ensuring consistent control circuit performance

making it a reliable replacement air vent for Weil-McLain boilers

The circuit will close once the differential pressure rises above your setpoint

it requires a minimum differential pressure of approximately 0

The "3CH" designation indicates a Hood #3

Nordyne 664275R TXV 318518-761 ensuring consistent control circuit performanceThe Nordyne 664275R TXV is a critical N Series thermal expansion valve engineered specifically for 5 ton packaged units. Designed for R410A refrigerant, this OEM component provides precise metering to maintain the correct superheat across the evaporator coil, preventing liquid slugging and ensuring compressor longevity. As a direct Nordyne replacement part, it eliminates the compatibility issues often found with universal aftermarket valves,