860 and 960 Series Spring-Loaded Pressure/
Vacuum Relief Valve (ATEX Approved)
Table of Contents
Introduction .................................................................. 1
Specifications .............................................................. 2
Product Identification and Marking .............................. 4
Principle of Operation .................................................. 4
Installation ................................................................... 5
Maintenance ................................................................ 7
Weight Information ....................................................10
Valve Repair .............................................................. 10
Parts Ordering ........................................................... 10
Parts List ................................................................... 11
!
WARNING
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion,
re 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 qualied
service person to service the unit.
Installation, operation and maintenance
procedures performed by unqualied
person may result in improper adjustment
and unsafe operation. Either condition may
result in equipment damage or personal
injury. Only a qualied 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 Manual
This 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 Manual
D103813X012
October 2017
860 and 960 Series
North America Only
Specications
The Specications section on this page provides specications for the 860 and 960 Series spring-loaded
pressure/vacuum relief valve. Specication is stamped on the nameplate attached to the relief valve. Refer to
Product Identication and Marking section for the nameplate details.
Available Construction
See Figure 3
Inlet Connection Sizes
2 through 6 in. / 50 through 150 mm
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
Vacuum 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 Sulde (PPS) or 316
Stainless steel (standard above 5 psi)
Pallet Seal: Buna-N, FEP Teon
®
or Viton
®
Hardware: Zinc plated carbon steel or
Stainless steel
Weights: Zinc plated carbon steel, Stainless steel
or Lead
Gaskets: Buna-N, Teon
®
or Viton
®
Certication
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.
Teon
®
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 - - - / -
Inlet
Connection
Size
(2 through
6 in.)
Outlet
Connection
Size
(3 through
8 in.)
Housing
Material
1 = Aluminum
2 = Stainless
Steel
3 = Carbon
Steel
Pallet and Seat
Ring Material
1 = Advanced
Composite-
Polyphenylene
Sulde (PPS)
2 = 316 Stainless Steel
3 = Other
Pallet Seal
Material
1 = FEP Teon
®
2 = Buna-N
3 = Viton
®
4 = Other
Pressure Settings
p = psig
z = oz./sq. in.
n = in. w.c.
0.5 to 15.0 psi
(0.5 psi
increments)
0.5 to
32.0 oz./sq. in.
(0.5 oz./sq. in.
increments)
1.0 to
55.0 in. w.c.
(0.5 in. w.c.
increments)
Vacuum Settings
p = psig
z = oz./sq. in.
n = in. w.c.
0.5 to 15.0 psi
(0.5 psi
increments)
0.5 to
32.0 oz./sq. in.
(0.5 oz./sq. in.
increments)
1.0 to
55.0 in. w.c.
(0.5 in. w.c.
increments)
Options
O = No Options
A = Special Coating
B = Stainless steel
Weights
C = Optional Weight
Material
D = Optional Hardware
E = Optional Gasket
Material
G = Steam Jacket
or Trace
H = Other
Inlet
Connection
Size
(2 through
6 in.)
Housing
Material
1 = Aluminum
2 = Stainless
Steel
3 = Carbon
Steel
Pallet and Seat
Ring Material
1 = Advanced
Composite-
Polyphenylene
Sulde (PPS)
2 = 316 Stainless
Steel
3 = Other
Pallet Seal
Material
1 = FEP Teon
®
2 = Buna-N
3 = Viton
®
4 = Other
Pressure Settings
p = psig
z = oz./sq. in.
n = in. w.c.
0.5 to 15.0 psi
(0.5 psi
increments)
0.5 to
32.0 oz./sq. in.
(0.5 oz./sq. in.
increments)
1.0 to
55.0 in. w.c.
(0.5 in. w.c.
increments)
Vacuum Settings
p = psig
z = oz./sq. in.
n = in. w.c.
0.5 to 15.0 psi
(0.5 psi
increments)
0.5 to
32.0 oz./sq. in.
(0.5 oz./sq. in.
increments)
1.0 to
55.0 in. w.c.
(0.5 in. w.c.
increments)
Options
O = No Options
A = Special Coating
B = Stainless steel Weights
C = Optional Weight
Material
D = Optional Hardware
E = Optional Gasket
Material
G = Steam Jacket
or Trace
H = Other
2
860 and 960 Series
North America Only
Product Description
The 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
North America Only
Product Identication and Marking
Hazardous Locations
Enardo spring-loaded pressure/vacuum relief valves
are available with outer housings of carbon steel,
stainless steel or aluminum, as indicated in Figure 5.
Nameplate
A 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)
• Notied Body Number – Ex. 0575
• Cat. No. (Category Number) –
Ex. II 1 G c T6 or II 2 G c T6
• Year
• Cert. No. (Certicate 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 Operation
The 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 orice 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 utter or oscillate inside
the valve chamber. This is common to products of this
model. Operating the valve with utter or oscillation may
cause premature valve damage or wear over time. The
utter zone typically begins at the set point and ends at
the ow rate associated with 10% overpressure. The
Enardo Valve Sizing Program displays the utter zone.
Contact your local Sales Ofce 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
North America Only
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 Pallets
1. Attach the valve to the appropriate mating ange
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 ange 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
North America Only
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 difculty 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
North America Only
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 ange
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 conguration or a 960 Series vent-to
atmosphere conguration.
860 Series Pipe-Away
See 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
North America Only
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
North America Only
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 tted with a screen of some type,
clear away any blockage that may impede
proper ow.
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 difculty
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 Atmosphere
See 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 NUTS
TYPICAL
4 PLACES
SCREWS
TYPICAL
4 PLACES
4 AND 6 IN. RELIEF VALVES
SCREWS
TYPICAL
3 PLACES
ENLARGED HOLES
WITH HEX NUTS
TYPICAL 3 PLACES
WING NUTS
TYPICAL
3 PLACES
9
860 and 960 Series
North America Only
Weight Information
Note
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 Repair
On 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 Ofce with any questions
or additional assistance you may need for repairing
your valve.
Parts Ordering
When corresponding with your local Sales Ofce 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
North America Only
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 2035806
9 Flat Washer, 1/4 in. (as required)
316 Stainless steel 2012510
F436 Zinc plated 2000208
10 Gasket
3 in. body for 2 and 3 in. valves
Buna N (1/16 in.) 8550801
Ethylenepropylene (EPDM) (3/32 in.) 8550812
Teon
®
(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
Teon
®
(1/16 in.) 8550803
Viton
®
(1/16 in.) 8590802
11 Stud, 16 - 3/8 x 1.5 in. (2 required)
A193-B7 Zinc plated 2006834
316 Stainless steel 2010434
12 Hex Bolt, 16 - 0.375 x 0.875 in.
(2 and 3 in. valves) (2 required)
A307 Zinc plated 2000505
316 Stainless steel 2013205
13 Flat Washer, 3/8 in. (as required)
F436 Zinc plated 2000204
316 Stainless steel 2012504
14 Hex Nut, 16 - 3/8 in. (2 required)
A563 Zinc plated 2000402
316 Stainless steel 2013302
15 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 8554506
16 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 8591010
17 Bolt, Hex 16 - 3/8 x 0.50 in. (6 required)
A307 Zinc plated 2000515
316 Stainless steel 2013209
18 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 2010906
19 Plug, 1/4 in. Hex Head
Zinc plated carbon steel 2023805
316 Stainless steel 2030705
20 Nameplate, PVRV, ATEX, T304 Stainless steel (as required) 8551005
21 Drive Screw, #4
18-8 Stainless steel (as required) 2001401
22 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 963
Key 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 85902XX
2 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 85901XX
3 Webbed seat, PVRV, Machined (2 required)
2 and 3 in. valves
Polyphenylene Sulde (PPS) 8553701
A351 CF8M Stainless steel 8553703
4 and 6 in. valves
Polyphenylene Sulde (PPS) 8553702
A351 CF8M Stainless steel 8553704
4 O-ring (2 required)
244, 2 and 3 in. valves
Buna 2001202
Viton
®
2012702
Teon
®
/Silicon 2020901
Silicon 2051202
261, 4 and 6 in. valves
Buna 2001204
Viton
®
2012704
Teon
®
/Silicon 2020902
Silicon 2051204
5 Lid, SL-PVRV, Machined (as required)
2 in. valves 85906XX
3 in. valves 85906XX
4 in. valves 85906XX
6 in. valves 85906XX
6 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 85907XX
7 Lid Gasket, (as required)
3 in. for 2 and 3 in. valves
Buna 8591601
Viton
®
8591602
Teon
®
/Goretex 8591603
6 in. for 4 and 6 in. valves
Aluminum 8591604
Carbon steel 8591605
316/316L Stainless steel 8591606
Key Description Part Number
Teon
®
and Viton
®
are marks owned by E. I. du Pont de Nemours and Company.
11
860 and 960 Series
North America Only
Teon
®
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 85993XX
24 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 8594206
25 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 8591206
26 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 2035703
29 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 962
Key Description Part Number
1 Lower body, SL-PVRV
2 in. 85901XX
3 in. 85901XX
4 in. 85901XX
6 in. 85901XX
2 Webbed Seat, PVRV, Machined, (2 required)
2 and 3 in. valves
Polyphenylene Sulde (PPS) 8553701
A351 CF8M Stainless steel 8553703
4 and 6 in. valves
Polyphenylene Sulde (PPS) 8553702
A351 CF8M Stainless steel 8553704
3 O-ring (2 required)
224, 2 and 3 in. valves
Buna 2001202
Viton
®
2012702
Teon
®
/Silicon 2020901
Silicon 2051202
261, 4 and 6 in. valves
Buna 2001204
Viton
®
2012704
Teon
®
/Silicon 2020902
Silicon 2051204
4 Lid, SL-PVRV, Machined (as required)
2 in. valves 85906XX
3 in. valves 85906XX
4 in. valves 85906XX
6 in. valves 85906XX
5 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 85907XX
6 Lid Gasket, (as required)
3 in. for 2 and 3 in. valves
Buna 8591601
Viton
®
8591602
Teon
®
/Goretex 8591603
6 in. for 4 and 6 in. valves
Aluminum 8591604
Carbon steel 8591605
316/316L Stainless steel 8591606
7 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 2035806
8 Flat Washer, 1/4 in. (as required)
316 Stainless steel 2012510
F436 Zinc plated 2000208
9 Gasket
3 in. body for 2 and 3 in. valves
Buna N (1/16 in.) 8550801
Ethylenepropylene (EPDM) (3/32 in.) 8550812
Teon
®
(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
Teon
®
(1/16 in.) 8550803
Viton
®
(1/16 in.) 8590802
10 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 8551806
11 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 8554306
12 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 8591512
13 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
North America Only
Key Description Part Number
Models 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 8592704
14 Helical Lock Washer, 3/8 in. (as required)
Zinc plated carbon steel 2021703
304 Stainless steel 2022801
316 Stainless steel 2021602
15 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 8599803
16 Wing Nut, 16 - 3/8 in. (as required)
Zinc plated carbon steel 2001001
316 Stainless steel 2026201
17 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 2053001
19 Flat Washer, 3/8 in. (as required)
F436 Zinc plated 2000204
316 Stainless steel 2012504
20 Hex Nut, 16 - 3/8 in. (as required)
A563 Zinc plated 2000402
316 Stainless steel 2013302
21 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 8554502
22 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 85910XX
23 Hex Bolt, 16 - 3/8 x 0.50 in. (6 required)
A307 Zinc plated 2000515
316 Stainless steel 2013209
24 Stud, 11 - 5/8 x 2.75 in. (2 required)
A193-B7 Zinc plated 2007204
316 Stainless steel 2010804
25 Nameplate, PVRV, ATEX, T304 Stainless steel 8551005
26 Dive Screw, #4, 18-8 Stainless steel (4 required) 2001401
27 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 8591803
29 Helical Lock Washer, 1/4 in.,
316 Stainless steel (as required) 2021607
30 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 8594206
31 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 8591206
32 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 Assembly
Key Description Part Number
1 Pallet Seal
3 in., 1 hole
0.01 in. thickness, Teon
®
8554822
0.02 in. thickness, Teon
®
8554823
0.03 in. thickness, Teon
®
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,
Teon
®
(For Stainless steel Pallet) 8554827
0.01 in. thickness, Teon
®
(For Polyphenylene Sulde [PPS] Pallet) 8554854
0.02 in. thickness, Teon
®
8554828
0.03 in. thickness, Teon
®
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, Teon
®
8554839
6 in., High Temperature
0.01 in. thickness, Teon
®
8554838
0.02 in. thickness, Teon
®
8554837
3 in., 10 hole
0.01 in. thickness, Teon
®
8554856
6 in., 10 hole
0.01 in. thickness, Teon
®
8554857
2 Upper Stem - - - - - - -
Teon
®
and Viton
®
are marks owned by E. I. du Pont de Nemours and Company.
13
860 and 960 Series
North America Only
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
North America Only
Figure 11. Models 960, 961 and 962 Assembly Drawing
- 860, 861, & 963 Exploded Drawing
960, 961, & 962 Exploded Drawing
15
860 and 960 Series
North America Only
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
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D103813X012 © 2015, 2017 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 10/17.
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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
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Tulsa, LLC does not assume responsibility for the selection, use or
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and maintenance of any Emerson Process Management Regulator
Technologies Tulsa, LLC product remains solely with the purchaser.
North America Only
Emerson Automation Solutions
Americas
McKinney, Texas 75070 USA
T +1 800 558 5853
+1 972 548 3574
Tulsa, OK 74146 USA
T +1 918 662 6161
Europe
Bologna 40013, Italy
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T +65 6770 8337
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