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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.
-13%Daikin-McQuay 106489102 1/2X1/2 R410A 1.5Ton Thermal Expansion Valve(Txv) ;30 Inch CpSpecial Price $88.00 Regular Price $101.21Out of stock
-10%Sporlan Controls 108123 3/8 Inch X1/2 Inch Odf R134A 30 Inch Ext Thermal Expansion Valve(Txv)Special Price $289.49 Regular Price $321.34Out of stock
-13%Sporlan Controls 109212 Thermal Expansion Valve(TXV) W/30" Capillary 1/4TonSpecial Price $177.60 Regular Price $204.24Out of stock
-13%Sporlan Controls 109221 1/4X1/2 R-22 1/2Ton Thermal Expansion Valve(Txv) ,30 Inch CapSpecial Price $177.60 Regular Price $204.24Out of stock
-13%Sporlan Controls 109263 1/4X1/2 R-22 1Ton Thermal Expansion Valve(Txv) ; 30 Inch CapSpecial Price $195.37 Regular Price $224.68Out of stock- -10%Sporlan Controls 111851 1/4 Inch X3/8 Inch Odf Efs-1-C Thermal Expansion Valve(Txv) ValveSpecial Price $215.50 Regular Price $239.21Out of stock
- -10%Sporlan Controls 120430 1 1/8X1 1/8 R-Rr 42T Thermal Expansion Valve(Txv) 10'CapSpecial Price $1,530.30 Regular Price $1,698.63Out of stock
- -10%Sporlan Controls 120661 1 1/8X1 1/8 R-22 42T Thermal Expansion Valve(Txv) ;5'CapSpecial Price $1,530.30 Regular Price $1,698.63Out of stock
- -10%Sporlan Controls 125426 1 1/8X1 3/8Odf 410A Thermal Expansion Valve(Txv)Special Price $993.90 Regular Price $1,103.23
- -10%Sporlan Controls 129760 1/2X7/8 R-22 5Ton Thermal Expansion Valve(Txv) ; 4X7 OdfSpecial Price $391.43 Regular Price $434.49Out of stock
- -10%Sporlan Controls 129789 1/2X7/8 R-22 5Ton Thermal Expansion Valve(Txv) ; 5'CapSpecial Price $288.64 Regular Price $320.39Out 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.