Back Pressure Regulators  

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Model 123

With four body materials and sixteen trim material combinations, the Model 123 is compatible with most fluids. It can handle a wide range of flows and pressure settings to match nearly any back-pressure application up to a 2" line size. The regulator uses four composition seat materials and controlled compression with metal-to-metal back-up for long life and trouble-free operation.

Specifications
Body Sizes 1/2", 3/4", 1", 11/2", 2"
Materials Body/spring chamber - CI, BRZ, CS, 316 SST/CI,
BRZ, CS, 316 SST
Trim - Phos. BRZ, BR, 302 SST, 416 SST, 316 SST,
Buna-N, Neoprene, TFE, F.C. Elastomer, EPDM
Seats - Metal - BR, 416 SST, 316 SST,
Stellite Composition - Buna-N, TFE, EPR, F.C. Elastomer
Diaphragm - BRZ, 302 SST, Neoprene, F.C. Elastomer, EPDM
End Connections NPT, flanged, extended nipples, socket weld
Temperature Range -325F to +450F
Pressures Inlet: 2 to 350 psig
Pressure Drop Up to 525 psid
Options Closing cap, cryogenic construction, differential construction,
NACE service
Model 123

 

Model BQ

The Model BQ is designed for lower-flow installations to control flow rates not covered by Model 123. It is often used in economizer circuits. It is also a popular cryogenic regulator and widely used in chemical process services.

Specifications
Body Sizes 1/4", 3/8", 1/2"
Materials Body/spring chamber - CI, BRZ, CS, SST/CI, BRZ, CS, SST
Trim - BRZ, 316 SST
Seat - Metal - Composition - BUNA-N, TFE, EPR

Diaphragm - BRZ, 302 SST, Neoprene, EPDM, Elgiloy
End Connections NPT
Temperature Range -325F to +600F
Pressures Inlet: up to 400 psig
Pressure Drop Up to 400 psid
Options Closing cap, cryogenic construction, differential construction
Model BQ

 

Model 1171

The Model 1171 is a back pressure/relief regulator suitable for most liquid and gas applications - including pump by-pass and modulating back pressure relief services.

Specifications
Body Sizes 1/4", 3/8"
Materials Body/spring chamber - BRZ/BRZ
Trim - BR
Seats - Metal - BR
Composition - TFE
Diaphragm - Phos. BRZ, Neoprene
End Connections NPT
Temperature Range -325F to +400F
Pressures Inlet: up to 400 psig
Pressure Drop Up to 400 psid
Options Inlet pressure gauge, panel mounting, cryogenic construction
Model 1171

 

Model 1164

The Model 1164 is equipped with a variety of body and trim materials that make it compatible with many fluids and chemicals. Its large orifice and diaphragm combine sensitivity with high capacity.

Specifications
Body Sizes 3/4", 1", 1 1/2", 2"
Materials Body/spring chamber - CI, BRZ, CS/CI, BRZ, CS
Trim - 416 SST, 316 SST
Seats - Metal - 316 SST
Composition - TFE
Diaphragm - Phos. BRZ TFE-coated 302 SST
End Connections NPT
Temperature Range -20F to +400F
Pressures Inlet: up to 225 psig
Pressure Drop Up to 225psid
Model 1164

 

Model 2171

Model 2171 is similar in design and capacity to its brass- bodied counterpart, but its SST body and trim enable it to handle and even wider range of fluids.

Specifications
Body Sizes 1/4", 3/8"
Materials Body/spring chamber - 316L SST/316 SST, BRZ
Trim - 316 SST
Seats - Metal -
Composition - TFE
Diaphragm - 302 SST, Neoprene
End Connections NPT
Temperature Range -325F to +400F
Pressures Inlet: up to 600 psig
Pressure Drop Up to 600 psid
Options Cryogenic construction, Inlet pressure gauge, special pharmaceutical/food industry construction
Model 2171

 

Model 6987

This heavy-duty, angle-bodied regulator can handle high inlet and outlet pressures plus high pressure drops. Six range springs provide wide setpoint selection. Applications include fuel oil, water, inert gases, air, and chemicals.

Specifications
Body Sizes 1/2", 3/4"
Materials Body/spring chamber - CS, SST/CS, SST
Trim - 316 SST
Seats - Metal - 316 SST, Stellite
Diaphragm - 302 SST
End Connections Standard - NPT
Optional - Flanged 300# or 600#, plain end pipe nipples
Temperature Range -20F to 450F
Pressures Inlet: up to 1500 psig
Set Pressures Springs for 50-800 psig
Pressure Drop Up to 960 psid
Options Closing cap, reducing orifice seats
Model 6987

 

Model 8311HP & 8311LP

When air and electric controls are not available, these reliable high-capacity regulators can be used in place of control valves. Dual-port construction makes these our highest-capacity back pressure regulators. Both models share the same basic design, differing only in diaphragm size.

Specifications
Body Sizes 1 1/2", 2", 2 1/2", 3", 4"
Materials Body/spring chamber - CI, CS/CI, CS
Trim - 316 SST
Seats - Metal - 316 SST, Stellite
Diaphragm - 302 SST, Neoprene, F.C. Elastomer
End Connections 1 1/2", 2" - NPT, CI or CS
All sizes - 125#, 250# flange, CI
All sizes - 150#, 300# flange, CS
Temperature Range -20F to +450F
Pressures 8311HP - Inlet: up to 260 psig
8311LP - Inlet up to 39 psig
Set Pressures 8311HP - Springs for 10-145 psig, options 145-200 psig
8311LP - Springs for 1-30 psig
Pressure Drop Up to 260 psid
Options Closing cap
Model 8311HP & 8311LP

 

Model CA-1 & CA-2

Designed for lower flow applications. It is often used in small pump set applications as well as the cryogenic and compressed gas industry. Metal lapped seats allow for leakage rate to approach levels of composition seats.

Specifications
Body Sizes 1/8", 1/4", 3/8", and 1/2"
Flow Designs Globe, Angle, Flow-Thru
Materials Body/spring chamber - Forged Bronze, Bronze
Trim - 316 SS
Seat - Metal
Diaphragm - 302 SST, BUNA-N
End Connections NPT
Temperature Range -325F to 300F
Pressures Up to 360 psid
Options Closing caps, Cryogenic, Handwheel, and Panel Mounting
Model CA-1 & CA-2

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