Pneumatic calculation relay Model 22

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Overview
Pneumatic Computing Relay Model M22 provides multi-input pneumatic signal processing for industrial control. It supports averaging, differential, inverting and totalizing functions and can be configured to operate as a rapid ON‑OFF valve.

Key features

• Up to four pneumatic inputs for multi‑element control or override applications.
• Configurable ON‑OFF operation with feedback connection for rapid full‑open/full‑closed action.
• Small bleed across relief seat ensures fast response to low‑level signals.
• Adjustable positive and negative bias range from -18 to +15 psig.
• Two gauge ports located 90° from supply and outlet for flexible installation.
• Line or panel mounting options for straightforward field installation.

Functions

• Averaging
• Differential
• Inverting
• Totalizing
• ON‑OFF valve operation (rapid full open/full closed with feedback)

Technical specifications

• Model designation: Model M22 (Pneumatic Computing Relay)
• Inputs: Up to 4 pneumatic inputs
• Biasing: Positive and negative biasing available
• Adjustable bias range: -18 to +15 psig
• Response: Small bleed across relief seat for fast response
• Gauge ports: Two, positioned 90° from supply and outlet
• Mounting: Line or panel mounting
• Configurations: Multiple configurations to meet application requirements
• Special behavior: Can be driven to full open or full closed via feedback to the signal chamber