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Lennox 51W27 Thermal Expansion Valve(Txv) Valve

Special Price $261.77 Regular Price $290.56
Out of stock
The Lennox 51W27 Thermal Expansion Valve (Txv) Valve is a crucial component in HVAC systems that regulates the refrigerant flow rate within the evaporator coil. Imagine it as a smart faucet that controls the flow of refrigerant based on temperature. It's made of brass for durability and features a sensing bulb filled with refrigerant. This bulb acts like a temperature sensor. As the evaporator coil temperature decreases, the pressure in the sensing bulb also decreases. This decrease in pressure signals the valve to open wider, allowing more refrigerant to flow into the evaporator coil to absorb heat from the surrounding air. Conversely, as the evaporator 1coil temperature increases, the pressure in the sensing bulb increases, causing the valve to close slightly, restricting refrigerant flow. This precise control of refrigerant flow optimizes cooling performance and system efficiency by ensuring the evaporator coil doesn't over-freeze and by preventing unnecessary use of refrigerant.


  • Measure: Unit
  • Weight: 2.1lbs
  • Material: Brass
Manufacturer Name: Lennox
Product Number: 51W27
OEM Part Number: 51W27
Product Description: Txv Valve

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