Trane VAL8637 Thermal Expansion Valve 5/16" ODM X 1/2" ODF R410A

The Trane VAL8637 is a thermal expansion valve or TXV control for HVAC applications that use R410A refrigerant. This kind of valve is necessary to regulate the flow of refrigerant in the system. In other words, it is a temperature sensitive pressure regulating device. Heat is generated in the surrounding air by the absorption of heat by this cool refrigerant. The TXV enlarges in response to the temperature rise when the warmed refrigerant exits the evaporator coil and comes into contact with it. For effective functioning of the system and to avoid overloading the system with the refrigerant this flow is controlled.