Schneider Electric (Barber Colman) 2372-501 Pressure Selector

The Schneider Electric (Barber Colman) 2372-501 is a high-performance pneumodular pressure selector and volume booster relay engineered for critical pneumatic control sequences. Specifically designed as a low pressure selector, this unit compares two proportional input signals and transmits the lower value to the branch line. When utilized as a pneumatic volume booster relay, it significantly reduces system transmission lag by amplifying the volume of control air—an essential requirement when a single proportional controller is managing multiple diaphragm valves or damper actuators.

This proportional-action relay features a factory-integrated bias adjustment, allowing the branch output to be advanced or retarded by ± 5 psig from the true signal. Housed in a durable glass-filled nylon body, the replacement for Barber Colman 2375-501 is compatible with 22-120 manifold sockets or can be surface-mounted using the included plastic strap and adhesive base. For field installation, the unit provides barbed nipples designed for 1/4" O.D. or 5/32" I.D. tubing. Use only with clean, dry, oil-free control air to ensure long-term reliability in industrial HVACR environments. The 2372-501 serves as a direct professional-grade replacement for legacy models AK-50607 and AK-51642.

• Dual-Function Capability: Operates seamlessly as either a low signal selector or a 1:1 volume booster for high-capacity actuator sets.
• Precision Bias Tuning: Mechanical bias adjustment provides ± 5 psig offset to compensate for line loss or specific sequence requirements.
• Enhanced System Response: Minimizes signal delay in large-scale pneumatic loops by boosting air volume to final control devices.
• Universal Compatibility: Direct drop-in replacement for Barber Colman 2375-501, 161W43, and earlier AK-series pneumatic relays.
• Flexible Installation: Compact design supports manifold-socket mounting or stand-alone surface mounting for restricted-space applications.

Is the 2372-501 compatible with non-Schneider manifold systems?
While designed for the Pneumodular 22-120 manifold socket, it can be surface-mounted using the 22-150 bracket or the included mounting strap for compatibility with various pneumatic control panels.

How do I configure the 2372-501 as a Volume Booster versus a Low Pressure Selector?
To function as a booster, the main air supply is piped to the "M" port. When used as a low selector, two signal inputs are fed to the ports, and the relay mechanically selects the lower pressure signal for the branch output.

What are the air consumption requirements when used as a volume booster?
The unit features an air capacity of 8 SCFH and consumes 29 SCIM (Standard Cubic Inches per Minute) when operating in volume booster mode at a nominal 20 psig main air pressure.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.