oil barrier fluid was recirculated through a pressurized reservoir. The integral pumping ring design allowed this fluid to flow around and cool the seal chamber. The lack of abrasives and low operating temperatures enabled us to use a carbon versus self-sintered silicon carbide face com-bination on both the inboard and outboard sides. This is just one of the designs we offer to comply with low emission regulations.



Solutions for

Wet Corn Milling Corn Mash

The soft, pulpy mixture called mash requires specific sealing procedures. The slurry is extremely abrasive, has the tendency to clog and plug multi-spring designs, and can generate ex-cessive heat and seal leakage To successfully seal this media, all the above concerns need to be addressed.

Our Sealing Advantages Rotating bellows - moves clogging prod-uct away from bellows core Tandem design - maintains product and barrier fluid on the outside diameter of both seals for increased heat dissipation. Seal design is not negatively impacted by non-pressurized operation. Integral pumping ring - effectively circu-lates cooling fluid Tangential gland connections - maxi-mizes the barrier fluid’s flow, optimizing it’s cooling effects Rugged face combination - Self-sintered silicon carbide versus nickel bound tung-sten carbide to address the abrasive corn mash slurry



Solutions for

Wet Corn Milling Corn Mash

Pumping ring effectively circulates fluid for proper cooling

Rotating bellows uses centrifugal force to “throw” media away from

bellows core

Tangential connection maximizes the cooling effects of

the barrier fluid

Tandem design maintains product and barrier fluid on the outside diameter of both seals for

increased heat dissipation.

Seals are hydraulically balanced.



CCORN MASH PROCESSORN MASH PROCESS An ethanol plant in the upper Midwest was pumping corn mash at 160ºF using an Allis Chalmers 731+ F4H1 enlarged seal chamber pump. A back to back multi-spring double seal had been installed by the OEM as standard equipment. However, the end user was not pressurizing the seal and the faces opened during operation. They were also experiencing another problem with the barrier fluid (water) reaching excessive temperatures since it was not being cooled. We provided a Style 78 tandem welded bellows cartridge to solve the problem. The tandem design is not negatively affected by the non-pressurized system. This allows the faces to maintain contact regardless of the pressure relationship. The Style 78 also includes a pump-ing ring in the design, effectively circulating and cooling the barrier fluid. By increasing the piping connection from 1/4” to 1/2” we allowed more buffer system flow, cooling the seal faces even more. The OEM-supplied competitor seal lasted 2-4 weeks in the application. Our Style 78 has run over a year without incident. A neighboring ethanol plant also installed several 78s for their mash applications based on this successful situation.




Solutions for

Wet Corn Milling Fine Corn Solids/Starch

Corn starch, whether used as an edible or industrial starch or as an ingredient for dextrin is a finely abrasive media which can clog multi-spring sealing devices. It must be washed and dewatered to remove any residual gluten and solubles. These processes require an effec-tive sealing method to handle the resulting fine slurries.

The Style 85 Fully Split Cartridge Sealing Advantage

Silicon carbide hard face combination effectively handles abrasive media Stationary design is more forgiving of misalignments. Springs are located out of the product, minimizing clogging and breaking Universal gland fits a large selection of pumps and mixers Easily converts a packed pump to a sealed pump, eliminating pump shaft scoring and excessive maintenance.



Solutions for

Wet Corn Milling Fine Corn Solids/Starch

“Fully Split Cartridge” means the seal installs as easily as a standard cartridge design with bolts an set

clips Faces are secured in cartridge

halves and can not be mishandled, chipped or cocked.


clogging.


FFINE CORN SOLIDS PROCESSINE CORN SOLIDS PROCESS A distributor in the Midwest needed to meet the specific needs of their end user. The applica-tion was a water suspension of fine corn solids at 130ºF, 1250 rpm, with a discharge pressure of 140 psi. The customer was adamant about not taking the pump apart for routine seal main-tenance. Flex-A-Seal met this criteria with our patented Style 85 fully split cartridge seal. Our unique de-sign addressed several of their concerns. We met their installation criteria since installation of the Style 85 is simply attaching the two (2) halves over the shaft and mounting on the pump like a standard cartridge. The end user can even make impeller adjustments without removing the seal from the pump. The customer is assured of the integrity of the cartridge design since the seal faces are secured safely in the cartridge halves and are never handled during the in-stallation process. In addition, the cartridge is fully assembled and pressure-tested at our fac-tory to ensure start-up success. The Style 85 springs are placed out of the product, protecting them from the clogging media. The silicon carbide faces were not negatively impacted by the finely abrasive media. This case history is another example of Flex-A-Seal effectively addressing customer concerns.






Solutions for

Wet Corn Milling Corn Syrup

Corn syrup is manufactured by the par-tially hydrolyzing corn starch slurry . This process can incorporate mineral acids, enzymes or a combination of both. The syrup is then refined, concentrated, and cooled. The syrup is thick and heavy, cre-ating a unique sealing challenge in the wet corn mill process.

Our Sealing Advantages Rotating bellows - moves viscous product away from bellows core Integral pumping ring - allows cooler barrier fluid to circulate around seal faces Durable seal face combination - Self sin-tered silicon carbide versus nickel bound tungsten carbide handles the heavy media Tangential outlet port - designed to create maximum flow of barrier fluid



Solutions for

Wet Corn Milling Corn Syrup

Rotating inboard bellows uses centrifugal force to move the viscous product away from

the bellows core.

Incorporated pumping ring design keeps cooler barrier fluid circulating around the seal faces.

Smaller tangential outlet port in conjunction with larger inlet port maximizes circulation

and flow of barrier fluid

The hard face combination of nickel bound tungsten to self sintered silicon

can handle the thick media

↓↓ ↑↑

CCORN SYRUP PROCESSORN SYRUP PROCESS

Corn syrup is one of the final stages of the wet corn milling process. Hydrolysis of the starch slurry into syrup is accomplished by using a combination of enzymes and mineral acids. The Flex-A-Seal’s tandem rotating welded bellows cartridge (Style 78) was the design solution for this particular application. The inboard bellows rotates, using centrifugal force to throw the thick product away from the bellows core. The incorporated pumping ring aids in circulating the barrier fluid. The gland’s larger barrier fluid inlet port and smaller, tangential barrier fluid outlet port maximize this circulation effect. We utilized the sturdy seal face combination of nickel bound tungsten carbide versus self-sintered silicon carbide to handle the product’s viscosity on the inboard side of the seal. Car-bon versus self-sintered silicon carbide was satisfactory for the barrier fluid (water) and was more economical on the outboard side of the seal.






Solutions for

Wet Corn Milling Ethanol

There are several uses for ethanol and the carbon dioxide byproduct ♦ Distillers grain (DDGS) ♦ Fuel ♦ Livestock feed ♦ Corn sweetener ♦ Carbonation for beverages ♦ Flash freezing Production consists of five stages: milling, addition of enzymes, saccharification and fermentation, distillation and dehydration, and by-product recovery.

Our Sealing Advantages Hydraulically balanced design - minimizes face pressures and excessive heat genera-tion. Even face loading/uniform 360º transfer of torque to primary rotating face Economical soft face combination - lack of abrasives and low operating tempera-tures are optimum operating conditions for carbon versus self-sintered silicon carbide faces. Stationary bellows design - provides maxi-mum face alignment and contact. Recirculation connection - maximizes cool-ing around the faces.



Solutions for

Wet Corn Milling Ethanol

Static elastomers do not fret metal surfaces or hang up during operation.

Stationary bellows design provides maximum face

loading and contact.

Flush connection can be utilized for recirculation, maintaining product purity and removing generated

heat from the faces.

Hydraulically balanced design provides uniform 360º of torque to primary rotating face.

Pharmaceutical Flow Chart



Pharmaceutical Industry BinderPharmaceutical Industry Binder

Pharmaceutical Overview High Temperature

High Pressure Cryogenics

Mixers and Agitators Boiler Feed & Condensate

Hermetic Bellows



Application Solutions for the Pharmaceutical Industry

Industry Challenges

♦ Clean Rooms

♦ Product Containment

♦ Raw Material Handling

♦ Emissions Control

♦ Purification and Distillation

♦ Reliability and Safety

♦ Wastewater Treatment

♦ Reliability

Engineered Solutions Include

♦ High Temperature Cartridges

♦ High Pressure Cartridges

♦ Dual Seals for Safety and

Product Integrity

♦ Slurry Seals

♦ Seals for Mixers and Agitators

♦ Rugged Single Springs

♦ Fully Split Cartridge Seals

♦ Cryogenics

♦ Hermetic bellows

Refinery Flow Charts 1 & 2



Refinery BinderRefinery Binder

Emissions Boiler Feed / Condensate

High Pressure High Temperature Hermetic Bellows

Waste Water

distributor flow chart - mechanical seals - flex-a- · pdf fileboiler feed & condensate...

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