errata sheet inverted globe valve applications · ansi b16.5-1988 buttwelding: all asme/ansi...

Errata Sheetfor

Design EWD, EWS, and EWT Valves through 12x8 Inch Size— Form 2376, March 1998and

Design EUD, EUT-2, EWD, and EWT-2 Valves—Form 5329, September 1993

Inverted Globe Valve Applications(Actuator below valve)Due to space restrictions in your application, youmay be required to mount the valve/actuatorassembly in an inverted orientation, with the actuatorpositioned below the valve. If so, the followingprocedures will help you with disassembly andassembly techniques.

WARNING

With the valve/actuator upside down,components may drop duringdisassembly or assembly. Be carefulnot to position yourself below thevalve in the path of falling parts.

To avoid personal injury or propertydamage caused by componentsdropping, follow the instructions onthis errata sheet.

As the bonnet/plug/cage is loweredfrom the valve body, the center ofgravity will be above the lifting points.Take care to prevent the assemblyfrom tipping over as it is lowered.Either leave the actuator attached tothe plug and bonnet, attach straps tothe stem, or provide other means toprevent tipping.

Disassembly1. Provide adequate support to the actuator whileremoving it from the bonnet.

2. Provide adequate support to the bonnet whileremoving the bonnet nuts.

3. Be aware that the bonnet/plug/cage may tip overas they are lowered from the valve body. Makeprovision to prevent tipping.

4. Be aware that the cage and seat ring may notcome out with the bonnet and plug/stem assembly. Ifthis occurs, make provision to support these parts,as they may fall out unexpectedly.

Assembly1. Start this assembly procedure with the plug/stemassembly already installed in the bonnet.

2. Put the gaskets and cage onto the bonnet andplug.

3. Place the seat ring with the seat ring gasket ontothe cage, if applicable with the valve design.

4. Raise this bonnet/plug/cage assembly up into thevalve body. Make provision to prevent tipping ofthese parts as they are being raised into the valvebody.

5. Torque the bonnet nuts.

6. Mount the actuator.

Errata SheetOctober 2001 Inverted Globe Valve Applications

Fisher Marshalltown, Iowa 50158 USACernay 68700 France Sao Paulo 05424 BrazilSingapore 128461

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�Fisher Controls International, Inc. 1999, 2001; All Rights Reserved

Emerson Process Management

www.Fisher.com

Fisher is a mark owned by Fisher Controls International, Inc., a business of Emerson Process Management. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their respective owners.

WhisperFlo� Trim

August 2000

Errata Sheetfor

Design EWD, EWS, and EWT Valves through 12 x 8 Inch SizeForm 2376, February 1996

andDesign EUD, EUT-2, EWD, and EWT-2 Valves through 24 x 20 Inch Size

Form 5329, September 1993

Figure 1. Cutaway Detail of the WhisperFlo� Trim, Valve Body Typical

W6825-1/IL

Fisher Controls WhisperFlo� trim represents state ofthe art solutions for applications that demand ultimateattenuation.Control valves with WhisperFlo cages (figure 1) pro-vide additional attenuation for aerodynamic noise in

very demanding vapor or gas applications with high-pressure drops. A WhisperFlo cage with an appropri-ately sized valve body is designed to reduce the noiselevel up to –40 dBA. For special applications, –50dBA attenuation can be achieved.

WhisperFlo� Trim

2

Table 1. Specifications

Trim Material and Selection

� 410 Stainless Steel� Others per applicationSee appropriate valve body bulletin

Pressure/Temperature Capability

� –20 to 800�F (–29 to 427�C)� Others per applicationSee appropriate valve body bulletin for comple-mentary information

Maximum Pressure Drops

As shown in appropriate valve body bulletin. Alsosee Bulletin 80.3:010 WhisperFlo AerodynamicAttenuation Trims

WhisperFlo Aerodynamic Trim Pressure Rat-ings(1,2)

Up to 1500 psi drop

Velocity Limits

WhisperFlo trim is designed for 0.3 MACH as aninherent outlet velocity limit. Variations higher andlower may be applied per special applications

Flow Characteristic

Linear (restricted linear cages and special, charac-terized cages are available—consult your FisherControls sales office or sales representative)

Rangeability

100:1

Flow Direction

Standard: Flow up—through the seat ring and outthrough the cage orifices

Noise Attenuation

Approximately –40 dBA maximum depending onthe �P/P1 ratio per IEC 534-8-3 calculation proce-dureSee FirstVue� 2.0

Shutoff Classification

� Class IV� Others per applicationSee appropriate valve body bulletin

1. Other pressures on application.2. The pressure/temperature limits in this bulletin and in any applicable standard limitations should not be exceeded.

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Follow standard installation and maintenance proce-dures provided in the appropriate instruction manualfor valves with Whisper Trim� cages.

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Contact your Fisher Controls sales representative orsales office for information.

WhisperFlo� Trim

3

Figure 2. Typical WhisperFlo Trims

DISK SEAT

DESIGN EWD/EWT(METAL SEAT)

DESIGN EWT(SOFT SEAT)

DISKDISK RETAINER

WhisperFlo CAGE

CAGE RETAINER

BONNET SPACER

SEAT RING

SEAT RING

DISK SEATDISKDISK RETAINER

WhisperFlo CAGE

CAGE RETAINER

BONNET SPACER

DESIGN EWD CLASS IV(METAL SEAT)

DESIGN EWT WITHSPRING-LOADED SEAL RING

(SOFT SEAT)

WhisperFlo� Trim

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Figure 3. Typical Design EUT-2/EWT-2 WhisperFlo Trim

CAGE RETAINER

WhisperFlo CAGE

SEAT RING

VALVE PLUG

For information, contact Fisher Controls:Marshalltown, Iowa 50158 USACernay 68700 France Sao Paulo 05424 BrazilSingapore 128461

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Printed in U.S.A.


FirstVue, WhisperFlo, Whisper Trim, Fisher, and Fisher-Rosemount are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. All other marks are theproperty of their respective owners.

D10

2010

X01

2

Design EUD, EUT-2, EWD, andEWT-2 Valves (1)

ContentsIntroduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Scope of Manual 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Specifications 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Packing Lubrication 5. . . . . . . . . . . . . . . . . . . . . . . . . . Packing Maintenance 5. . . . . . . . . . . . . . . . . . . . . . . . .

Replacing Packing 6. . . . . . . . . . . . . . . . . . . . . . . . . . Trim Maintenance 8. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Trim Removal 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lapping Seating Surfaces 9. . . . . . . . . . . . . . . . . . . . Valve Plug Maintenance 9. . . . . . . . . . . . . . . . . . . . . Trim Replacement 11. . . . . . . . . . . . . . . . . . . . . . . .

Parts Ordering 13. . . . . . . . . . . . . . . . . . . . . . . . . . . Parts Reference 13. . . . . . . . . . . . . . . . . . . . . . . . .

Introduction

Scope of ManualThis instruction manual includes installation and main-tenance information for 12 through 24 x 20-inch Class150 through 600 Design EUD, EUT-2, EWD andEWT-2 valves and the 20 x 16-inch Class 900 DesignEWD and EWT-2 valves. (Size designations such as20 x 16 are end connection size x nominal trim size.)

Refer to separate manuals for instructions coveringthe actuator and accessories.

Install, operate, and maintain this valve only if you arequalified through training or experience. If you haveany questions about these instructions, contact yourFisher Controls sales office or sales representativebefore working on this valve.

Figure 1. Typical Design EWT or EWT-2 Valve

W6119/IL

1. See introduction for designs and sizes covered.

Instruction ManualForm 5329September 1993 Design EUD, EUT-2, EWD, and EWT-2

Design EUD, EUT-2, EWD, and EWT-2

2

Table 1. Specifications

Valve Sizes

Designs EUT-2 and EUD: � 12-, � 16-, and� 20-inchDesigns EWT-2 and EWD: � 16x12-, � 20x16-,� 24x16-, and � 24x20-inch valves (size designa-tions are end connection size x nominal trim size)

End Connection Styles

Flanged: ANSI Class 150, 300, 600, and 900(1)

raised-face or ring-type joint flanges per ASME/ANSI B16.5-1988Buttwelding: All ASME/ANSI B16.25-1992 sched-ules through schedule 120 that are compatible withthe ASME/ANSI B16.34-1988 valve body ratingFor other end connections, contact your FisherControls sales office or sales representative for details.

Maximum Inlet Pressure and Temperature (2)

Flanged: Consistent with Class 150, 300, 600, and900(1) pressure-temperature ratings per ASME/ANSI B16.34-1988Buttwelding: Consistent with Class 600 per ASME/ANSI B16.34-1988Also see the Installation section

Shutoff Classifications per ANSI/FCI 70-2-1976(R1990)

Design EUT-2 and EWT-2 with Metal SeatsStandard (for all trims except 2-Stage CavitrolTrim): Class IVStandard (for 2-Stage Cavitrol Trim): Class VOptional (for all trims except 2-Stage Cavitrol Trim):Class VDesign EUT-2 and EWT-2 with Soft Seats:Class V

Shutoff Classifications per ANSI/FCI 70-2-1976(R1990) (Continued)

Design EUD and EWD with Metal SeatsStandard: Class IIIOptional: Class IV

Flow Characteristics

Standard Cages: � Linear or � equal percentageWhisper Trim III and Cavitrol III Cages: Linear

Flow Direction

Standard and Cavitrol III Cages: DownWhisper Trim III Cages: Up

Port Diameters

12-Inch Trim: 11.00 inches (279.4 mm)16-Inch Trim: � 14.75 inches (374.7 mm), � 16.25 inches (412.8 mm) for EUT-2 and EWT-2valves with Whisper Trim III cage20-Inch Trim: � 18.25 inches (463.6 mm) or� 19.75 inches (502 mm) for Design EUT-2 andEWT-2 valves with Whisper Trim III cage

Valve Plug Travel

4 to 15 inches (102 through 381 mm). Contact yourFisher Controls sales office or sales representativefor further details if needed.

Yoke Boss and Stem Diameters

� 5-inch (127 mm) or � 5H-inch (127 mm) diameter yoke boss, each with 1-1/4 inch (31.8 mm)diameter valve stem

Approximate Weights

See table 2

1. Class 900 end connections are available only for 20 x 16-inch Design EWD or EWT-2valves.

2. Do not exceed the pressure or temperature limits in this manual, on the equipmentnameplate, and any applicable code limitations.

DescriptionAll valve types covered in this manual (Design EUD,EUT-2, EWD, and EWT-2 valves) are general-purposevalves that can be used for either throttling or on-offcontrol of a wide variety of liquids and gasses. Theyare single-port, globe-style valves with cage guiding,balanced valve plugs, and a push-down-to-close ac-tion. Design EUT and EWT-2 valves have a spring-loaded PTFE seal between the plug and cage; the Design EUD and EWD valves have two graphite pis-ton rings between the plug and cage. See figure 5 forseal details.

Design EUT-2 and EWT-2 valves have a seat ringthreaded into the cage. A spring-loaded PTFE seal isused to seal between the seat ring and the body.Standard seating is metal to metal, but optional softseats are also available. A typical Design EUT-2 orEWT-2 valve is shown in figure 6.

Design EUD and EWD valves have a seat ring boltedinto the body with cap screws. Seating is metal to met-al. A typical Design EUD or EWD valve is shown infigure 7.


3

Cavitrol� III and Whisper Trim� III cages are availablein these valves. Cavitrol trim eliminates cavitationdamage with liquid in a properly sized valve and Whis-per Trim cages help attenuate aerodynamic noise ingas service.

SpecificationsTypical specifications for these valves are shown intable 1. Some of the specifications for a given valveassembly as it comes from the factory appear on theactuator nameplate if the valve is part of a completecontrol valve assembly.

Installation

WARNING

To avoid personal injury or propertydamage resulting from the sudden re-lease of pressure, do not install thevalve assembly where service condi-tions could exceed the limits given inthis manual or on the appropriate name-plates. Use pressure-relieving devicesas required by government or acceptedindustry codes and good engineeringpractices.

CAUTION

The valve configuration and construc-tion materials were selected to meet par-ticular pressure, temperature, pressuredrop, and controlled fluid conditions.Because some body/trim material com-binations are limited in their pressuredrop and temperature range capabilities,do not apply any other conditions to thevalve without first contacting your Fisher Controls sales office or sales rep-resentative.

If you are hoisting the valve, use nylonslings to protect the surfaces.

Carefully position the slings to preventdamage to the actuator tubing and anyaccessories. Also, take care to preventpeople from being injured in case thehoist or rigging slips unexpectedly. Re-fer to table 1 for valve assemblyweights. It is important to use adequate-ly sized hoists and chains or slings tohandle the valve.

1. Before installing the valve, inspect the valve andassociated equipment for any damage and any foreignmaterial.

2. Make certain that the body interior is clean, thatpipelines are free of foreign material, and the valve isoriented so that pipeline flow is in the same directionas the arrow on the side of the valve.

3. The control valve assembly may be installed in anyorientation unless limited by seismic criteria. However,the normal method is with the actuator vertical abovethe valve. Other positions may result in uneven valveplug and cage wear and in improper operation. Sup-port the actuator if it is not installed in the vertical posi-tion. For more information, consult your Fisher Controls sales office or sales representative.

Note

If the valve being installed has a Whis-per Trim or Cavitrol Trim cage withsmall internal flow passages, consider-ation should be given to installing anupstream strainer to prevent the lodgingof particles in these passages. This isespecially important if the pipeline can-not be thoroughly cleaned or if the flow-ing medium is not clean.

4. Use accepted piping and welding practices wheninstalling the valve in the line. You can leave internalelastomeric parts in place when welding. For flangedvalves, use a suitable gasket between the valve andpipeline flanges.

Note

Depending on valve body materialsused, post weld heat treating might berequired. If so, damage to internal elas-tomeric and plastic parts, as well as in-ternal metal parts is possible. Shrunk-fitpieces and threaded connections mightalso loosen. In general, if post weld heattreating is to be performed, all trim partsshould be removed. Contact your FisherControls sales office or representativefor additional information.

5. With a leak-off bonnet construction, remove the1/4-inch NPT pipe plugs (key 14, figure 4) from thebonnet to hook up the leak-off piping.

6. If continuous operation is required during inspec-tion or maintenance, install a three-valve bypassaround the control valve assembly.

7. If the actuator and valve are shipped separately,refer to the actuator mounting procedure in the ap-propriate actuator instruction manual.


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WARNING

Personal injury could result from pack-ing leakage. Valve packing was tight-ened before shipment; however somereadjustment will be required to meetspecific service conditions.

If the valve has ENVIRO-SEAL� live-loaded packingor HIGH-SEAL� Heavy-Duty live-loaded packinginstalled, this initial re-adjustment will probably not berequired. See the Fisher Controls instruction manualstitled ENVIRO-SEAL Packing System for Sliding-StemValves or Heavy-Duty Live-Loaded Packing System(as appropriate) for packing instructions.

MaintenanceValve parts are subject to normal wear and must beinspected and replaced as necessary. Inspection andmaintenance frequency depends on the severity ofservice conditions. This section includes instructionsfor packing lubrication, packing maintenance, trimmaintenance, lapping seating surfaces, and valve plugmaintenance. All maintenance operations may be per-formed with the valve in the line.

WARNING

Avoid personal injury from sudden re-lease of process pressure. Before per-forming any maintenance operations:

� Disconnect any operating lines pro-viding air pressure, electric power, or acontrol signal to the actuator. Be surethe actuator cannot suddenly open orclose the valve.

� Use bypass valves or completelyshut off the process to isolate the valvefrom process pressure. Relieve processpressure on both sides of the valve.Drain the process media from bothsides of the valve.

� Vent the power actuator loadingpressure and relieve any actuator springprecompression.

� Use lock-out procedures to be surethat the above measures stay in effectwhile you work on the equipment.

Figure 2. Lubricator and Lubricator/Isolating Valve

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10A9421-AAJ5428-DA0832-2/IL

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1. Isolate the control valve from the line pressure, re-lease pressure from both sides of the valve body, anddrain the process media from both sides of the valve.If using a power actuator, also shut off all pressurelines to the power actuator, release all pressure fromthe actuator, and use lock-out procedures to preventinjury while you work on the equipment.

Note

Whenever a gasket seal is disturbed byremoving or shifting gasketed parts, anew gasket should be installed uponreassembly. This is necessary to ensurea good gasket seal because the usedgasket might not seal properly.

Because of the care Fisher Controls takes in meetingall manufacturing requirements (heat treating, dimen-sional tolerances, etc.), use only replacement partsmanufactured or furnished by Fisher Controls.

Note

If the valve has ENVIRO-SEAL � live-loaded packing or HIGH-SEAL � Heavy-Duty live-loaded packing installed, seethe Fisher Controls instruction manualstitled ENVIRO-SEAL Packing System forsliding-stem valves or Heavy-Duty Live-Loaded Packing System (as appropriate)for packing instructions.

ENVIRO-SEAL and High-Seal are marks owned by Fisher Controls International, Inc.


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Figure 3. Typical PackingB2398/IL

Packing Lubrication

If a lubricator or lubricator/isolating valve (figure 2) isprovided for PTFE/composition or other packings thatrequire lubrication, it will be installed in place of the1/4-inch NPT pipe plug (key 14, figure 4). Use a sili-con-base lubricant. To operate the lubricator, turn thecap screw clockwise to force the lubricant into thepacking box. The lubricator/isolating valve operates

the same way except the isolating valve must first beopened and then closed after lubrication is completed.

Packing MaintenanceThis procedure does not cover ENVIRO-SEAL orHigh-Seal packing; refer to separate manuals for instructions on those packing types.


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Figure 3. Typical Packing (Continued)A6060/IL

Key numbers are shown in figure 3 unless otherwiseindicated.

For spring-loaded single PTFE V-ring packing, thespring (key 8) maintains a sealing force on the pack-ing. If leakage is noted around the packing follower(key 13), check to be sure the shoulder on the packingfollower is touching the bonnet. If the shoulder is nottouching the bonnet, tighten the packing flange nuts(key 5, figure 4) until the shoulder is against the bon-net. If leakage cannot be stopped in this manner, pro-ceed to the Replacing Packing section.

If there is undesirable packing leakage with other thanspring-loaded packing, first try to limit the leakage andestablish a stem seal by tightening the packing flangenuts.

If the packing is relatively new and tight on the stemand if tightening the packing flange nuts does not stopthe leakage, it is possible that the valve stem is wornor nicked so that a seal cannot be made. The surfacefinish of a new valve stem is critical for making a goodpacking seal. If the leakage comes from the outsidediameter of the packing, it is possible that the leakageis caused by nicks or scratches around the packingbox wall. If performing any of the following procedures,inspect the valve stem and packing box wall for nicksand scratches.

Replacing Packing1. Isolate the control valve from the line pressure, re-lease pressure from both sides of the valve body, anddrain the process media from both sides of the valve.If using a power actuator, also shut off all pressurelines to the power actuator, release all pressure from

the actuator, and use lock-out procedures to preventinjury while you work on the equipment.

2. Remove any leak-off piping from the bonnet. Dis-connect the stem connector, and then remove the ac-tuator from the valve by unscrewing the hex nuts (key 26, figure 4).

3. Loosen the packing flange nuts (key 5, figure 4) sothat the packing is not tight on the valve stem. Re-move any travel indicator parts and stem locknutsfrom the valve stem threads.

CAUTION

Avoid damage to the seating surfacescaused by the valve plug and stem as-sembly dropping from the bonnet afterbeing lifted part way out.

When lifting the bonnet (key 1, figure 4),either be sure that the valve plug andstem assembly remains in the valve andon the seat or, temporarily install a valvestem locknut on the valve stem. Thislocknut will prevent the valve plug andstem assembly from dropping out of thebonnet.

WARNING

To avoid personal injury or propertydamage caused by uncontrolled move-ment of the bonnet, loosen the bonnetby following the instructions in the nextstep. Do not remove a stuck bonnet bypulling on it with equipment that canstretch or store energy in any other


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Figure 4. Typical Globe Valve Bonnet

CU4317 / IL

manner. The sudden release of storedenergy can cause uncontrolled move-ment of the bonnet. If the cage sticks tothe bonnet, proceed carefully with bon-net removal.

Note

The following step also provides addi-tional assurance that the valve bodyfluid pressure has been relieved.

4. Hex nuts (key 16, figures 6 or 7) attach the bonnetto the body. Loosen these nuts or cap screws approxi-mately 1/8 inch (3 mm). Then loosen the body-to-bonnet gasketed joint by either rocking the bonnet orprying between the bonnet and body. Work the pryingtool around the bonnet until the bonnet loosens. If nofluid leaks from the joint, remove the nuts completelyand carefully lift the bonnet (key 1, figure 4).

5. Set the bonnet on a protective surface to preventdamage to the bonnet gasket surface.

6. Whenever the bonnet has been removed, replacethe bonnet gasket and the cage gasket (keys 10 and11, figure 6 and 7). Remove the bonnet gasket.

7. Lift the valve plug and stem assembly out of thevalve body and set it on a protective surface. If thevalve plug is to be reused, protect the valve plug seat-ing surface to prevent scratches.

8. Install screws or bolts into the tapped holes in thetop of the cage assembly (key 3), and carefully lift itout of the body. Remove the cage gasket (key 11).

9. If further trim maintenance is required, refer to theTrim Maintenance section.

10. Cover the opening in the valve body to protect thegasket surface and prevent foreign material from get-ting into the valve cavity.

11. Remove the packing flange nuts, packing flange,upper wiper, and packing follower (keys 5, 3, 12, and13, figure 4). Carefully push out all the remainingpacking parts from the valve side of the bonnet usinga rounded rod or other tool that will not scratch thepacking box wall. Clean the packing box and the metalpacking parts.

12. Inspect the valve stem threads and packing boxsurfaces for any sharp edges that might cut the pack-ing. Scratches or burrs could cause packing box leakage or damage to the new packing. If the surfacecondition cannot be improved by light sanding or


8

honing with a tool similar to an automotive brake-cylin-der hone, replace the damaged parts.

13. Remove the covering protecting the valve cavity,and install a new cage gasket (key 11, figure 6 and 7),making sure the gasket seating surfaces are clean andsmooth.

14. Re-install the trim parts by following the Trim Replacement section. Install a new bonnet gasket (key 10, figure 6 and 7).

Note

Proper performance of the tighteningprocedures in step 15 compresses thebonnet and cage gaskets (keys 10 and11, figure 6 and 7) enough to seal thebody-to-bonnet joint.

The bolting procedures in step 15 inclu-de—but are not limited to —ensuringthat bolting threads are clean and even-ly tightening the hex nuts onto thestuds in a crisscross pattern. Becauseof the boltup characteristics of the gas-kets, tightening one nut may loosen anadjacent nut. Repeat the crisscrosstightening pattern several times untileach nut is tight and the body-to-bonnetseal is made.

15. Lubricate the stud bolts (key 15, figure 6 and 7)with Never-Seez(2) Nickel Special lubricant or equiva-lent, slide the bonnet over the stem and onto the bolts,and secure with the stud bolt nuts (key 16, figure 6and 7), using accepted bolting procedures during tight-ening so that the body-to-bonnet joint will withstandtest pressures and application service conditions. Re-fer to the following table for bolting torque guidelines.

VALVE SIZE, VALVE BOLTING TORQUE(1)VALVE SIZE,INCHES

VALVECLASS Lbf �ft N�m

12, 16 x 1216

20 x 16, 24 x 1620 x 16

20, 24 x 20

150 - 600150 - 600150 - 600

900150 - 600

129020702070920

3130

17502800280012504240

1. For B7, B7M, B16, and 660 bolting materials.

16. Install new packing and the metal packing boxparts according to the appropriate arrangement in figure 3. Place a smooth-edged pipe over the valvestem, and gently tap each soft packing part into thepacking box one piece at a time, being sure that air isnot trapped between adjacent soft parts.

17. Slide the packing follower, upper wiper, and pack-ing flange (keys 13, 12, and 3, figure 4) into position.Lubricate the packing flange studs (key 4, figure 4)and the faces of the packing flange nuts (key 5, figure 4). Replace the packing flange nuts.

18. For spring-loaded PTFE V-ring packing , tight-en the packing flange nuts until the shoulder on thepacking follower (key 13, figure 4) contacts the bon-net.

For graphite packing , tighten the packing flange nutsto the maximum recommended torque shown in thetable below. Then, loosen the packing flange nuts andretighten them to the recommended minimum torqueshown in the table.

For other packing types , tighten the packing flangenuts alternately in small, equal increments until one ofthe nuts reaches the minimum recommended torqueshown in the table below. Then, tighten the remainingflange nut until the packing flange (key 3, figure 4) isat a 90-degree angle to the valve stem.

Packing Flange Nut Torque for Packing Without a Spring

VALVESTEM ANSI

GRAPHITE-TYPEPACKING

PTFE-TYPEPACKING

STEMDIAMETER

ANSICLASS

MinimumTorque

MaximumTorque

MinimumTorque

MaximumTorque

In. mm Lbf�ft N�m Lbf�ft N�m Lbf�ft N�m Lbf�ft N�m

1-1/4 31.8150 & 300

600900

290400490

334556

430590730

496783

140190240

162127

220290360

253341

19. Mount the actuator on the valve assembly, andreconnect the actuator and valve stem according tothe procedure in the appropriate actuator instructionmanual. Check for leakage around the packing follow-er when the valve is being put into service. Retightenthe packing flange nuts as required.

Trim Maintenance

Trim RemovalExcept where indicated, key numbers in this sectionare shown in figure 6 for Design EUT-2 and EWT-2valves and in figure 7 for Design EUD and EWDvalves.

1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body,and drain the process media from both sides of thevalve. If using a power actuator, also shut off all pres-sure lines to the power actuator, release all pressurefrom the actuator, and use lock-out procedures to pre-vent injury while you work on the equipment.

2. Remove the actuator and the bonnet according tosteps 2 through 5 of the Replacing Packing Section.

CAUTION

Use care to avoid damaging gasket surfaces.

The surface finish of the valve stem(key 7) is critical for making a good

2. Mark owned by Never-Seez Corp.


9

packing seal. The inside surface of thecage or cage assembly (key 3) is criticalfor smooth operation of the valve plugand for making a seal with the seal ring(key 28). The seating surfaces of thevalve plug (key 2) and seat ring (key 9)are critical for proper shutoff. Assumeall these parts are in good condition,and protect them accordingly unless in-spection reveals otherwise.

3. Packing parts can be removed if desired. Replacethese parts as described in the Packing Replacementsection.

4. Lift the valve plug and stem assembly out of thevalve body and set it on a protective surface. If thevalve plug is to be reused, protect the valve plug seat-ing surface to prevent scratches.

5. Install screws or bolts into the tapped holes in thetop of the cage assembly (key 3), and carefully lift itout of the body. Remove the gaskets (keys 10 and 11).

6. Proceed as appropriate:

For Design EUT-2 or EWT-2 valves (figure 6) , thevalve has a seat ring seal ring (key 6). Inspect thisseal ring, and remove it if replacement is necessary.The seat ring is screwed into the cage and securedwith two tack welds, one on each side of the cage.Remove the tack welds by grinding or filing them off.

For all sizes except the 12- and 16 x 12-inchsizes, there are slots cut in the seat ring. Insert a bar through the slots and turn theseat ring out of the cage.

For the 12- and 16 x 12-inch sizes, there aretwo 3/8-inch UNC tapped holes in the bot-tom of the seat ring. Screw cap screws intothese holes. Use a bar to pry against the capscrews and turn the seat ring out of thecage.

For Design EUD and EWD valves (figure 7) , unscrew the seat ring cap screws (key 49). Installscrews or bolts into the tapped holes in the top of theseat ring (key 9) and carefully lift it out of the valvebody. Remove the gasket (key 13).

7. Inspect parts for wear or damage that would pre-vent proper operation of the valve. Replace or repairtrim parts according to the following Lapping SeatingSurfaces or Valve Plug Maintenance procedures asappropriate.

Lapping Seating SurfacesA certain amount of leakage should be expected withmetal-to-metal seating in any valve body. If the leak-age becomes excessive, however, the condition of theseating surfaces of the valve plug and seat ring can beimproved by lapping. (Deep nicks should be machinedout rather than ground out.) Use a good quality lappingcompound of a mixture of 280 to 600-grit. Apply thecompound to the bottom of the valve plug.

Assemble the valve to the extent that the cage or cageassembly is in place and the bonnet bolted to thebody. A simple handle can be made from a piece ofstrap iron locked to the valve plug stem with nuts. Rotate the handle alternately in each direction to lapthe seats. After lapping, remove the bonnet, and cleanthe seat surfaces. Completely assemble the valve asdescribed in the Trim Replacement section, and testthe valve for shutoff. Repeat the lapping procedure ifleakage is still excessive.

Valve Plug MaintenanceExcept where indicated, key numbers in this sectionare shown in figure 6 for Design EUT-2 and EWT-2valves and in figure 7 for Design EUD and EWDvalves.

CAUTION

For valves with a PTFE seal ring (figure 5) if replacing the valve plug sealring (key 28), be careful not to scratchthe surfaces of the ring groove in thevalve plug or any of the surfaces of thereplacement ring, or the replacementring may not seal properly.

1. Remove the valve plug (key 2) according to theDisassembly section.

2. For seal-ring constructions , carefully pry or cutthe seal ring (key 28, figure 5) from its groove in theplug.

Install the replacement spring-loaded seal ring with theopen side facing the top or bottom of the valve plug,depending on flow direction. The open side of the sealring should face up (toward the actuator) in flow-upinstallations and down in flow-down installations.

To install the seal ring, first lubricate it with general-purpose, lithium-base lubricant. Then gently stretchthe seal ring and work it over the top edge of the valveplug. Give the PTFE material in the seal ring time tocold flow during the stretching procedure. Avoid jerk-ing sharply on the ring. Stretching the seal ring overthe valve plug might make it seem loose when it is in


10

Figure 5. Seal Ring and Piston Ring Details

B2425 / IL

the groove, but it will shrink to its original size after youhave installed the plug into the cage.

3. For piston-ring constructions , each of the pistonrings (key 28, figure 5) is in two pieces; remove thepieces.

Each new graphite piston ring is furnished as a com-plete ring, and each must be broken into two approxi-mately equal portions. Do this by placing the ring onedge on a smooth, hard surface and striking the ringquarely with a hammer. Be sure to match the broken

ends when installing the ring sections in the valve pluggrooves.

CAUTION

Never reuse an old stem (key 7) with anew valve plug. Using an old stem witha new plug requires drilling a newgroove pin hole in the stem. This weak-ens the stem and may cause it to fail inservice. However, a used valve plug maybe reused with a new stem.


11

B2399 / IL

Figure 6. Typical Design EUT-2 or EWT-2 Valve

4. To replace the valve stem (key 7), drill out thegroove pin (key 8) and unscrew the stem from thevalve plug.

5. Screw the new stem tightly into the valve plug. Drillthrough the stem, using a 1/4-inch diameter drill forthe 1-1/4 inch (31.8 mm) stem diameter used in thisvalve. Use the hole in the valve plug as a guide. Re-move any chips or burrs, and drive in a new groovepin to lock the assembly.

Trim Replacement

Except where indicated, key numbers are shown infigure 6 and 7.

1. Proceed as appropriate:

For EUT-2 or EWT-2 valves:

For all sizes except 12- and 16 x 12-inch sizes, turnthe seat ring (key 9) into the cage (key 3) with a barinserted through the seat ring slots.

For 12- and 16 x 12-inch sizes, insert cap screws inthe two 3/8-inch tapped holes in the bottom of the seatring (key 9). Use a bar to pry against the cap screwsand trun the seat ring (key 9) into the cage (key 3).

For all sizes, tack weld the seat ring to the cage usingminimal heat. Two welds, 1/4-inch (6 mm) long and180 degrees apart, are required. Install the seat ringseal ring (key 6) so that its open side faces the valvestem for Cavitrol III trim. Reverse the seal ring forWhisper Trim III cages. Lubricate the seal ring with ageneral-purpose, lithium-base lubricant, and place it


12

B2411 / IL

Figure 7. Typical EUD Valve

over the bottom end of the seat ring. Start the ring inthe groove on one side of the seat ring, and gentlywork it over the seat ring.

For Design EUD and EWD valves (figure 6) , installthe seat ring gasket (key 13).

Temporarily install screws or bolts into the tappedholes in the seat ring (key 9), making sure the seatingsurface is facing up. Lower the seat ring into the valvebody. Remove the temporary screws or bolts.

Secure the seat ring (key 9) with the cap screws(key 49). Tighten the cap screws in a criss-cross pat-tern to a torque of 29 lbf�ft (39 N�m) for 12- and 16 x12-inch valves and to 68 lbf�ft (92 N�m) for 16-through 24 x 20-inch valves.

2. Install a cage gasket (key 11) into the valve. Tem-porarily install screws or bolts into the tapped holes inthe top of the cage assembly (key 3) to help whileinstalling this piece into the valve. Any rotational orien-tation of the cage or assembly with respect to thevalve is acceptable.

For Design EUT-2 and EWT-2 valves , use care toavoid damaging the seat ring seal ring and cage seat-


13

ing surfaces while handling the heavy parts. To helpinsert the cage or assembly into the valve, lubricatethe outside diameter of the seat ring seal ring with Molylube(3) 80 or equivalent.

3. Slide the valve plug (key 2) and stem assembly intothe cage.

For designs with a seal ring, make sure the valve plugseal ring (key 28) is evenly engaged in the entrancechamfer at the top of the cage or cage assembly toavoid damaging the ring.

For Designs with piston rings, make sure the rings arefully engaged into the piston ring groove and flush withthe outside diameter of the plug.

4. Install bonnet gasket (key 10).

CAUTION

If the packing is to be reused and wasnot removed from the bonnet, use carewhen installing the bonnet to avoiddamaging the packing with the valvestem threads.

5. Mount the bonnet on the valve, and complete as-sembly according to steps 15 through 19 of the Replacing Packing section, omitting steps 16 and 17 ifnew packing is not being installed and being sure toobserve the note before step 15.

Parts OrderingEach body-bonnet assembly is assigned a serial num-ber, which can be found on the valve. This same num-ber also appears on the actuator nameplate when thevalve is shipped from the factory as part of a controlvalve assembly. Refer to the serial number when con-tacting your Fisher Controls sales office or sales rep-resentative for technical assistance. When orderingreplacement parts, refer to the serial number and tothe key number and part name from the following list.Specify the desired material, if known. Part numbersare shown below for packing box parts. Specify thepart number if you are ordering packing parts.

Parts ReferenceKey Description Part Number

Valve Body1 Valve Body2* Valve Plug3* Cage6* Seat Ring Seal (Design EUT-2 & EWT-2 Valves Only)

Key Description Part Number

7* Valve Plug Stem8* Groove Pin9* Seat Ring10* Bonnet Gasket11* Cage Gasket13* Seat Ring Gasket (Design EUD and

EWT valves only)15 Stud16 Hex Nut

17 Drain Plug28* Seal Ring (Design EUT-2 and EWT-2

valves only)28* Piston Ring (2 req’d) (Design EUD and EWD

valves only)49* Cap Screw (Design EUD and EWD valves only)

Bonnet1 Valve Bonnet3 Packing Box Flange4 Packing Flange Stud (2 req’d)5 Packing Flange Nut (2 req’d)

PTFE V-Ring Packing6* Packing Set, PTFE (1 req’d) for single

packing; 2 req’d for double packing) 1R2908 010128 Spring, stainless steel (single packing

only) 1D3874 370128 Lantern Ring, stainless steel (double

packing only) 0W0871 3507210 Special Washer, stainless steel (single

packing only) 1H9959 36042

PTFE/Composition Packing7* Packing Ring, PTFE/compositon (8 req’d) 1D7520 X00128 Lantern Ring, stainless steel 0W0871 35072

Graphite Ribbon/Filament Packing7* Packing Ring, Graphite Ribbon (2 req’d for

single packing; 3 req’d for doublepacking) 1V5666 X0022

7* Packing Ring, Graphite Filament (3 req’dfor single packing; 3 req’d for doublepacking) 1D7520 X0162

8 Lantern Ring, stainless steel (2 req’dfor single packing; 1 req’d for doublepacking) 0W0871 35072

11 Packing Box Ring

12* Upper Wiper, Felt (PTFE packings only) 1J8730 0633213 Packing Follower14 Pipe Plug25 Cap Screw (8 req’d)

26 Hex Nut (8 req’d)

3. Mark owned by Bel-Ray Co., Inc.


14

Table 2. Approximate WeightsEND

CONNECTIONAPPROXIMATE

WEIGHT

Size, Inches Type(1) lb kg

RF3100 1410

12 RTJ3100 1410

12BW 2700 1220

RF3800 1720

16 x 12 RTJ3800 1720

16 x 12BW 3200 1450

RF5600 2540

16 RTJ5600 2540

16BW 5000 2270

20 x 16RF

7800 354020 x 16Class 600

RTJ7800 3540

Class 600BW 6900 3130

20 x 16 RF8200 3720

20 x 16Class 900 RTJ

8200 3720

RF11 500 5220

20 RTJ11,500 5220

20BW 10,600 4810

RF11 500 5220

24 x 16 RTJ11,500 5220

24 x 16BW 10,200 4630

RF17 000 7710

24 x 20 RTJ17,000 7710

24 x 20BW 15,700 7120

1. RF—raised face; RTJ—ring-type joint; BW—buttwelding.

For information, contact Fisher Controls:Marshalltown, Iowa 50158 USACernay 68700 France Sao Paulo 05424 BrazilSingapore 128461

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, expressor implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

Printed in U.S.A.


Cavitrol, Whisper Trim, Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc.All other marks are the property of their respective owners.This product may be covered under either one or more of the following patents (5,129,625 and 5,056,757) or under pendingpatent applications.

errata sheet inverted globe valve applications · ansi b16.5-1988 buttwelding: all asme/ansi...

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