First Company 9EVR410-2 Universal Thermal Expansion Valve (TXV) Kit is a refrigerant flow-control component designed for compatible R410A air conditioning and heat pump systems rated from 42,000 to 60,000 BTU. It regulates refrigerant entering the evaporator coil according to system load and superheat conditions, supporting proper heat transfer and efficient operation. Used with compa... https://www.partshnc.com/first-company-9evr410-2-unv-txv-kit-42-60-r410