The Trane VAL19487 Thermal Expansion Valve is a refrigerant metering device designed for compatible Trane air conditioners, heat pumps, and other HVAC systems. It automatically regulates the flow of refrigerant into the evaporator coil based on system demand, maintaining proper superheat for efficient heat transfer. This precise control improves cooling and heating performance, enhanc... https://www.partshnc.com/val19487-trane-38-x12-odf-r410a-txv-40-cap