860 and 960 Series Spring-Loaded Pressure/ Vacuum Relief Valve (ATEX Approved)Table of ContentsIntroduction ..................................................................1Specifications ..............................................................2Product Identification and Marking ..............................4Principle of Operation ..................................................4Installation ...................................................................5Maintenance ................................................................7Weight Information ....................................................10Valve Repair ..............................................................10Parts Ordering ...........................................................10Parts List ................................................................... 11

! WARNING

Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion, fire and/or chemical contamination causing property damage and personal injury or death.

Enardo spring-loaded pressure/vacuum relief valve must be installed, operated and maintained in accordance with federal, state and local codes, rules and regulations, and Emerson Process Management Regulator Technologies Tulsa, LLC (Emerson) instructions.Failure to correct trouble could result in a hazardous condition. Call a qualified service person to service the unit. Installation, operation and maintenance procedures performed by unqualified person may result in improper adjustment and unsafe operation. Either condition may result in equipment damage or personal injury. Only a qualified person shall install or service the spring-loaded pressure/vacuum relief valve.

Figure 1. Model 860 Spring-Loaded Pressure/ Vacuum Relief Valve

Figure 2. Model 960 Spring-Loaded Pressure/ Vacuum Relief Valve

Introduction

Scope of the ManualThis Instruction Manual provides instructions for installation, maintenance and parts ordering information for the 860 and 960 Series spring-loaded pressure/vacuum relief valve (SL-PVRV).

Instruction ManualD103813X012

October 2017

860 and 960 Series

Nor

th A

mer

ica

Onl

y

SpecificationsThe Specifications section on this page provides specifications for the 860 and 960 Series spring-loaded pressure/vacuum relief valve. Specification is stamped on the nameplate attached to the relief valve. Refer to Product Identification and Marking section for the nameplate details.

Available Construction See Figure 3Inlet Connection Sizes 2 through 6 in. / 50 through 150 mmPressure Ranges(1)(2)

0.5 to 15.0 psi 0.5 to 32.0 oz./sq. in. 1.0 to 55.0 in. w.c. 2.0 to 138 mbarVacuum Pressure Ranges(1)(2)

0.5 to 15.0 psi 0.5 to 32.0 oz./sq. in. 1.0 to 55.0 in. w.c. 2.0 to 138 mbar

Construction Materials Housing: Aluminum, Stainless steel or

Carbon steel Seat / Pallet: Polyphenylene Sulfide (PPS) or 316

Stainless steel (standard above 5 psi) Pallet Seal: Buna-N, FEP Teflon® or Viton®

Hardware: Zinc plated carbon steel or Stainless steel

Weights: Zinc plated carbon steel, Stainless steel or Lead

Gaskets: Buna-N, Teflon® or Viton®

Certification EN 13463-1 EN 13463-5

1. The pressure limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.2. Pressure or vacuum setting has an increment of 0.5 psi, 0.5 oz./sq. in., 0.5 in. w.c. or 2.2 mbar.

Teflon® and Viton® are marks owned by E. I. du Pont de Nemours and Company.

Figure 3. Pressure/Vacuum Relief Valve Model Number

MODEL 860 SPRING-LOADED PRESSURE/VACUUM RELIEF VALVE MODEL NUMBER

860 - X - - / -

MODEL 960 SPRING-LOADED PRESSURE/VACUUM RELIEF VALVE MODEL NUMBER

960 - - - / -

InletConnection

Size(2 through

6 in.)

OutletConnection

Size(3 through

8 in.)

Housing Material

1 = Aluminum2 = Stainless

Steel3 = Carbon

Steel

Pallet and Seat Ring Material

1 = Advanced Composite-Polyphenylene Sulfide (PPS)

2 = 316 Stainless Steel3 = Other

Pallet Seal Material

1 = FEP Teflon®

2 = Buna-N3 = Viton®

4 = Other

Pressure Settingsp = psigz = oz./sq. in.n = in. w.c.

0.5 to 15.0 psi(0.5 psiincrements)

0.5 to 32.0 oz./sq. in.(0.5 oz./sq. in.increments)

1.0 to55.0 in. w.c.(0.5 in. w.c.increments)

Vacuum Settingsp = psigz = oz./sq. in.n = in. w.c.

0.5 to 15.0 psi(0.5 psiincrements)

0.5 to 32.0 oz./sq. in.(0.5 oz./sq. in.increments)

1.0 to55.0 in. w.c.(0.5 in. w.c.increments)

OptionsO = No OptionsA = Special CoatingB = Stainless steel

WeightsC = Optional Weight

MaterialD = Optional HardwareE = Optional Gasket

MaterialG = Steam Jacket

or TraceH = Other

InletConnection

Size(2 through

6 in.)

HousingMaterial

1 = Aluminum2 = Stainless

Steel3 = Carbon

Steel

Pallet and SeatRing Material

1 = Advanced Composite-Polyphenylene Sulfide (PPS)

2 = 316 Stainless Steel

3 = Other

Pallet Seal Material

1 = FEP Teflon®

2 = Buna-N3 = Viton®

4 = Other

Pressure Settingsp = psigz = oz./sq. in.n = in. w.c.

0.5 to 15.0 psi(0.5 psiincrements)

0.5 to32.0 oz./sq. in.(0.5 oz./sq. in.increments)

1.0 to55.0 in. w.c.(0.5 in. w.c.increments)

Vacuum Settingsp = psigz = oz./sq. in.n = in. w.c.

0.5 to 15.0 psi(0.5 psiincrements)

0.5 to32.0 oz./sq. in.(0.5 oz./sq. in.increments)

1.0 to55.0 in. w.c.(0.5 in. w.c.increments)

OptionsO = No OptionsA = Special CoatingB = Stainless steel WeightsC = Optional Weight

MaterialD = Optional HardwareE = Optional Gasket

MaterialG = Steam Jacket

or TraceH = Other

2

860 and 960 Series

Nor

th A

mer

ica

Onl

y

Product DescriptionThe 860 and 960 Series spring-loaded pressure/vacuum relief valves are designed to handle higher pressure settings than standard dead weight-loaded valves.The 860 Series is used for pipe-away aplications while 960 Series is used for vent-to-atmosphere applications. Enardo spring-loaded line are designed for pressures up to 15 psig for tanks with higher maximum allowable working pressures.

With proper installation, usage and preventative maintenance, the 860 and 960 Series can supply many years of pressure/vacuum relief with continuous sealing abilities that exceed the most stringent industry standards (1 SCFH at 90% set point per valve). Spring-loaded pressure/vacuum relief valves have the option of weight-loaded pallets in either the vacuum or pressure portion of the valve. The following is the list of the available spring-loaded pressure/vacuum relief valve models. See Figure 4.

• Model 860: Pressure/Vacuum Relief Valve - Pipe-Away

• Model 861: Top Mount Pressure or Side Mount Vacuum Relief Valve - Pipe-Away

• Model 960: Pressure/Vacuum Relief Valve - Vent-to-Atmosphere

• Model 961: Pressure Relief Valve - Vent-to-Atmosphere

• Model 962: Top Mount Vacuum Relief Valve - End of Line

• Model 963: Side Mount Vacuum Relief Valve

Figure 4. 860 and 960 Series Spring-Loaded Pressure/Vacuum Relief Valve Available Models

MODEL 860 MODEL 861 MODEL 960

MODEL 961 MODEL 962 MODEL 963

3

860 and 960 Series

Nor

th A

mer

ica

Onl

y

Product Identification and MarkingHazardous LocationsEnardo spring-loaded pressure/vacuum relief valves are available with outer housings of carbon steel, stainless steel or aluminum, as indicated in Figure 5.

NameplateA nameplate is attached to the valve and contains the following information:• Model Number – Ex. SL-PVRV, 860- 3X4-42X-X/X• Conn. Flange Size and Rating – Ex. 4 in. • Serial Number• Tag Number (Optional)• Notified Body Number – Ex. 0575• Cat. No. (Category Number) –

Ex. II 1 G c T6 or II 2 G c T6• Year• Cert. No. (Certificate Number) – Ex. 19407X• Pressure

- Setting – Ex. Z4.0 - Flow Rate SCFH (Air) – Ex. 55000• Vacuum

- Setting – Ex. Z0.5 - Flow Rate SCFH (Air) – Ex. 25000

Principle of OperationThe Enardo spring-loaded pressure/vacuum relief valve maintains a tight seal, until system pressure or vacuum exceeds the set pressure of the valve. Set pressure is established by the force of a spring or a set of multiple springs acting on the valve pallet. When the system pressure is above the set pressure, the pallet starts to lift, breaking the seal between the seat and pallet. This allows vapors to pass through the valve orifice and relieve pressure buildup. The valve reseals upon relief and remains sealed.

Relieving vapors near the set pressure in a continuous manner may cause the pallet to flutter or oscillate inside the valve chamber. This is common to products of this model. Operating the valve with flutter or oscillation may cause premature valve damage or wear over time. The flutter zone typically begins at the set point and ends at the flow rate associated with 10% overpressure. The Enardo Valve Sizing Program displays the flutter zone. Contact your local Sales Office with any questions or additional assistance.

Figure 5. ATEX Certified Markings

OUTER HOUSING OF STAINLESS STEEL, CARBON STEEL OR COATED ALUMINUM

OUTER HOUSING OF UNCOATED ALUMINUM

4

860 and 960 Series

Nor

th A

mer

ica

Onl

y

3. After the valve has been properly aligned, install nuts and bolts. Tighten the bolts down in a cross-hatched pattern. Ensure the valve is securely fastened.

Installing Pressure/Vacuum Relief Valves with Weight-loaded Pallets

Note

The following steps 1 to 7 apply only to valves that have a weight-loaded vacuum or pressure pallet. These steps do not apply to pallets that are spring-loaded on both the pressure and vacuum sides.

Installation

CAUTION

Ensure the tank is at atmospheric pressure before opening. A pressure build-up inside the tank can cause a spray to be emitted from the valve if opened under pressure.

Springs are energy storage devices and are dangerous if handled improperly. Never loosen any nuts or cap screws until all spring preload has been relieved. Always use appropriate safety equipment including safety glasses or shields any time you are working with a spring-loaded valve.

Installing Pressure/Vacuum Relief Valves with Only Spring-Loaded Pallets1. Attach the valve to the appropriate mating flange

using a proper gasket. To ensure proper function, install the valves to a level horizontal surface so the pallet will move vertically. For Models 860, 960 and 962, the valve shipped from factory has certain studs installed.

2. Orient valve in desired direction. Models 860 and 861 require the pipe-away connection flange to be properly oriented before the base is bolted down.

Figure 6. Pressure and Vacuum Flow

PRESSURE FLOW VACUUM FLOW

Pressure Flow

Vacuum Flow

Pressure Flow

Vacuum Flow

5

860 and 960 Series

Nor

th A

mer

ica

Onl

y

4. Reinsert uncovered valve pallets back into the unit. Make sure the lower stem on the pallet is centered into the valve seat. If the pallet appears to be off center to the valve chamber, or if there is difficulty positioning the lid or guide, carefully inspect the pallet to ensure it is inserted properly.

5. To adjust valve settings higher than minimum, use the weights included with the shipment to increase the pressure setting. Weights are packed separately within the unit shipping package and are labeled “PRESSURE” and/or “VACUUM”. If weights are shipped with the unit, they should be installed onto the pallets in the valve chamber in which they are labeled. Gently slide the weights onto the pallet stem and down on top of the valve pallet.

1. If the valve has a weight-loaded vacuum, loosen fasteners on top of the valve and remove the lid, hood or guide.

2. Remove valve pallets from the unit.

3. Separate the protective cardboard coverings from the pallets. Be careful not to damage the pallet seal surface.

6

860 and 960 Series

Nor

th A

mer

ica

Onl

y

6. Replace any lid, hood or guide that was previously removed, and fasten securely. When tightening down lids, make sure the O-ring in the lid has full contact with the sealing surface.

7. Attach the valve to the appropriate mating flange using proper gasket. To ensure proper function, install the valve to a level horizontal surface so the pallet will move vertically. Units that are tilted during usage may suffer premature damage or wear.

For more details on using weights to adjust the pallet setting, refer to the Weight Information section.

Note

Before using your new Enardo pressure/vacuum relief valve, make sure that your valve is properly set for the appropriate pressure and vacuum settings. Early or delayed relief could be dangerous and/or expensive depending on the application.

Spring–loaded valves are set at the factory. Additional adjustment should not be required and is not recommended.

Maintenance

! WARNING

Ensure the tank is at atmospheric pressure before opening or removing a valve. Pressure build-up inside the tank can cause a spray to be emitted from the valve if opened under pressure.

Springs are energy storage devices and are dangerous if handled improperly. Never loosen any nuts or screws until all spring preload has been relieved. Instructions for removing spring preload are provided in this section. Always use appropriate safety equipment including safety glasses or shields any time you are working with a spring-loaded valve.

Determine if the pressure/vacuum relief valve assembly is an 860 Series pipe-away in-line configuration or a 960 Series vent-to atmosphere configuration.

860 Series Pipe-AwaySee Figure 8 for reference.

1. Remove the cylindrical cap(s) from the lid(s) by removing the small screws.

2. Turn the spring plunger clockwise to remove all spring preload. Note the number of turns the plunger has been turned to facilitate reassembly.

3. Remove the hex bolts holding the lid to the body and lift off the lid.

CAUTION

If the lid shows signs of any remaining spring preload, do not continue with the disassembly until this condition is corrected. If the cap screws seem to be under a load or if the lid starts to rise as the cap screws are loosened, the spring is still under load.

4. The valve contains a single spring or a multiple nested spring arrangement. Inspect the springs and other internal parts for signs of deterioration and/or corrosion. Replace any worn or damaged parts.

7

860 and 960 Series

Nor

th A

mer

ica

Onl

y

Figure 7. 860 and 960 Series Common Valve Configurations

PIPE-AWAY SPRING-LOADED PRESSURE/VACUUM RELIEF VALVE

VENT-TO-ATMOSPHERE SPRING-LOADED PRESSURE/VACUUM RELIEF VALVE

MODEL 860

MODEL 861

MODEL 860

MODEL 963

MODEL 960

MODEL 961

MODEL 960

MODEL 962

8

860 and 960 Series

Nor

th A

mer

ica

Onl

y

5. Remove any valve pallets and weights from the unit if so equipped. Keep in mind that these will be reinstalled, so keep track of the chamber from which they were removed.

6. Inspect the pallets for any damage and/or buildup that may affect its sealing characteristics or its ability to move properly inside the valve. If necessary, gently clean the pallet and seal with a suitable solvent and nonabrasive cloth.

7. Clean the removed parts with a suitable solvent.8. Inspect the valve seats installed in the unit. The

sealing surfaces should be smooth and free of nicks or buildup. Check the guides for anything that may keep the valve pallet from moving properly inside the valve. If necessary, gently clean the seats with a suitable solvent and nonabrasive cloth.

9. If lid is available on the valve, clean any buildup that may exist in or around the guide hole located in the center of the part.

10. If the valve is fitted with a screen of some type, clear away any blockage that may impede proper flow.

11. Reassemble the valve in reverse order from disassembly.

12. Make sure the lower stem on the pallet is centered into the valve seat. If the pallet appears to be off center to the valve chamber, or if there is difficulty positioning the lid or guide, the pallet may be inserted improperly.

13. Adjust the spring preload by returning the spring plunger to its factory set location as noted earlier or install on a pressure test stand and adjust to the desired setting.

960 Series Vent to AtmosphereSee Figures 8 and 9 for reference.

1. For 4 and 6 in. valves, remove the cylindrical cap(s) from the lid(s) by removing the small screws.

2. Remove the hood by removing the wing nuts or screws holding it in place. Hood can be removed without releasing spring preload, but do not remove the hex nuts until the spring preload has been removed.

3. Follow steps 2 to 13 from the 860 Series Pipe-Away Maintenance section on page 7.

Figure 8. 960 Series Pressure/Vaccum Relief Valves

2 AND 3 IN. RELIEF VALVES

HEX NUTSTYPICAL 4 PLACES

SCREWSTYPICAL 4 PLACES

4 AND 6 IN. RELIEF VALVES

SCREWSTYPICAL 3 PLACES

ENLARGED HOLESWITH HEX NUTS TYPICAL 3 PLACES

WING NUTSTYPICAL 3 PLACES

9

860 and 960 Series

Nor

th A

mer

ica

Onl

y

Weight InformationNote

Spring-loaded valves can have a weight-loaded component.

The Enardo pressure/vacuum relief valve can achieve various pressure and vacuum settings in units of ounces per square inch (oz./sq. in.) or inches of water column (in. w.c.) when weights are used. Standard Enardo weight-loaded valve pallets installed without weights or springs reach minimum settings of 1/2 oz./sq. in. or 1 in. w.c. The pallets’ setting is stamped into the seal support located on the bottom side of the pallet. The pallet’s setting of 1/2 oz./sq. in. or 1 in. w.c. is etched into the support.

When a valve requires a setting higher than the 1/2 oz./sq. in. or 1 in. w.c. basic pallet setting, use weights to increase the pallet’s set pressure. Enardo weights also come in units of ounces per square inch (oz./sq. in.) or inches of water column (in. w.c.). The individual setting of each weight is either etched or imprinted into the weight. Emerson offers several different sizes of pressure/vacuum relief valves. To ensure that the right weight is placed on the right pallet, keep in mind that the weights and pallets that go together will have the same outside diameter. Standard Enardo weights allow the user to stack in increments of 1/2 oz./sq. in. or 1/2 in. w.c.

Your Enardo pressure/vacuum relief valve shipment includes prepackaged weight kits used to achieve the proper settings for the valve you ordered. The package labeled “PRESSURE” goes on the pallet in the pressure chamber. The package labeled “VACUUM” goes on the pallet in the vacuum chamber. All of the weights in these packages should be installed. If one or neither of these packages is included with your order, then they are not needed.

If the pressure and vacuum weights are mixed together, sort and reorganize the weights.

When installing weights for the Enardo pressure/vacuum relief valve, check the required settings for the valve located on the tag attached to the unit. Then add weights to the pallet to achieve the required setting. For example, if the relief valve’s setting is 6 oz./sq. in., add weights with the total setting of 5-1/2 oz./sq. in. to the valve; the pallet alone achieves 1/2 oz. setting. Therefore, the weights to be added must total the remaining balance of the required setting, which in this example is 5-1/2 oz. Hence, the valve pressure setting is the sum of the settings of the pallet and the weights.

Valve RepairOn occasion, valve housings or internal components can be damaged due to accidents, improper usage or wear. With Enardo’s modular design and unique replaceable seat, many repairs to damaged valves can be made on site instead on a remote repair site. This feature causes minimal downtime if there is an equipment breakdown or malfunction.A damaged valve may require replacement of the entire pressure or vacuum assembly, or it may require a single component, such as a valve seat or pallet. All Enardo seats and pallets are tested for their sealing capabilities before they are shipped from the plant. Enardo assemblies and components can be quickly and easily installed. Once installed, the valve is ready for continued dependable operation.Contact your local Sales Office with any questions or additional assistance you may need for repairing your valve.

Parts OrderingWhen corresponding with your local Sales Office about this equipment, always reference the equipment serial number stamped on the nameplate.When ordering replacement parts, specify the complete 7-character part number of each required part as found in the following parts list.

Figure 9. Weights on Pallet

10

860 and 960 Series

Nor

th A

mer

ica

Onl

y

8 Hex Bolt (as required) 20 - 1/4 X 0.88 in. (2 and 3 in. Valves) 316 Stainless steel 2035903 A307 Zinc plated 2035805 20 - 1/4 X 1.00 in. (4 and 6 in. Valves) 316 Stainless steel 2035906 A307 Zinc plated 20358069 Flat Washer, 1/4 in. (as required) 316 Stainless steel 2012510 F436 Zinc plated 200020810 Gasket 3 in. body for 2 and 3 in. valves Buna N (1/16 in.) 8550801 Ethylenepropylene (EPDM) (3/32 in.) 8550812 Teflon® (1/16 in.) 8550807 Viton® (1/16 in.) 8550803 6 in. for 4 and 6 in. valves Buna N (1/16 in.) 8590801 Ethylenepropylene (EPDM) (3/32 in.) 85908XX Teflon® (1/16 in.) 8550803 Viton® (1/16 in.) 859080211 Stud, 16 - 3/8 x 1.5 in. (2 required) A193-B7 Zinc plated 2006834 316 Stainless steel 201043412 Hex Bolt, 16 - 0.375 x 0.875 in. (2 and 3 in. valves) (2 required) A307 Zinc plated 2000505 316 Stainless steel 201320513 Flat Washer, 3/8 in. (as required) F436 Zinc plated 2000204 316 Stainless steel 201250414 Hex Nut, 16 - 3/8 in. (2 required) A563 Zinc plated 2000402 316 Stainless steel 201330215 PVRV, Extension screen 2 and 3 in. valves Zinc plated carbon steel 8553801 316 Stainless steel 8554505 4 and 6 in. valves Zinc plated carbon steel 8553802 316 Stainless steel 855450616 Seat Retainer 2 and 3 in. valves 3003-H14 Aluminum 8591001 A1011 Carbon steel 8591002 304L Stainless steel 8591003 316 Stainless steel 8591012 4 and 6 in. Valves 3003-H14 Aluminum 8591004 A1011 Carbon steel 8591005 304L Stainless steel 8591006 316 Stainless steel 859101017 Bolt, Hex 16 - 3/8 x 0.50 in. (6 required) A307 Zinc plated 2000515 316 Stainless steel 201320918 Stud 11 - 5/8 in. x 2.75 in. (2, 3 and 4 in. valves) (2 required) A193-B7 Zinc plated 2007204 316 Stainless steel 2010804 10 - 3/4 in. x 3.25 in. (4 and 6 in. valves) (4 required) A193-B7 Zinc plated 2007206 316 Stainless steel 201090619 Plug, 1/4 in. Hex Head Zinc plated carbon steel 2023805 316 Stainless steel 203070520 Nameplate, PVRV, ATEX, T304 Stainless steel (as required) 855100521 Drive Screw, #4 18-8 Stainless steel (as required) 200140122 Adapter (as required) 2 in. valves 85520XX 3 in. valves 85520XX 4 in. valves 85917XX 6 in. valves 85917XX

Parts List Models 860, 861 and 963Key Description Part Number

1 Upper body, SL-PVRV, Machined 3 in. Flat faced 85902XX Raised faced 85902XX 4 in. Flat faced 85902XX Raised faced 85902XX 6 in. Flat faced 85902XX Raised faced 85902XX 8 in. Flat faced 85902XX Raised faced 85902XX2 Lower body, SL-PVRV, Machined 2 in. Flat faced 85901XX Raised faced 85901XX 3 in. Flat faced 85901XX Raised faced 85901XX 4 in. Flat faced 85901XX Raised faced 85901XX 6 in. Flat faced 85901XX Raised faced 85901XX3 Webbed seat, PVRV, Machined (2 required) 2 and 3 in. valves Polyphenylene Sulfide (PPS) 8553701 A351 CF8M Stainless steel 8553703 4 and 6 in. valves Polyphenylene Sulfide (PPS) 8553702 A351 CF8M Stainless steel 85537044 O-ring (2 required) 244, 2 and 3 in. valves Buna 2001202 Viton® 2012702 Teflon®/Silicon 2020901 Silicon 2051202 261, 4 and 6 in. valves Buna 2001204 Viton® 2012704 Teflon®/Silicon 2020902 Silicon 20512045 Lid, SL-PVRV, Machined (as required) 2 in. valves 85906XX 3 in. valves 85906XX 4 in. valves 85906XX 6 in. valves 85906XX6 Cap (as required) 3 in. for 2 and 3 in. valves Aluminum 85907XX Carbon steel 85907XX 316/316L Stainless steel 85907XX 6 in. for 4 and 6 in. valves Aluminum 85907XX Carbon steel 85907XX 316/316L Stainless steel 85907XX7 Lid Gasket, (as required) 3 in. for 2 and 3 in. valves Buna 8591601 Viton® 8591602 Teflon®/Goretex 8591603 6 in. for 4 and 6 in. valves Aluminum 8591604 Carbon steel 8591605 316/316L Stainless steel 8591606

Key Description Part Number

Teflon® and Viton® are marks owned by E. I. du Pont de Nemours and Company.11

860 and 960 Series

Nor

th A

mer

ica

Onl

y

Teflon® and Viton® are marks owned by E. I. du Pont de Nemours and Company.

Models 860, 861 and 963 (continued)Key Description Part Number

23 Lid Assembly (as required) 3 in. for 2 and 3 in. valves 85993XX 6 in. for 4 and 6 in. valves 85993XX24 Guide Shaft (as required) 2 and 3 in. valves Aluminum 8594201 Carbon steel 8594202 Stainless steel 8594203 4 and 6 in. valves Aluminum 8594204 Carbon steel 8594205 Stainless steel 859420625 Plunger (as required) 2 and 3 in. valves Aluminum 8591201 Carbon steel 8591202 Stainless steel 8591203 4 and 6 in. valves Aluminum 8591204 Carbon steel 8591205 Stainless steel 859120626 O-ring, 1.75 in. (as required) - - - - - - -27 O-ring, 1 in. (as required) - - - - - - -28 Jam Nut, 3/4 in. (as required) Carbon steel 2035603 316 Stainless steel 203570329 Flat Washer, 3/4 in. (as required) - - - - - - -30 Bearing, 0.75 x 0.63 x 0.75 in. (as required) NF1012-12 Flanged, Nylon (PE) 2020602 EF101212 Flanged, SAE 841 Bronze 2053001

Models 960, 961 and 962Key Description Part Number

1 Lower body, SL-PVRV 2 in. 85901XX 3 in. 85901XX 4 in. 85901XX 6 in. 85901XX2 Webbed Seat, PVRV, Machined, (2 required) 2 and 3 in. valves Polyphenylene Sulfide (PPS) 8553701 A351 CF8M Stainless steel 8553703 4 and 6 in. valves Polyphenylene Sulfide (PPS) 8553702 A351 CF8M Stainless steel 85537043 O-ring (2 required) 224, 2 and 3 in. valves Buna 2001202 Viton® 2012702 Teflon®/Silicon 2020901 Silicon 2051202 261, 4 and 6 in. valves Buna 2001204 Viton® 2012704 Teflon®/Silicon 2020902 Silicon 20512044 Lid, SL-PVRV, Machined (as required) 2 in. valves 85906XX 3 in. valves 85906XX 4 in. valves 85906XX 6 in. valves 85906XX5 Cap (as required) 3 in. for 2 and 3 in. valves Aluminum 85907XX Carbon steel 85907XX 316/316L Stainless steel 85907XX

5 Cap (as required) (continued) 6 in. for 4 and 6 in. valves Aluminum 85907XX Carbon steel 85907XX 316/316L Stainless steel 85907XX6 Lid Gasket, (as required) 3 in. for 2 and 3 in. valves Buna 8591601 Viton® 8591602 Teflon®/Goretex 8591603 6 in. for 4 and 6 in. valves Aluminum 8591604 Carbon steel 8591605 316/316L Stainless steel 85916067 Hex Bolt (as required) 20 - 1/4 in. X 0.88 (2 and 3 in. valves) 316 Stainless steel 2035903 A307 Zinc plated 2035805 20 - 1/4 in. X 1.00 (4 and 6 in. valves) 316 Stainless steel 2035906 A307 Zinc plated 20358068 Flat Washer, 1/4 in. (as required) 316 Stainless steel 2012510 F436 Zinc plated 20002089 Gasket 3 in. body for 2 and 3 in. valves Buna N (1/16 in.) 8550801 Ethylenepropylene (EPDM) (3/32 in.) 8550812 Teflon® (1/16 in.) 8550807 Viton® (1/16 in.) 8550803 6 in. for 4 and 6 in. valves Buna N (1/16 in.) 8590801 Ethylenepropylene (EPDM) (3/32 in.) 85908XX Teflon® (1/16 in.) 8550803 Viton® (1/16 in.) 859080210 Vent Mesh 3 in. for 2 and 3 in. valves Aluminum 8551801 Carbon steel 8551803 316 Stainless steel 8551805 6 in. for 4 and 6 in. valves Aluminum 8551802 Carbon steel 8551804 316 Stainless steel 855180611 Vent Shield 3 in. for 2 and 3 in. valves Aluminum 8554301 Carbon steel 8554303 304L Stainless steel 8554305 6 in. for 4 and 6 in. valves Aluminum 8554302 Carbon steel 8554304 304L Stainless steel 855430612 Hood 3 in. Spring Loaded for 2 and 3 in. valves Aluminum 8591501 Carbon steel 8591502 304 Stainless steel 8591503 3 in. PVRV for 2 and 3 in. valves Aluminum 8551501 Carbon steel 8551503 304 Stainless steel 8551505 6 in. Spring Loaded for 4 and 6 in. valves Aluminum 8591504 Carbon steel 8591505 304 Stainless steel 8591506 6 in. PVRV for 4 and 6 in. valves Aluminum 8591510 Carbon steel 8591511 304 Stainless steel 859151213 Vent Rod 3 in. PVRV (4 required) 2 and 3 in. valve, Aluminum 8552701 2 and 3 in. valve, 304L Stainless steel 8552703

Key Description Part Number

12

860 and 960 Series

Nor

th A

mer

ica

Onl

y

Key Description Part NumberModels 960, 961 and 962 (continued)Key Description Part Number

13 Vent Rod (continued) 3 in. SL-PVRV (4 required) 2 and 3 in. valve, Carbon steel 8592701 2 and 3 in. valve, 304 Stainless steel 8592702 6 in. PVRV (6 required) 4 and 6 in. valve, Aluminum 8552702 4 and 6 in. valve, 304L Stainless steel 8552704 6 in. SL-PVRV (6 required) 4 and 6 in. valve, Carbon steel 8552703 4 and 6 in. valve, 304 Stainless steel 859270414 Helical Lock Washer, 3/8 in. (as required) Zinc plated carbon steel 2021703 304 Stainless steel 2022801 316 Stainless steel 202160215 Upper Guide (as required) 3 in. for 2 and 3 in. valves Aluminum 8553601 Zinc plated carbon steel 8553603 304L Stainless steel 8553605 6 in. for 4 and 6 in. valves Aluminum 8599801 Zinc plated carbon steel 8599802 304L Stainless steel 859980316 Wing Nut, 16 - 3/8 in. (as required) Zinc plated carbon steel 2001001 316 Stainless steel 202620117 Bearing (as required) 0.75 x 0.63 x 0.75 in. NF1012-12 Flanged, Nylon 2020602 0.75 x 0.63 x 0.75 in. EF1012-12 Flanged, SAE 841 Bronze 205300119 Flat Washer, 3/8 in. (as required) F436 Zinc plated 2000204 316 Stainless steel 201250420 Hex Nut, 16 - 3/8 in. (as required) A563 Zinc plated 2000402 316 Stainless steel 201330221 Extension Screen, PVRV (as required) 2 and 3 in. valves Zinc plated carbon steel 8553801 316 Stainless steel 8554505 4 and 6 in. valves Zinc plated carbon steel 8553802 316L Stainless steel 8554506 Aluminum 855450222 Seat Retainer 2 and 3 in. valves 3003-H14 Aluminum 85910XX A1011 Carbon steel 85910XX 316 Stainless steel 85910XX 4 and 6 in. valves 3003-H14 Aluminum 85910XX A1011 Carbon steel 85910XX 316 Stainless steel 85910XX23 Hex Bolt, 16 - 3/8 x 0.50 in. (6 required) A307 Zinc plated 2000515 316 Stainless steel 201320924 Stud, 11 - 5/8 x 2.75 in. (2 required) A193-B7 Zinc plated 2007204 316 Stainless steel 201080425 Nameplate, PVRV, ATEX, T304 Stainless steel 855100526 Dive Screw, #4, 18-8 Stainless steel (4 required) 200140127 Adapter (as required) 2 in. 85520XX 3 in. 85520XX 4 in. 85917XX 6 in. 85917XX

28 Cover, PVV (as required) 3 in. for 2 and 3 in. valves 6061-T6 Aluminum 8552901 A36 Carbon steel 8552903 316 Stainless steel 8552905 6 in. for 4 and 6 in. valves 6061-T6 Aluminum 8591801 A36 Carbon steel 8591802 316 Stainless steel 859180329 Helical Lock Washer, 1/4 in., 316 Stainless steel (as required) 202160730 Guide Shaft (as required) 2 and 3 in. valves Aluminum 8594201 Carbon steel 8594202 Stainless steel 8594203 4 and 6 in. valves Aluminum 8594204 Carbon steel 8594205 Stainless steel 859420631 Plunger (as required) 2 and 3 in. valves Aluminum 8591201 Carbon steel 8591202 Stainless steel 8591203 4 and 6 in. valves Aluminum 8591204 Carbon steel 8591205 Stainless steel 859120632 O-ring, 1.75 in. (as required) - - - - - - -33 O-ring, 1 in. (as required) - - - - - - -34 Flat Washer, 3/4 in. (as required) - - - - - - -35 Jam Nut, 3/4 in. (as required) Carbon steel 2035603 316 Stainless steel 2035703

Pallet AssemblyKey Description Part Number

1 Pallet Seal 3 in., 1 hole 0.01 in. thickness, Teflon® 8554822 0.02 in. thickness, Teflon® 8554823 0.03 in. thickness, Teflon® 8554824 1/32 in. thickness, Viton® 8554825 1/32 in. thickness, Buna 8554826 1/16 in. thickness, Viton® 8554833 1/16 in. thickness, Buna 8554834 6 in., 1 hole 0.01 in. thickness, Teflon® (For Stainless steel Pallet) 8554827 0.01 in. thickness, Teflon® (For Polyphenylene Sulfide [PPS] Pallet) 8554854 0.02 in. thickness, Teflon® 8554828 0.03 in. thickness, Teflon® 8554829 1/32 in. thickness, Viton® 8554830 1/32 in. thickness, Buna 8554831 1/16 in. thickness, Viton® 8554852 3 in., High Temperature 0.01 in. thickness, Teflon® 8554839 6 in., High Temperature 0.01 in. thickness, Teflon® 8554838 0.02 in. thickness, Teflon® 8554837 3 in., 10 hole 0.01 in. thickness, Teflon® 8554856 6 in., 10 hole 0.01 in. thickness, Teflon® 85548572 Upper Stem - - - - - - -

Teflon® and Viton® are marks owned by E. I. du Pont de Nemours and Company.

13

860 and 960 Series

Nor

th A

mer

ica

Onl

y

Pallet Assembly (continued)Key Description Part Number

3 Spring, Stainless steel (as required) 3 in. 0.5 psi E8590901 1 psi E8590902 2 psi E8590903 4 psi E8590904 8 psi E8590905 6 in. 0.5 psi E8590906 1 psi E8590907 2 psi E8590908 4 psi E8590909 8 psi E8590910 4.87 to 8.55 psi E8590911 8.55 to 15.01 psi E8590912

- 860, 861, & 963 Exploded Drawing

960, 961, & 962 Exploded Drawing

Figure 10. Models 860, 861 and 963 Assembly Drawing

Key Description Part Number

4 Lower Stem - - - - - - -5 Pallet Disc - - - - - - -6 Seal Support - - - - - - -7 Bolt (as required) - - - - - - -8 Hex Nuts (as required) - - - - - - -9 O-ring - - - - - - -10 SL Pallet Disc Support - - - - - - -11 Plunger Plate - - - - - - -

14

860 and 960 Series

Nor

th A

mer

ica

Onl

y

Figure 11. Models 960, 961 and 962 Assembly Drawing

- 860, 861, & 963 Exploded Drawing

960, 961, & 962 Exploded Drawing

15

860 and 960 Series

Nor

th A

mer

ica

Onl

y

Figure 12. Pallet Assembly Drawing

NOTE: NUMBER AND CONFIGURATION OF SPRINGS WILL VARY

NOTE: BOLTS MAY NOT BE PRESENT OR CONFIGURATION MAY VARY

860 and 960 Series

Facebook.com/EmersonAutomationSolutions

LinkedIn.com/company/emerson-automation-solutions

Twitter.com/emr_automation

Webadmin.Regulators@emerson.com

Enardo.com

D103813X012 © 2015, 2017 Emerson Process Management Regulator Technologies, Inc. All rights reserved. 10/17. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Enardo™ is a mark owned by Regulator Technologies Tulsa, LLC, a business of Emerson Automation Solutions.

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, express or 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.

Emerson Process Management Regulator Technologies Tulsa, LLC does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson Process Management Regulator Technologies Tulsa, LLC product remains solely with the purchaser.

Nor

th A

mer

ica

Onl

y

Emerson Automation Solutions

Americas McKinney, Texas 75070 USA T +1 800 558 5853

+1 972 548 3574Tulsa, OK 74146 USA T +1 918 662 6161

Europe Bologna 40013, Italy T +39 051 419 0611

Asia Pacific Singapore 128461, Singapore T +65 6770 8337

Middle East and Africa Dubai, United Arab Emirates T +971 4 811 8100