Schneider Electric (Barber Colman) 22-138 Gauge Adaptor

The Schneider Electric 22-138 Gauge Adaptor is a critical fitting designed for precise pneumatic system diagnostics and calibration. This Barber Colman gauge adapter features 1/8" -27 FPT threads, allowing for the seamless integration of standard pressure gauges into existing control loops. Specifically engineered to interface with the 22-137 check valve and 22-143 check valve tee, this adapter ensures a leak-free connection for accurate pressure readings. Beyond basic valve testing, it is fully compatible with the Schneider Electric 2x2 room thermostat line, as well as various humidistats and transmitters. For field technicians, this adapter is a staple for HVAC pneumatic calibration, facilitating the monitoring of branch and main line pressures without disrupting system operation. Its robust construction and precise threading make it the standard choice for maintaining legacy Barber Colman and modern Schneider Electric pneumatic control systems.

• Universal Compatibility: Fits all standard 2x2" room thermostats and transmitters for versatile field use.
• Precise Threading: Features a high-tolerance 1/8" -27 FPT connection to prevent air loss during testing.
• System Integration: Optimized for use with 22-137 and 22-143 pneumatic check valves.
• Durable Construction: Built to withstand the rigors of commercial mechanical rooms and frequent tool-on-tool attachment.

How do I ensure a leak-proof seal when installing this adapter on a 22-137 check valve?
Ensure the threads are clean and free of debris. Hand-tighten the adapter into the check valve before using a wrench for a final quarter-turn to seat the internal gasket. Avoid over-torquing to prevent damage to the fitting threads.

Can this adapter be used to verify calibration on Schneider 2x2 transmitters?
Yes, this adapter is specifically designed to plug into the test ports of 2x2 pneumatic transmitters, allowing a technician to verify the output signal against a calibrated test gauge.

What is the thread pitch for the female port?
The internal port is tapped for 1/8" -27 NPT (FPT), which is the standard size for the majority of pneumatic test gauges used in HVACR applications.

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.