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RP973

A three-port relay averages the signals from two thermostats to control a single device such as a heating coil valve for a multizone unit. Replacements available for Johnson, Powers, Robertshaw, Barber-Colman, and olderHoneywell models

Pneumatic Three-Port Averaging Relay.

RP973A1005/U

Output is the average of the two inputs. Pneumatic Three-Port Averaging Relay.