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, , (1750 kPa)     Flow Capacity: 40 SCFM (68 m3/HR) @ 100 psig, , (700 kPa) supply, 20 psig, , (150 kPa) setpoint     Exhaust Capacity:11 SCFM (18.7 m3 /HR) where downstream pressure is 5 psig, , (35 kPa) above setpoint     Signal or Output Pressure: 150 psig, , (1000 kPa) maximum     Supply Pressure Effect: Less than 0.1 psig, , (.7 kPa) for 100 psig, , (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