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this replacement expansion valve power head ensures seamless HVACR valve maintenance by allowing the power element to be swapped without removing the entire valve body from the line
Rugged construction built for demanding industrial and commercial HVAC environments
The units are functionally identical
it minimizes pitting and arcing
Schneider Electric (Barber Colman) 2378-501 Relay 30067439-890 this replacement expansion valve powerThe Schneider Electric (Barber Colman) 2378 501 Relay is a high performance pneumatic amplifying relay designed for proportional signal control in HVAC systems. Engineered as a Pneumodular component, this device provides a definitive 2: 1 amplifying function, doubling the input signal pressure to the branch line. This is essential for contractors managing larger actuators or terminal units that require higher pressure than the standard controller
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