Industrial Regulators

BACK PRESSURE REGULATORS

MODEL CA-2

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 an even wider range of fluids.

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.

Body sizes:

Temperature range:

Body sizes:

MODEL CA-1

1/4", 3/8", 1/2"

-325° F to +400° F, (-198° C to +204° C)

1/8", 1/4", 3/8" and 1/2"

Materials: Body

Set pressures:

Flow designs:

316L SST

Springs for 5-500 psig, (0.34 - 34 barg)

Globe, Angle, Flow-thru

Materials: Body

Spring chamber

316 SST, BRZ

Pressure drop:

Forged Bronze, 316 SST

Trim Seat

316 SST

Up to 600 psid, (41 bard)

Spring chamber

Bronze, 316 SST

Metal – 316 SST Composition – TFE 302 SST, Neoprene, TFE-coated, 302 SST, FL Elastomer

Options:

Model 2171 is a stainless steel low-flow back pressure- regulator.

Trim Seat

316 SST

Cryogenic construction, inlet pressure gauge, special pharmaceutical/food industry construction

Metal

Diaphragm

The Models CA-1 and CA-2 are compact forged bronze back pressure regulators.

Diaphragm

302 SST, Buna-N

End connections: NPT Temperature range:

End connections: NPT, flanged

-325° F to +300° F, (-198° to +149° C)

Set pressures: CA1 – springs for 2-400 psig, (0.14 - 27 barg) CA2 – springs for 3-610 psig, (0.2- 42 barg) Options: Closing Caps, Cryogenic, Handwheel and Panel Mounting

Body sizes:

Temperature range:

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.

1-1/2", 2", 2-1/2", 3", 4"

-20° F to +450° F, (-29° C to +232° C)

MODEL 31-B

Body sizes:

End connections:

Materials: Body

Set pressures: 8311HP – springs for 10-145 psig, (0.69 - 10 barg) options 130-200 psig, (9 -13 barg) 8311LP – springs for 1-30 psig, (0.069 - 2 barg ) Pressure drop: Up to 260 psid, (18 bard) Options: Closing cap

1/2", 3/4", 1", 1-1/2" and 2" (20, 25, 40 and 50) NOTE: Inlet and outlet same size.

Standard: NPT Female Option-30: Weld-on 150# RF Flanges Option-32: Extended Plain End Nipples

CI, CS

The Model 31-B is a compact relief regulator designed expressly for use as a back pressure regulator or bypass valve for controlling inlet pressure between 2 and 16 inches - W.C. (mm H2O) range. Body is available in cast carbon steel or stainless steel materials only. Interior wetted trims for corrosive applications is standard.

Spring chamber

CI, DI, CS 316 SST

Trim Seat

Materials: Body

Temperature range:

Metal – 316 SST, Stellite

CS, SST Spring chamber CS, SST Trim 316 SST Seat

-30° F to 400° F, (-34° C to +204° C)

Diaphragm

302 SST, Neoprene, F.C. Elastomer

Set pressures:

Multiple springs covering 2.0" - 16.0" W.C. (50 - 400 mm H2O), (5 mbarg - 40 mbarg)

End connections: 1-1⁄2", 2"

The 31-B is a back pressure regulator that maintains set points as low as 2" W.C.

Buna-N, Silicone, TFE, FC. Elastomer Buna-N, F.C. Elastomer

– NPT, CI or CS

Options: NACE

The Models 8311HP and 8311LP are high-capacity regulators and ideal for remote installations.

All Sizes All Sizes

– 125#, 250# flange, CI – 150#, 300# flange, CS

Diaphragm