Thermostatic expansion valve
A thermostatic expansion valve (TXV), also called a thermal expansion valve, is a device used in HVAC systems to regulate the amount of refrigerant that enters the evaporator coil. It adjusts the flow of refrigerant based on the superheat—a measure of how much the refrigerant gas has been heated above its boiling point. By doing this, it ensures the evaporator operates efficiently, preventing too much or too little refrigerant from flowing in. This helps maintain consistent system performance and protects the compressor from damage caused by liquid refrigerant.
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