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Type SR8
Specifications
The Specifications section on this page provides the ratings and other specifications 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 differential 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
MAXIMUM
MAXIMUM INLET
TEMPERATURE
PRESSURE
°F
°C
psig
150
65
210
275
135
180
400
204
160
Maximum Operating Pressures
See Table 1
Set Pressure Ranges
See Table 2
Maximum Differential Pressures
See Table 3
Regulator Temperature Capabilities
See Table 4
Pressure Registration
Internal
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 Office 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.
BODY SIZE
In.
mm
1/2, 3/4, 1
15, 20, 25
and 1-1/2
and 40
2 and 3
50 and 80
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
Tri-Clamp
is a mark owned by Tri-Clover Incorporated.
®
2
(1)
MAXIMUM OUTLET
PRESSURE
bar
psig
bar
14.5
210
14.5
12.4
180
12.4
11
160
11
(1)(3)
(1)
(1)
Table 1. Maximum Operating Pressures
MAXIMUM TEMPERATURE
°F
°C
150
65
275
135
400
204
150
65
275
135
400
204
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)
Certifications Available upon Request
FDA approved elastomers/plastics
Material and Functional Test Certificates
USP Class VI approved elastomers/plastics
ADI free compliant elastomers/plastics
MAXIMUM INLET PRESSURE
psig
bar
210
14.5
180
12.4
160
11
150
10.3
125
8.62
110
7.58
spring force exceeds diaphragm force exerted by
the inlet pressure, the spring will keep the valve plug
closed to prevent flow to the downstream system. As
inlet pressure increases above setpoint, this increase
registers on the diaphragm and the valve plug opens
to allow flow to the downstream system.
(2)
(2)
MAXIMUM OUTLET PRESSURE
psig
bar
210
14.5
180
12.4
160
11
150
10.3
125
8.62
110
7.58
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