Biasing pneumatic relay Model 22

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Product overview
The Model 22 pneumatic computing relay is a control valve designed to perform averaging, differential, inverting and totalizing functions. It accepts up to four pneumatic inputs and provides positive and negative biasing adjustable across a broad range. The unit is offered in multiple configurations to suit diverse process-control applications.

Key features

• Up to four inputs for multi-element or override control
• Operates as modulating control or as ON-OFF valve with rapid full open/full closed action
• Small bleed across relief seat ensures fast response to small signals
• Adjustable bias range from -18 to +15 psig
• Two gauge ports located 90° from supply and outlet for installation flexibility
• Line or panel mounting for straightforward field installation

Technical specifications

• Functions: averaging, differential, inverting, totalizing
• Inputs: up to four pneumatic inputs
• Biasing: adjustable positive and negative bias; range -18 to +15 psig
• Operation modes: modulating control or rapid ON-OFF operation via feedback loop
• Bleed: small bleed across relief seat for fast response
• Ports: two gauge ports at 90° from supply and outlet
• Mounting: line or panel mounting
• Availability: multiple configurations to meet application requirements