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Reference
70-6925 57
RP922 Pneumatic Potentiometer
A three-port pneumatic potentiometer can sum two input
pressures, average two input pressures, be an adjustable flow
restriction, or be an adjustable pressure supply. Replacement
devices are available for Johnson, Powers, Robertshaw, Barber-
Colman, and older Honeywell devices.
• High efficiency integral filters for all ports.
• High reliability, no internal moving parts.
• Compact size.
• High accuracy.
Typical Wiring Diagram for RP922
Type: Pneumatic Averaging / Ratio Relay
Dimensions, Approximate: 2 7/16 in. wide x 1 5/8 in. deep x 2 7/8 in.
high (62 mm wide x 42 mm deep x 73 mm high)
Airflow Usage: Average of two input pressures
Air Connections: Barb fittings 5/32 in. (4 mm) O.D. plastic tubing
Operation: Can sum two input pressures, average two input pressures,
be adjustable flow restriction or be an adjustable pressure supply.
Mounting: Wall or panel or Snap onto DIN rail
Operating Humidity Range (% RH): 5 to 95% RH
Maximum Safe Operating Pressure: 30 psi (205 kPa)
1
2
3
FLOW SIGNAL 2
FLOW SIGNAL 1
TOTAL CFM
FLOW SIGNAL
C4289
Product Number Operation Mounting Description
RP922A1007 Can sum two input pressures, average two input pressures, be
adjustable flow restriction or be an adjustable pressure supply.
Wall or panel or Snap
onto DIN rail
Wall, Snap onto DIN rail or panel mounted
Pneumatic Averaging / Ratio Relay
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