The Type 20 Air Relay is a compact, two-stage, pilot operated 1:1 relay with positive and negative bias adjustment capability. It accepts a signal pressure and, combined with a ±30 psi bias adjustment, maintains a resulting output pressure with an accuracy and reliability unmatched by any other pressure relay in its price range.

Applications include; Volume Boosting, Dancer Roll Loading, Calendar Roll Loading, Cylinder Bucking Control, Clutch and Brake Controls, Gas Flow Control, Tension Control, and Valve Motor Loading.

The Type 20 is also available in high relief and extra high relief models providing extra fast "blow-down" for applications requiring a very rapid release of output pressure.