FAIRCHILD 25422 Model 25 Reversing Relay

 The Model 25 Reversing Relay provides an output which will decrease in direct proportion to an increase in input pressure.

Features

• High strength, deep convolution compensating diaphragm .

• Bottom pressure balancing chamber with a diaphragm .

• Floating seal ring .

• Balances undesirable relief seat forces.

• Ensures balanced supply seat forces.

• Protects stabilizing chamber from effect of high relief flows.

Specifications

Maximum Supply Pressure: 250 psig, [17.5 BAR], (1750 kPa)

Flow Capacity: 40 SCFM (68 m3/HR) @ 100 psig, [7.0 BAR], (700 kPa) supply, 20 psig, [1.5 BAR], (150 kPa) setpoint

Exhaust Capacity:11 SCFM (18.7 m3 /HR) where downstream pressure is 5 psig, [.35 BAR], (35 kPa) above setpoint

Signal or Output Pressure: 150 psig, [10 BAR], (1000 kPa) maximum

Supply Pressure Effect: Less than 0.1 psig, [.007 BAR], (.7 kPa) for 100 psig, [7.0 BAR], (700 kPa) change in supply pressure

Sensitivity: Less than 1/8” (.32 cm) Water Column

Mounting: Pipe or Panel

Ambient Temperature Limits -40° F to +200° F, (-40°C to 93.3° C)

Materials of Construction

Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Aluminum

Trim . . . . . . . . . . . . . . . .Aluminum, Stainless Steel, Brass

Diaphragms . . . . . . . . . . . . . . . . . . . . .Buna N and Dacron