Lennox 13Y20 Thermal Expansion Valve(TXV) Valve Outdoor 4 Ton R410

The Lennox 13Y20 Thermal Expansion Valve (TXV) is a required accessory for 4-ton outdoor HVAC units which use R410a refrigerant. This compact valve plays a essential function of controlling the flow of refrigerant within the system. By precisely controlling the amount of refrigerant entering the evaporator coil Cooling performance and efficiency is maintained by the 13Y20 which comes with a size of 1/2 Inch and an outlet size of 3/8 Inch. They ensure a constant system pressure and thus avoid flooding the evaporator coil which can result in limited cooling ability, and system damage.