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FAIRCHILD MODEL 21 - ADJUSTABLE RATIO RELAY Model Number: 21

Flow capacity 40 SCFM @ 100 psi supply, 20 psi set point. Sensitivity 0.5' Water Column. Supply pressure 250 psi maximum, Out let pressure 150 psi maximum. Ratio range 30:1 through 1:30. Pipe size 1/4' NPT - 3/8' NPT/BSPT.

FAIRCHILD MODEL 22 - COMPUTING RELAY Model Number: 22

Adjustable bias over range -18 to + 15 psig. Input and output pressure range 3-15 psig. Maximum operating pressure: Signal and output 50 psig Supply 150 psig. Pipe size 1/4' NPT - 3/8' NPT.

FAIRCHILD MODEL 24 - SNAP ACTING RELAY Model Number: 24

Maximum supply pressure 120 psig. Signal range 2' Water Column to 120 psig. Repeatability 0.2' Water Column. Adjustment range 2' W.C.-10 to 2.0-120. Inlet and Outlet 1/4' 3/8'.

FAIRCHILD MODEL 25 - REVERSING RELAY Model Number: 25

Flow capacity 40 SCFM @ 100 psi supply, 20 psi set. Sensitivity 1/8' Water Column. Supply Pressure 250 psi maximum. Output pressure 150 psi maximum. Adjustment range 0-10 psig to 2-150 psig. Pipe size 1/4' NPT - 1/2' NPT/BSPT.

FAIRCHILD MODEL 90/91 - HI & LOW SELECTOR RELAY Model Number: 90/91

Maximum signal pressure 200 psig. Minimum switching differential less than .1 psig. Maximum differential between signals 100 psig. Port size 1/4' NPT/BSPT.

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