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Electrically operated pneumatic switches used to interlock an electrical system and a pneumatic control system. Replacement devices are available for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell devices.


  • Usable as a diverting relay, a selector relay, or a stop and bleed relay.
  • Mount and operate in any position.
  • Available with lead wires or junction box.
  • Line or low voltage models available.

Product Specifications

Electric / Pneumatic Relay
Airflow Usage
0.42 scfm (200 mL/s) at 20 psi (138 kPa) supply with 1 psi (7 kPa) pressure drop
Dimensions (in.)
2 7/8 in. high x 1 3/4 in. wide x 1 1/4 in. deep
Dimensions (mm)
73 mm high x 44 mm wide x 32 mm deep
Maximum Safe Operating Pressure (psi)
50 psi, maximum
Maximum Safe Operating Pressure (kPa)
340 kPa, maximum
Temperature Range (F)
0 F to 100 F
Temperature Range (C)
-18 C to +38 C
Panel mount
60 Hz
Approvals, Underwriters Laboratories Inc.
Listed: Guide Y10Z,Component Recognized File: MP1502, Vol. 11, Sec. 1
Electrical Connections
15 in. (380 mm) leads
Operating Humidity Range (% RH)
5 to 95% RH
24 Vac
Approvals, Canadian Underwriters Laboratories Inc.
Listed: File No. LR50900
Air connections
Barb fittings for 1/4 in. (6 mm) plastic tubing
0.075 Cv minimum
Energized: ports 1 and 3 connected, port 2 blocked,De-energized: ports 2 and 3 connected, port 1 blocked
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