The Trane VAL19629 3-Ton Thermal Expansion Valve (TXV) is a precision refrigerant metering device designed for compatible HVAC and refrigeration systems. With 3/8-inch inlet and 1/2-inch outlet connections, it regulates the amount of refrigerant entering the evaporator based on system temperature and pressure conditions. The TXV is commonly used in compatible Trane air-conditioning un... https://www.partshnc.com/val19629-trane-3-ton-thermal-expansion-valve-txv-3-8-in-x-1-2-out