Pneuline Pneumatic Relays

Part # MFG Relay Type  
RPP100 Pneuline Diverting-Switching Call... Add to Order
RPP300 Pneuline Reversing Call... Add to Order
RPP400 Pneuline HI-Pressure Selector Call... Add to Order
RPP500 Pneuline Low-Pressure Selector Call... Add to Order
RPP630 Pneuline Adjustable Ratio 0.1 - 1.0: 1 Ratio Call... Add to Order
RPP650 Pneuline 2:1 Ratio Call... Add to Order
RPP700 Pneuline Booster-Repeater Ratio-1:1 Call... Add to Order
RPP800 Pneuline Averaging Call... Add to Order
RPP900 Pneuline Hi & Lo Pressure Selector Call... Add to Order

Low Pressure Selector

Low Pressure Selectors pass the lowest of two separate signals. A common use for these relays is to select the coldest of two zones to control a heating valve.

ORDER # Replaces
RPP500 Honeywell #RP970A
Johnson #C-5226
L&G Powers #243-0200
Robertshaw #2372-351
Barber-Colman #AK-51642

Hi Pressure Selector

A High Pressure Selector will pass the highest of two different pressure signals. It is often used to select the hottest of two thermostat signals to control a cooling valve.

ORDER # Replaces
RPP400 Honeywell #RP470A
Johnson #C-5226
L&G Powers #243-0020
Robertshaw #2372-351
Barber-Colman #AK-50301

Diverting Relay (Switching)

A Diverting Relay (or Switching Relay) acts similarly to an electric SPDT relay, but it is switched (energized) by a pneumatic signal. Adjustable set point 3-23#psi, 5psi differential

ORDER # Replaces
RPP100 Honeywell #RP670A
Johnson #V-6133
L&G Powers #243-0001
Robertshaw #2353-503
Barber-Colman #AK-50301

Reversing Relay

A Reversing Relay reverses the action of the signal coming into the relay. For example, a direct acting signal is converted into a reverse acting signal. As the input signal increases in pressure, the output is lowered.

ORDER # Replaces
RPP300 Honeywell #RP972A
Johnson #R-3030
Robertshaw #2360-501
Barber-Colman #AK-40613

Ratio Relay

A Ratio Relay is a relay that increases the output at a preset ratio to the change at the input. The adjustable ratio relay is used to slow down the rate of change. The other relay is used for speeding up the rate of pressure change at a fixed ratio.

ORDER # Replaces
RPP650 2:1 Ratio Honeywell #RP971A
Johnson #C-202-1
Robertshaw #238-501
Barber-Colman #AK-50703
RPP630 Adjustable Ratio 0.1 - 1.0: 1 Ratio

Booster Relay or (Amplifying Relay)

Booster Relays (or Amplifying Relays) increase the volume or capacity of a pressure signal without increasing the pressure. They are used to refresh a low volume signal or a signal being sent over a long distance.

ORDER # Replaces
RPP700 Honeywell #RP970A
Johnson #R-2080
Robertshaw #2372-501
Barber-Colman #AK-40603