What Is a Thermostatic Expansion Valve?
The thermal expansion valve, also known as TXV or TEV, is a common feature in most refrigeration or air conditioning systems, and it’s usually located just before the evaporator. The thermal static expansion valves work with precision to control the refrigerant’s flow rate into the evaporator chamber, which is essential in improving the efficiency of the evaporator while at the same time holding back the excellent liquid refrigerant from flooding back to the compressor section. TXV has a design feature that allows it to create and maintain a separation between the high- and low-pressure sides of an air conditioning system. Usually, liquid refrigerant is at high pressure as it enters the TXV valve via the fluid line. Its pressure is significantly reduced by the TXV when it regulates the amount of refrigerant flowing into the evaporator. Main Components of the TXV The valve body The pin The sensing Bulb The spring The diaphragm The Working Principle of the TXV The thermostatic expansion valve is designed to precisely hold the liquid refrigerant under high pressure from entering the compressor and control the evaporator’s amount. The TXV reduces the pressure of the refrigerant, allowing it to boil at lower temperatures. Boiling is...
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