Txv Power Head; 5 Capillary For Daikin-Mcquay Part# 31780500

The Thermostatic Expansion Valve Power Head, 5' Capillary for 31780500 is an essential component in some Daikin-Mcquay HVAC systems. This valve is essential for controlling the system's refrigerant flow. Refrigerant exiting the evaporator coil is measured for temperature using a 5-foot capillary tube. Based on this temperature, the thermostatic expansion valve regulates the quantity of refrigerant that enters the evaporator. The valve widens in response to an excessively high temperature, facilitating the passage of additional refrigerant and improving heat absorption. On the other hand, the valve limits the flow when the temperature drops too low, preventing the evaporator from overcooling and perhaps freezing.