Bellofram Type 20HR High Relief Air Relay

Marsh Bellofram’s Type 20HR Precision Pneumatic Air Relay is a compact, two-stage, pilot controlled 1:1 air relay with positive and negative bias adjustment aptitudes. It accepts a signal pressure and, when combined with bias adjustment, maintains a resultant output pressure with an accuracy and reliability unparalleled by any other industry air pressure relays in its price range.

The Type 20HR delivers fast “blowdown” for very quick release of output pressure. The extra relief feature makes this relay ideal for cylinder return stroke actuation, air hoists, and similar applications requiring fast exhaust. The robust and stable construction further includes both positive and negative bias capability.  Type 20 pneumatic relays are the ideal choice for control valves, gate actuators, disc and shoe brakes, remote positioning devices, air hoists ,valve rotors, tensioning systems and web tracking systems.