
Type 20 Precision Pneumatic Air Relay
The Type 20 Precision Pneumatic Air Relay from Bellofram PCD is a compact, two-stage, pilot operated 1:1 air relay with positive and negative bias adjustment capability.


Type 72 and Type 72HR Positive Bias Booster Pneumatic Air Relays
Type 72 and Type 72HR Positive Bias Booster Pneumatic Air Relays are positive bias booster pneumatic relays are used when high flow capacity is required.


Type 75 and Type 75HR Pneumatic Air Relays
The Marsh Bellofram Type 75 and Type 75HR Pneumatic Air Relays use signal pressure to accurately control output pressure over a wide range of flow and supply pressure variations.


Type 79 High Flow and Type 79HR Precision Air Relays
Type 79 High Flow and Type 79HR Precision Air Relays from Marsh Bellofram PCD Type 79 1:1 ratio high-flow precision pneumatic (air) relays are designed for applications where precise flow control is required.
