Emerson FISHER SR8 User manual

Type SR8 Sanitary Backpressure Regulator
W8967
!
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.
Fisher™ backpressure regulators must
be installed, operated and maintained
in accordance with federal, state and
local codes, rules and regulations and
Emerson Process Management Regulator
Technologies, Inc. instructions.
If a leak develops or if the outlet
continually vents liquid, service to the
unit may be required. Failure to correct
trouble could result in a hazardous
condition. Only a qualied person must
install or service the unit.
Installation, operation and maintenance
procedures performed by unqualied
personnel may result in improper
adjustment and unsafe operation. Either
condition may result in equipment
damage or personal injury. Use qualied
personnel when installing, operating
and maintaining the Type SR8 Sanitary
backpressure regulator.
Introduction
Type SR8 self-contained backpressure regulators
are suitable for pressure control of steam, liquid
or gaseous service. Typical set points range from
2 to 125 psi / 0.2 to 8.6 bar. The regulator is designed
to meet sanitary application and material requirements.
Scope of the Manual
This manual provides installation, startup,
maintenance and parts ordering information for the
Type SR8 Sanitary Backpressure Regulator.
Figure 1. Type SR8
Instruction Manual
D103100X012
January 2022
Type SR8

Tri-Clamp®is a mark owned by Tri-Clover Incorporated.
MAXIMUM
TEMPERATURE
MAXIMUM INLET
PRESSURE
MAXIMUM OUTLET
PRESSURE
°F °C psig bar psig bar
150 65 210 14.5 210 14.5
275 135 180 12.4 180 12.4
400 204 160 11 160 11
Principle of Operation
Pressure in the controlled system (regulator inlet
pressure) registers beneath the diaphragm of the
regulator and opposes the force provided by the
predetermined spring compression. When regulator
spring force exceeds diaphragm force exerted by
the inlet pressure, the spring will keep the valve plug
closed to prevent ow to the downstream system. As
inlet pressure increases above setpoint, this increase
registers on the diaphragm and the valve plug opens
to allow ow to the downstream system.
Specications
The Specications section on this page provides the ratings and other specications for the Type SR8. The
following information is stamped on the nameplate fastened on the regulator at the factory: type; body size;
maximum inlet, outlet and di󰀨erential pressure; maximum pressure above setpoint; maximum temperature; spring
range; cage type; trim and diaphragm material.
Body Size, Inlet and Outlet Connection Style
1/2, 3/4, 1, 1-1/2, 2 and 3 in. /
15, 20, 25, 40, 50 and 80 mm
End Connection(4)
Tri-Clamp®Sanitary connections
Body Pressure/Temperature Ratings(1)
Maximum Operating Pressures(1)(3)
See Table 1
Set Pressure Ranges
See Table 2
Maximum Di󰀨erential Pressures(1)
See Table 3
Regulator Temperature Capabilities(1)
See Table 4
Pressure Registration
Internal
Service Media
Steam, Gas and Liquid
Options
Vacuum protection
Pressure loaded spring case
T-handle adjusting screw
Pressure Loaded Spring Case Option
Maximum Loading Pressure
1/2 through 1-1/2 in. / 15 through 40 mm body:
125 psig / 8.62 bar
2 and 3 in. / 50 and 80 mm body:
60 psig / 4.14 bar
1/4 NPT tapped vent connection
Vacuum Protection Option
Maximum Vacuum Pressure
14 psig / 0.96 bar (vacuum)
Certications Available upon Request
FDA approved elastomers/plastics
Material and Functional Test Certicates
USP Class VI approved elastomers/plastics(2)
ADI free compliant elastomers/plastics(2)
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
2. Contact your local Sales O󰀩ce for details on available constructions.
3. Maximum pressure to prevent damage to internal parts and leakage to atmosphere.
4. End connection clamps and gaskets to be supplied by the user.
Table 1. Maximum Operating Pressures
BODY SIZE MAXIMUM TEMPERATURE MAXIMUM INLET PRESSURE MAXIMUM OUTLET PRESSURE
In. mm °F °C psig bar psig bar
1/2, 3/4, 1
and 1-1/2
15, 20, 25
and 40
150 65 210 14.5 210 14.5
275 135 180 12.4 180 12.4
400 204 160 11 160 11
2 and 3 50 and 80
150 65 150 10.3 150 10.3
275 135 125 8.62 125 8.62
400 204 110 7.58 110 7.58
2
Type SR8

Type SR8 Sanitary Backpressure Regulator
E0968
July 2008 Type SR8
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
Figure 2. Operational Schematic
Type SR8 Sanitary Backpressure Regulator
E0968
July 2008 Type SR8
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
E0968
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
Table 2. Set Pressure Ranges and Control Spring Data
BODY SIZE SET PRESSURE RANGE COLOR WIRE DIAMETER FREE LENGTH PART NUMBER
In. mm psig bar In. mm In. mm
1/2, 3/4 15, 20
2 to 8 0.2 to 0.5(1) Blue 0.138 3.51 2.75 69.9 GE06780X012
5 to 25 0.4 to 1.7 Silver 0.177 4.50 2.75 69.9 GE06781X012
10 to 50 0.7 to 3.4 Green 0.192 4.88 2.75 69.9 GE06782X012
35 to 100 2.4 to 6.9 Red 0.225 5.72 2.75 69.9 GE06783X012
75 to 125 5.2 to 8.6 Red
Yellow
0.225
0.148
5.72
3.76
2.75
2.75
69.9
69.9
GE06783X012
GE06784X012
1, 1-1/2
full port
1-1/2 x 1
25, 40
full port
40 x 25
2 to 8 0.2 to 0.5(1) Blue 0.225 5.72 3.25 82.6 GE02763X012
5 to 25 0.4 to 1.7 Silver 0.282 7.16 3.25 82.6 GE02764X012
15 to 70 1.0 to 4.8 Green 0.331 8.41 3.25 82.6 GE02765X012
25 to 90 1.7 to 6.2 Red 0.362 9.19 3.25 82.6 GE02766X012
35 to 100 2.4 to 6.9 Green
Yellow
0.331
0.250
8.41
6.35
3.2
3.25
82.6
82.6
GE02765X012
GE06090X012
75 to 125 5.2 to 8.6 Red
Yellow
0.362
0.250
9.19
6.35
3.25
3.25
82.6
82.6
GE02766X012
GE06090X012
2 and 3 50 and 80
10 to 25 0.7 to 1.7 Silver 0.562 14.3 6 152.4 GE14003X012
15 to 50 1.0 to 3.4 Green 0.625 15.9 6 152.4 GE14004X012
25 to 60 1.7 to 4.1 Red 0.625 15.9 6 152.4 GE14005X012
1. The 2 to 8 psig / 0.14 to 0.55 bar spring is not available with the metal diaphragm.
Table 3. Maximum Dierential Pressures
BODY SIZE OUTLET PRESSURE RANGE COLOR MAXIMUM DIFFERENTIAL PRESSURE
In. mm psig bar psid bar d
1/2, 3/4 15, 20
2 to 8 0.2 to 0.5 Blue 15 1.0
5 to 25 0.4 to 1.7 Silver 40 2.7
10 to 50 0.7 to 3.4 Green 100 6.9
35 to 100 2.4 to 6.9 Red 140 9.6
75 to 125 5.2 to 8.6 Red/Yellow 160 11
1, 1-1/2 full port
1-1/2 x 1
25, 40 full port
40 x 25
2 to 8 0.2 to 0.5 Blue 15 1.0
5 to 25 0.4 to 1.7 Silver 40 2.7
15 to 70 1.0 to 4.8 Green 100 6.9
25 to 90 1.7 to 6.2 Red 125 8.6
35 to 100 2.4 to 6.9 Green/Yellow 140 9.6
75 to 125 5.2 to 8.6 Red/Yellow 160 11
2 and 3 50 and 80
10 to 25 0.7 to 1.7 Silver 50 3.4
15 to 50 1.0 to 3.4 Green 75 5.2
25 to 60 1.7 to 4.1 Red 75 5.2
3
Type SR8

!
WARNING
Regulators should be installed, operated
and maintained in accordance with
federal, state and local codes, rules and
regulations and Fisher™ instructions.
If a leak develops in the system,
it indicates service is required.
Failure to take the regulator out of
service immediately may create a
hazardous condition.
Installation
Clean out all pipelines before installation of the
regulator and check to be sure the regulator has not
been damaged or collected foreign material during
shipping. The regulator may be installed in any
position desired. However, to ensure self-draining
(from inlet to outlet) the regulator should be installed
with the spring case in the upright vertical position.
The arrow on the body indicates ow direction.
The piping ange to regulator end connection
ange clamps and gaskets are supplied by the
user. Clamp gaskets must be compatible with the
system requirements. Install and tighten clamps to
manufacturer’s specications.
Note
It is important that the regulator be
installed so that the vent hole in the
spring case is unobstructed at all times.
Pressure Loaded Construction
The spring case can be pressure loaded to adjust set
pressure. An optional tapped spring case, guide ring
seal and sealing washer on the adjusting screw must
be used for these applications. The loading pressure is
connected to the 1/4 NPT connection in the spring case
allowing registration on the spring side of the diaphragm.
Adjusting loading pressure will proportionally change
the pressure setting of the regulator. A small amount of
mechanical spring load, in addition to the pressure load, is
recommended. Regulator set pressure achieved from the
combination of spring load and pressure load should not
exceed the set pressure ranges listed in Table 2.
CLOSING CAP
ADJUSTING SCREW
LOCKNUT
SPRING CASE
UPPER SPRING SEAT
SPRING
HEX NUT
SPLIT WASHER
FLAT WASHER
LOWER SPRING SEAT
PISTON RING
(SPRING SIDE UP)
GUIDE RING
DIAPHRAGM
PLUG O-RING
PLUG
SANITARY CLAMP
BODY
Figure 3. Type SR8 Exploded View
4
Type SR8

!
WARNING
!
WARNING
Over pressuring any portion of this
equipment may result in equipment
damage, leaks in the valve or personal
injury due to bursting of pressure-
containing parts. The system should be
inspected after any overpressure condition.
Startup
The regulator is factory set to the midpoint of the
spring range. Please refer to the Adjustment section
for directions on changing the setpoint. With proper
installation completed, slowly open the upstream and
downstream shuto󰀨 valves.
Note
When the pressure load option is used,
always open block valves on main line
before applying loading pressure to the
spring case to avoid diaphragm damage.
Adjustment
The setting of the regulator can be varied within the
pressure range stamped on the nameplate. Setpoint is
dened as the point the regulator starts to open. Build
up above setpoint is required to achieve maximum
capacity. To change the setpoint, loosen the locknut
(key 17, Figure 4) or locking lever (key 22, Figure 4) and
turn the adjusting screw (key 18, Figure 4) clockwise to
increase the setpoint or counterclockwise to decrease
it. Monitor the inlet pressure with a test gauge during
the adjustment. Tighten the locknut or locking lever to
maintain the desired setting. Available set pressure
ranges, recommended maximum allowable di󰀨erential
pressures and spring data are shown in Tables 2 and 3.
Shutdown
Close the upstream shuto󰀨 valve. Close downstream
shuto󰀨 valve. Open the applicable bleed valves to
exhaust the system.
Note
When the pressure loaded option is
used, bleed all pressure from the spring
case before bleeding pressure under the
diaphragm to avoid internal part damage.
Maintenance
Before disassembling the regulator,
isolate it from the pressure system and
release all pressure from the regulator
as specied in the Shutdown section.
Relieve all spring compression and isolate
regulator from the pressurized system
prior to removing the clamp (key 15).
Due to normal wear that may occur, parts must be
periodically inspected and replaced if necessary.
The frequency of inspection depends on the severity
of service conditions. A preventative maintenance
schedule should be implemented that checks regulator
setpoint and lockup and that evaluates regulator
performance to the system requirements. Regulator
performance outside the system requirements will
require either adjustment, part maintenance or
regulator replacement to meet system requirements.
This section includes instructions for disassembly
and replacement of parts. All key numbers refer to
Figure 4 or 5.
Table 4. Temperature Capabilities
SEAT TYPE DIAPHRAGM MATERIAL O-RING MATERIAL TEMPERATURE RANGE
°F °C
Metal
(Stainless steel)
Ethylene Propylene Diene (EPDM) EPDM -20 to 275 -28 to 135
Stainless steel PTFE/Fluorocarbon (FKM)(1) 20 to 400 -6 to 204
PTFE/Fluorocarbon (FKM) PTFE/Fluorocarbon (FKM) 20 to 400 -6 to 204
Soft
(Polytetrauoroethylene (PTFE)/
Stainless steel)
EPDM EPDM -20 to 150 -28 to 65
Stainless steel PTFE/Fluorocarbon (FKM)(1) 20 to 150 -6 to 65
PTFE/Fluorocarbon (FKM) PTFE/Fluorocarbon (FKM) 20 to 150 -6 to 65
Soft
(Polyether Ether Ketone (PEEK)/
Stainless steel)
EPDM EPDM -20 to 275 -28 to 135
Stainless steel PTFE/Fluorocarbon (FKM)(1) 20 to 400 -6 to 204
PTFE/Fluorocarbon (FKM) PTFE/Fluorocarbon (FKM) 20 to 400 -6 to 204
1. O-ring material is PTFE for the 1/2 and 3/4 in. / 15 and 20 mm sizes. Temperature range is the same.
5
Type SR8

1. If damage to the diaphragm or seating surface is
suspected or to inspect other internal parts, loosen
the locknut (key 17) or locking lever (key 22) and
turn the adjusting screw (key 18) counterclockwise
to remove all spring compression.
2. Loosen the sanitary clamp (key 15) to
remove the spring case (key 14). Remove the
upper spring seat (key 11) and the regulator
spring (keys 12 and 13, when applicable).
3. Remove the diaphragm assembly and plug from
the body (key 1). Inspect parts for damage.
Note
When disassembling a unit with a metal
diaphragm, replace both diaphragm
gaskets (key 6) to ensure a good seal at
the diaphragm ange.
Replace the piston ring (key 5), if it has
been removed from the guide ring (key 9).
Take care not to damage the piston ring
during replacement.
4. If parts require replacement, loosen the nut (key 16)
while holding wrench ats on plug (key 3) and
remove the lock washer (key 24) and at washer
(key 23). The lower spring seat (key 8), guide ring
(key 9), diaphragm (key 7) and plug O-ring (key 3)
can now be removed from the plug (key 2). An
optional lower diaphragm plate (key 10) and O-ring
(key 4) are included for the constructions o󰀨ering
protection against vacuum conditions.
5. Replace any damaged parts. Refer to the section
titled Soft Seat Maintenance when the seat needs
to be replaced.
6. Reassemble in the reverse order of the above
procedure. The order is listed below or refer
to Figure 3.
a. Plug (key 2)
b. Plug O-ring (key 3)
c. Diaphragm plate (key 10) (vacuum
protection construction only)
d. Diaphragm plate O-ring (key 4) (vacuum
protection construction only)
e. Diaphragm gasket (key 6) (Metal
diaphragms only)
f . Diaphragm (key 7)
g. Diaphragm gasket (key 6) (Metal
diaphragms only)
h. Guide ring assembly (keys 9 and 5)
i . Lower spring seat (key 8)
j . Flat Washer (key 23)
k. Lock Washer (key 24)
l . Hex Nut (key 16)
7. Hold wrench ats on plug (key 2), then torque hex
nut (key 16) to 6 to 8 in-lbs / 0.7 to 0.9 N•m for
the 1/2 and 3/4 in. / 15 and 20 mm, 5 to 7 ft-lbs /
7 to 9 N•m for the 1 and 1-1/2 in. / 25 and 40 mm
and 28 to 30 ft-lbs / 38 to 41 N•m for 2 and 3 in. /
50 and 80 mm. After tightening the hex nut, apply
threadlocker medium/high strength sealant or
equivalent to the nut/thread interface.
8. Position diaphragm assembly in body (key 1).
Replace regulator spring (keys 12 and 13, when
applicable) and upper spring seat (key 11).
Replace the spring case (key 14) and sanitary
clamp (key 15). Torque clamp nuts to 20 to
22 ft-lbs / 27 to 30 N•m for the 1/2 through
1-1/2 in. / 15 mm through 40 and 38 to 40 ft-lbs /
52 to 54 N•m for the 2 and 3 in. / 50 and 80 mm.
Note
Lubricate the adjusting screw (key 18)
threads and the sanitary clamp bolt
threads (key 15) to reduce galling of
Stainless steel. Factory recommends
anti-seize lubricant.
Keep even spacing between clamp
halves when tightening clamp nuts.
This will ensure even loading of the
diaphragm. If clamp halves touch, please
contact factory for a replacement clamp.
9. Follow Startup and Adjustment procedures.
Soft Seat Maintenance
Take care not to damage the internal/wetted surface
nish when performing Soft Seat Maintenance.
1. Disassemble the regulator as stated in the
prior section.
2. To access soft seat (key 28), unscrew the lower
plug (key 27) from the upper plug (key 26). If
damaged, replace with new part. Apply Loctite 246
or equivalent to external thread before tightening.
Proper torque for the assembly is 6 to 8 in-lbs /
0.7 to 0.9 N•m for the 1/2 and 3/4 in. / 15 and
20 mm; 8 to 10 in-lbs / 0.9 to 1.1 N•m for the 1 and
1-1/2 x 1 in. / 25 and 40 x 25 mm; and 5 to 7 ft-lbs /
7 to 9 N•m for the 1-1/2 in. / 40 mm. Torque for 2 and
3 in. / 50 and 80 mm is 23 to 25 ft-lbs / 31 to 34 N•m.
3. Reassemble as stated in the prior section.
6
Type SR8

Parts Ordering
When corresponding with your local Sales O󰀩ce or
sales representative about this equipment, always
reference the equipment serial number and FS number
that can be found on the nameplate.
When ordering replacement parts, reference the key
number of each needed part as found in the following
parts list. Separate kits containing all recommended
spare parts are available.
Parts List
Key Description Part Number
Parts Kits
Diaphragm Kits (includes keys 3, 5 and 7. Stainless
steel kits include key 6, quantity 2). Does not include all
applicable parts for changing between elastomer and metal
diaphragm constructions. See parts list for di󰀨erences.
1/2 and 3/4 in. / 15 and 20 mm bodies
EPDM diaphragm and O-ring RSR58X00E12
Stainless steel Diaphragm
and PTFE/Fluorocarbon (FKM) O-rings RSR58X00S12
PTFE/Fluorocarbon (FKM)
Diaphragm and O-rings RSR58X00V12
1 and 1-1/2 in. / 25 and 40 mm bodies
EPDM diaphragm and O-rings RSR58X00E22
Stainless steel Diaphragm
and PTFE/Fluorocarbon (FKM) O-rings RSR58X00S22
PTFE/Fluorocarbon (FKM)
Diaphragm and O-rings RSR58X00V22
2 and 3 in. / 50 and 80 mm bodies
EPDM diaphragm and O-rings RSR58X00E32
Stainless steel Diaphragm
and PTFE/Fluorocarbon (FKM) O-rings RSR58X00S32
Soft Seat Kits (include keys 26, 27 and 28)
1/2 in. / 15 mm body
PTFE/Stainless steel GE06788X012
PEEK/Stainless steel GE06788X022
3/4 in. / 20 mm body
PTFE/Stainless steel GE06797X012
PEEK/Stainless steel GE06797X022
1 in. / 25 mm body
PTFE/Stainless steel GE06323X012
PEEK/Stainless steel GE06323X022
1-1/2 in. / 40 mm body
PTFE/Stainless steel GE06324X012
PEEK/Stainless steel GE06324X022
2 and 3 in. / 50 and 80 mm bodies
PTFE/Stainless steel GE14009X012
PEEK/Stainless steel GE14009X022
1 Body
1/2 in. / 15 mm body GE07951X012
3/4 in. / 20 mm body GE07952X012
1 in. / 25 mm body GE07949X012
1-1/2 in. / 40 mm body GE07950X012
1-1/2 x 1 in. / 40 x 25 mm body GE07776X012
2 in. / 50 mm body GE13988X012
3 in. / 80 mm body GE13989X012
2 Plug (metal seat)
1/2 in. / 15 mm body GE06786X012
3/4 in. / 20 mm body GE06795X012
1 and 1-1/2 x 1 in. /
25 and 40 x 25 mm bodies GE06039X012
1-1/2 in. / 40 mm body GE06191X012
2 and 3 in. / 50 and 80 mm bodies GE14007X012
Key Description Part Number
3 Plug O-ring
1/2 and 3/4 in. / 15 and 20 mm bodies
Elastomer diaphragms
EPDM 1H2919X0022
PTFE/Fluorocarbon (FKM) 1P8453X0042
Stainless steel diaphragms
PTFE GE10788X012
EPDM 14B1935X032
1 and 1-1/2 in. / 25 and 40 mm bodies
Elastomer diaphragms
EPDM 1D2888X0042
PTFE/Fluorocarbon (FKM) 1C7822X0142
Stainless steel diaphragms
PTFE/Fluorocarbon (FKM) 16A6903X022
EPDM 14A1968X042
2 and 3 in. / 50 and 80 mm bodies
Elastomer diaphragms
EPDM 1B8855X0112
PTFE/Fluorocarbon (FKM) 12A0006X022
Stainless steel diaphragms
PTFE/Fluorocarbon (FKM) 12A0006X022
EPDM 1B8855X0112
4 Diaphragm Plate O-ring
1 and 1-1/2 in. / 25 and 40 mm bodies
EPDM 1V3234X0042
PTFE/Fluorocarbon (FKM) 1V3234X0052
2 and 3 in. / 50 and 80 mm bodies
EPDM 1V3303X0082
PTFE/Fluorocarbon (FKM) 1V3303X0092
5 Piston Ring
1/2 and 3/4 in. / 15 and 20 mm bodies GE09274X012
1 and 1-1/2 in. / 25 and 40 mm bodies GE09273X012
2 and 3 in. / 50 and 80 mm bodies GE14027X012
6 Diaphragm Gasket, for use with
316L Stainless steel diaphragm only,
PTFE (2 required)
1/2 and 3/4 in. / 15 and 20 mm bodies GE06772X012
1 and 1-1/2 in. / 25 and 40 mm bodies GE06076X012
2 and 3 in. / 50 and 80 mm bodies GE13995X012
7 Diaphragm
1/2 and 3/4 in. / 15 and 20 mm bodies
EPDM GE06778X012
Stainless steel GE06777X012
PTFE/Fluorocarbon (FKM) GE06779X012
1 and 1-1/2 in. / 25 and 40 mm bodies
EPDM GE02299X012
Stainless steel GE02643X012
PTFE/Fluorocarbon (FKM) GE06086X012
2 and 3 in. / 50 and 80 mm bodies
EPDM GE14001X012
Stainless steel GE14000X012
PTFE/Fluorocarbon (FKM) GE14002X012
8 Lower Spring Seat
1/2 and 3/4 in. / 15 and 20 mm bodies
Without Vacuum Protection GE06774X012
1, 1-1/2 and 1-1/2 x 1 in. /
25, 40 and 40 x 25 mm bodies
Without Vacuum Protection GE06330X012
With Vacuum Protection GE02638X012
2 and 3 in. / 50 and 80 mm bodies
Without Vacuum Protection GE13997X012
With Vacuum Protection GE13998X012
9 Guide Ring
1/2 and 3/4 in. / 15 and 20 mm bodies GE06770X012
1 and 1-1/2 in. / 25 and 40 mm bodies GE02637X012
2 and 3 in. / 50 and 80 mm bodies
For EPDM/ Stainless steel Diaphragm GE13994X012
For PTFE/Fluorocarbon (FKM) Diaphragm GE29277X012
7
Type SR8

Key Description Part Number
10 Diaphragm Plate
1, 1-1/2 and 1-1/2 x 1 in. /
25, 40 and 40 x 25 mm bodies GE02642X012
2 and 3 in. / 50 and 80 mm bodies GE13999X012
11 Upper Spring Seat
1/2 and 3/4 in. / 15 and 20 mm bodies GE06773X012
1, 1-1/2 and 1-1/2 x 1 in. /
25, 40 and 40 x 25 mm bodies GE02639X012
2 and 3 in. / 50 and 80 mm bodies GE13996X012
12 Spring See Table 2
13 Spring
1/2 and 3/4 in. / 15 and 20 mm bodies GE06784X012
1, 1-1/2 and 1-1/2 x 1 in. /
25, 40 and 40 x 25 mm bodies GE06090X012
14 Spring Case
1/2 and 3/4 in. / 15 and 20 mm bodies
CF8M Stainless steel
Standard GE06767X012
Pressure Loaded GE06768X012
316 Stainless steel
Standard GE17730X012
Pressure Loaded GE14020X012
1 and 1-1/2 in. / 25 and 40 mm bodies
CF8M Stainless steel
Standard GE02641X012
Pressure Loaded GE06118X012
316 Stainless steel
Standard GE17755X012
Pressure Loaded GE14021X012
2 and 3 in. / 50 and 80 mm bodies
CF8M Stainless steel
Standard GE13992X012
Pressure Loaded GE13991X012
316 Stainless steel
Standard GE14018X012
Pressure Loaded GE14019X012
15 Bolted Clamp
1/2 and 3/4 in. / 15 and 20 mm bodies GE06769X012
1 and 1-1/2 in. / 25 and 40 mm bodies GE06116X012
2 and 3 in. / 50 and 80 mm bodies GE13993X012
16 Hex Nut
1/2 and 3/4 in. / 15 and 20 mm bodies 10A1341X022
1 and 1-1/2 in. / 25 and 40 mm bodies 1A309338992
2 and 3 in. / 50 and 80 mm bodies T1208735252
17 Hex Nut
1/2 and 3/4 in. / 15 and 20 mm bodies 1A3465X0032
1 and 1-1/2 in. / 25 and 40 mm bodies T1208635252
2 and 3 in. / 50 and 80 mm bodies 1A3511X0072
18 Adjusting Screw
1/2 and 3/4 in. / 15 and 20 mm bodiess
Standard GE08849X012
T-Handle GE08987X012
1 and 1-1/2 in. / 25 and 40 mm bodies
Standard GE06080X012
T-Handle GE08985X012
2 and 3 in. / 50 and 80 mm bodies
Standard GE14024X012
T-Handle GE14025X012
Key Description Part Number
19 Closing Cap
1/2, 3/4, 1 and 1-1/2 in. /
15, 20, 25 and 40 mm bodies
Stainless steel 1E5433X0032
Plastic 20B3082X012
2 and 3 in. / 50 and 80 mm bodies GE14028X012
20 Flow Arrow - - - - - - - - - - -
21 Nameplate - - - - - - - - - - -
22 Locking Lever
1/2 and 3/4 in. / 15 and 20 mm bodies GE08989X012
1 and 1-1/2 in. / 25 and 40 mm bodies GE08988X012
2 and 3 in. / 50 and 80 mm bodies GE14026X012
23 Flat Washer
1/2 and 3/4 in. / 15 and 20 mm bodies 1C3329X0022
1 and 1-1/2 in. / 25 and 40 mm bodies GC060805X22
2 and 3 in. / 50 and 80 mm bodies 1A5189X0022
24 Lock Washer
1/2 and 3/4 in. / 15 and 20 mm bodies 1H3395X0012
1 and 1-1/2 in. / 25 and 40 mm bodies 1C2257K0012
2 and 3 in. / 50 and 80 mm bodies 1A639638992
25 Sealing Washer
1/2 and 3/4 in. / 15 and 20 mm bodies 12A3880X012
1 and 1-1/2 in. / 25 and 40 mm bodies GE20712X022
2 and 3 in. / 50 and 80 mm bodies 1V424699012
26 Upper Plug
1/2 in. / 15 mm body GE06792X012
3/4 in. / 20 mm body GE06801X012
1 and 1-1/2 x 1 in. / 25 and 40 x 25 mm bodies GE06325X012
1-1/2 in. / 40 mm body GE06326X012
2 and 3 in. / 50 and 80 mm bodies GE14013X012
27 Lower Plug
1/2 in. / 15 mm body GE06793X012
3/4 in. / 20 mm body GE06802X012
1 and 1-1/2 x 1 in. / 25 and 40 x 25 mm bodies GE06327X012
1-1/2 in. / 40 mm body GE06328X012
2 and 3 in. / 50 and 80 mm bodies GE14014X012
28 Soft Seat
1/2 in. / 15 mm body
PTFE GE06789X012
PEEK GE06789X022
3/4 in. / 20 mm body
PTFE GE06798X012
PEEK GE06798X022
1 and 1-1/2 x 1 in. / 25 and 40 x 25 mm bodies
PTFE GE06197X012
PEEK GE06197X022
1-1/2 in. / 40 mm body
PTFE GE06200X012
PEEK GE06200X022
2 and 3 in. / 50 and 80 mm bodies
PTFE GE14010X012
PEEK GE14010X022
29 Drive Screw (2 required) 1E953028982
32 Guide Ring Seal
1/2 and 3/4 in. / 15 and 20 mm bodies GE18400X012
1 and 1-1/2 in. / 25 and 40 mm bodies GE18399X012
2 and 3 in. / 50 and 80 mm bodies GE11039X012
8
Type SR8

6
7
6
9
14
15
1
35
S2
19
18
17
16
24
23
8
9
5
15
7
3
2
1
11
12
14
13
18
22
21
29
20 29
AA
8
9
74
10
3
15
7
6
6
9
14
1
26
28
27
L
S1
L
T-HANDLE OPTION
STANDARD BACKPRESSURE REGULATOR
WITH ELASTOMERIC DIAPHRAGM
VIEW A
ROTATED 180°
SOFT SEAT OPTION
VIEW B – METAL DIAPHRAGM FOR STANDARD REGULATOR VACUUM PROTECTION OPTION
Figure 4. Type SR8 Backpressure Sanitary Regulator Assembly Drawing
1/2 through 1-1/2 In. / 15 through 40 mm Sizes
APPLY LUBRICANT (L) / SEALANT (S)(1):
L = ANTI-SEIZE LUBRICANT
S1 = THREADLOCKER MEDIUM/HIGH STRENGTH SEALANT
S2 = HIGH TEMPERATURE AND MEDIUM STRENGTH THREADLOCKER SEALANT
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
9
Type SR8

6
73
B
L
11
12
14
13
32
S1
19
18
17
25
16
24
23
8
5
15
7
3
2
1
9
6
7
32
METAL DIAPHRAGM OPTION VIEW B
APPLY LUBRICANT (L) / SEALANT (S)(1):
L = ANTI-SEIZE LUBRICANT
S1 = THREADLOCKER MEDIUM/HIGH STRENGTH SEALANT
S2 = HIGH TEMPERATURE AND MEDIUM STRENGTH THREADLOCKER SEALANT
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
Figure 5. Type SR8 Sanitary Backpressure Regulator Assembly with Pressure Loaded Spring Case
1/2 through 1-1/2 In. / 15 through 40 mm Sizes
10
Type SR8

19
18
17
14
11
12
8
9
5
15
7
3
2
1
16
24
23
L
S1
18
22 L
21
29
20
L
A
733
1047
7
27
1
28
26 S2
6
6
T-HANDLE OPTION
SOFT SEAT OPTION
DETAIL A
VACUUM PROTECTION OPTION METAL DIAPHRAGM OPTION
APPLY LUBRICANT (L) / SEALANT (S)(1):
L = ANTI-SEIZE LUBRICANT
S1 = THREADLOCKER MEDIUM/HIGH STRENGTH SEALANT
S2 = HIGH TEMPERATURE AND MEDIUM STRENGTH THREADLOCKER SEALANT
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
Figure 6. Type SR8 Backpressure Sanitary Regulator Assembly Drawing
2 and 3 In. / 50 and 80 mm Sizes
11
Type SR8

19
18
17
14
11
12
8
9
5
15
7
3
2
1
25
16
24
23
32
L
S1
32
6
6
7
3 7
3
7104
A
APPLY LUBRICANT (L) / SEALANT (S)(1):
L = ANTI-SEIZE LUBRICANT
S1 = THREADLOCKER MEDIUM/HIGH STRENGTH SEALANT
S2 = HIGH TEMPERATURE AND MEDIUM STRENGTH THREADLOCKER SEALANT
1. Lubricant and sealant must be selected such that they meet the temperature requirements.
DETAIL A
VACUUM PROTECTION OPTION METAL DIAPHRAGM OPTION
Figure 7. Type SR8 Sanitary Backpressure Regulator Assembly with Pressure Loaded Spring Case
2 and 3 In. / 50 and 80 mm Sizes
Type SR8
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