Kenosha Reuse Discussion Board > KENOSHA, WI
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> Fairchild model 21 adjustable ratio relay 21213 e t
Fairchild model 21 adjustable ratio relay 21213 e t
Fairchild Model 21 Adjustable Ratio Relay
Model 21 Adjustable Ratio Relay
Ratio Range: 30:1 through 1:30
Options: Tamper Proof Cap, Tapped Exhausts
Diaphragms: Buna N and Dacron,
Trim: 316 SS, Brass, Cad. Plated Steel,
Lever and Fulcrum: Hardened steel
The Model 21 consists of a signal chamber lever arm, a Model 20 output valve body, and pivot assembly for lever arm adjustment. The ratio of output pressure to signal pressure is infinitely adjustable. The adjustment range permits signal amplification of 1:30 or signal reduction of 30:1 by rotation of the ratio adjustment knob.
