Emerson Flow Control (Alco) 066663 4-Ton Thermal Expansion Valve(TXV) W/Connect R410A

The Emerson Flow Control (Alco) 066663 Thermal Expansion Valve is an essential part of the HVAC systems that use R410A refrigeration fluid and has a 4-ton capacity. This TXV controls the amount of refrigerant that enters into the evaporator to achieve the right level of superheat. It works through measuring the temperature of the low side refrigerant vapor after passing through the evaporator, using a bulb containing thermodynamic fluid, regulating the valve size in proportion with the cooling requirements. This dynamic adjustment helps the system to perform optimally, protects the compressor from damage due to liquid refrigerant and also increases energy utilization.