The Trane VAL11520 3 Ton Expansion Valve is a precision HVAC component designed to regulate refrigerant flow into the evaporator coil for efficient cooling performance. Featuring a 0.375-inch ODF inlet, this expansion valve controls refrigerant delivery based on system operating conditions, helping maintain proper evaporator pressure and temperature. It is used in compatible Trane air... https://www.partshnc.com/trane-val11520-3-ton-expansion-valve-0-375-odf-inlet