Lennox 29M89 Thermal Expansion Valve(Txv) Valve

The Lennox 29M89 Thermal Expansion Valve (TXV) is an essential component of reciprocating air conditioning systems that controls the amount of refrigerant refrigerant flow in the evaporator. Constructed of brass for longevity, the TXV is a temperature sensitive valve. It is named so because it operates based on the temperature of the refrigerant that leaves the evaporator coil. When the temperature increases, the TXV opens up more to let more refrigerant pass through the coil, and take more heat from the surrounding air. TXVs control the flow of refrigerant and thus help in saving energy as well as maintaining comfortable conditions inside the building.