Armstrong Furnace H4TXV03 Thermal Expansion Valve (TXV) R-410A 1.851365

This TXV kit is designed for 4–5 ton HVAC systems, providing precise refrigerant flow control to support stable cooling performance. It helps improve system efficiency by regulating refrigerant delivery to the evaporator coil under varying load conditions. Built for durability, it includes installation components suitable for replacements, upgrades, or new system installations.