The Rheem-Ruud 61-102211-39 4-Ton Thermal Expansion Valve is a refrigerant metering device designed for compatible 4-ton air conditioners and heat pump HVAC systems. It automatically regulates refrigerant flow into the evaporator coil based on system demand, maintaining proper superheat for efficient heat transfer. This precise control improves cooling performance, enhances energy eff... https://www.partshnc.com/txv-valve-r410a-4ton-38x38