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Thermal expansion valves (TXVs) are crucial components in HVAC and refrigeration systems that regulate refrigerant flow into the evaporator coil. By maintaining proper pressure and temperature, TXVs ensure efficient heat transfer, prevent compressor damage, and support consistent cooling performance.
-10%Daikin-McQuay 300047539 4-Ton Thermal Expansion Valve (TXV) 1/2" X 1/2"Special Price $255.13 Regular Price $283.20Out of stock
-13%ClimateMaster 33B0002N07 1/2 Inch X 1/2 Inch Thermal Expansion Valve(Txv)Special Price $131.98 Regular Price $151.78
-10%York S1-022-08919-700 8-Ton Thermal Expansion Valve(TXV) R-22 1/2" X 5/8" 30" CapillarySpecial Price $706.16 Regular Price $783.84Out of stock
-10%York S1-025-30209-700 5.5Ton Thermal Expansion Valve(Txv)1/2" X 5/8" Sweat 60"Capillary TubeSpecial Price $496.26 Regular Price $550.85Out of stock
-10%- -10%York 025-26964-000 Thermal Expansion Valve(Txv) 1-5/8" ODF SweatSpecial Price $816.17 Regular Price $905.95Out of stock
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- -10%York 025-27536-000 Thermal Expansion Valve 7/8" X 1-1/8"Special Price $299.71 Regular Price $332.67
- -13%York 025-32837-000 Powerhead Thermal Expansion ValveSpecial Price $193.83 Regular Price $222.90Out of stock
- -10%York 025-32902-000 Thermal Expansion Valve PowerheadSpecial Price $281.67 Regular Price $312.66Out of stock
Thermal Expansion Valves for HVAC Systems & Controls
Heat Pump and Thermal Expansion Valves for HVAC Systems
TXVs control the refrigerant flow into the evaporator based on temperature and load conditions, ensuring balanced cooling. They are widely used in air conditioner expansion valve applications to optimize energy efficiency and maintain proper evaporator performance. In heat pump systems, a reliable heat pump expansion valve ensures smooth operation and prevents overfeeding or starving the coil.
Key components of a TXV include the sensing bulb, valve body, diaphragm, needle or pin, and capillary tube. Issues such as fluctuating evaporator pressure, inconsistent cooling, or erratic refrigerant flow are common. A refrigeration expansion valve often requires inspection for blockages, proper refrigerant charge, and correct response to temperature changes.
In commercial and residential setups, the TXV valve HVAC is critical for maintaining efficiency and protecting compressors from damage. Diagnosing problems involves checking the sensing bulb, verifying refrigerant charge, inspecting for debris, and confirming the valve operates correctly.
At PartsHnC, we offer a wide selection of thermal expansion valves, including valves with equalizers, bi-directional TXVs, capillary tube valves, and 3-ton thermal expansion valves. Our inventory supports trusted brands such as Carrier, Trane, Emerson, and Lennox, ensuring reliability, accurate fit, and long-lasting operation.
FAQs
How do I replace a TXV in HVAC or refrigeration systems?
Turn off the system, recover refrigerant, remove the old TXV, install the new valve, reconnect lines, recharge refrigerant, and test system performance.
Why isn't my thermal expansion valve regulating the refrigerant properly?
It could be blocked, overfeeding, undercharged, or have a damaged sensing bulb. Inspect and replace faulty components.
Can I repair a malfunctioning TXV?
Minor blockages can sometimes be cleared, but most TXVs should be replaced if they are malfunctioning to ensure proper cooling and system protection.
How do I install a TXV in an air conditioner?
Recover refrigerant, remove the old valve, install the new TXV, reconnect lines, recharge refrigerant, and test the system.
Why is my heat pump TXV not working properly?
Check for blockages, incorrect refrigerant charge, or a damaged sensing bulb; repair or replace the valve to restore proper refrigerant flow.