Schneider Electric (Barber Colman) AL-161-4 Switching Valve

The Schneider Electric (Barber Colman) AL-161-4 Switching Valve is a robust 3-way pneumatic switching valve engineered for critical air distribution in dual-pressure HVAC systems. This unitary valve is designed to facilitate seamless central supply air changeover, operating reliably within an 8-13 psi pressure range. Featuring 1/2-inch FNPT body connections and a 1/8-inch FNPT actuator port, the AL-161-4 ensures high-capacity throughput—rated at 25,920 scim with a 15 psi supply and 1 psi drop. Its durable 3 lb construction includes a die-cast aluminum actuator and a replaceable neoprene diaphragm, making it a staple for high-demand building automation systems. Technicians should note that the AL-161-4 is functionally identical to the AL-161-0-4-1, offering a 1:1 replacement for vintage or current HVAC control valve configurations. This model is not position-sensitive, allowing for versatile mounting in control cabinets or directly to subpanels. For performance-minded contractors, maintaining precise pneumatic switching in complex air handling units (AHUs) start with reliable Schneider Electric automation components.

• Enhanced Compatibility: Fully interchangeable with the Schneider Electric AL-161-0-4-1 and older Barber Colman 0-4 series pneumatic relays.
• Precise Changeover: Calibrated for 8-13 psi, allowing for accurate dual-pressure system switching without signal drift.
• High Flow Capacity: Rated at 25,920 scim to handle central supply air distribution across extensive pneumatic loops.
• Field Repairable: Integrated with a replaceable neoprene diaphragm (PNV-102-1) for extended service life in HVAC automation.
• Flexible Installation: Compact design with a built-in mounting bracket that supports any mounting angle without affecting switching valve performance.

Is the AL-161-4 a direct replacement for the AL-161-0-4-1?
Yes, these two part numbers refer to the same 3-way air switching valve specifications. They are functionally and physically identical for all HVACR applications.

What is the maximum air pressure for the actuator?
The actuator is rated for a maximum air pressure of 30 psig (207 kPa). Exceeding this limit may damage the internal neoprene diaphragm.

Can this valve be mounted in any orientation?
The AL-161-4 is non-position sensitive. It can be mounted horizontally, vertically, or at an angle within a NEMA Type 1 enclosure or control subpanel.

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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.