The Bellofram 961-159-000 Type 79 High Flow Precision Volume Booster/Air Relay uses an air pilot signal to accurately control output pressure over a wide range of flow and supply pressure variations. Superior rolling diaphragm design provides greater sensitivity, lower droop, and improved accuracy when compared to most competitive general purpose flat diaphragm regulators. These regulators are self-relieving and utilize a 1:1 ratio pilot signal vs. output pressure. An electro-pneumatic regulator, transducer or remote pilot regulator typically supplies this pilot signal. Careful design and quality materials throughout assure long, trouble-free operation. Regulators can be pipe mounted or use optional mounting bracket.
Port Size
1" NPT with 1/4" NPT gauge port
Pressure Range
0-200 PSI
Flow Capacity
>125 SCFM @ 20 PSI signal and 100 PSI supply
Maximum Supply Pressure
400 PSI
Maximum Signal Pressure
200 PSI
Sensitivity
1" water column
Exhaust Capacity
31 SCFM at 5 PSIG above 20 PSIG setpoint
Supply Pressure Sensitivity
0.35 PSI per 100 PSI change
Ratio Accuracy
<1.5% typical
Housing Material
Die cast zinc and aluminum, vinyl paint
Diaphragm
Nitrile rolling diaphragm
Ambient Temperature
-40 to 200 °F
Mounting
In-line pipe or optional bracket
Customer
Technical