What Is a Thermostatic Expansion Valve?
In the simplest terms, a thermostatic expansion valve is responsible for controlling the amount of refrigerant that is put into the HVAC system’s evaporator. Without an expansion valve, the refrigerant would not be able to properly change states from a liquid to a gas, which is how a system produces cold air. Let’s take a look at how the thermostatic expansion valve works. The Purpose of a Thermostatic Expansion Valve To understand how the thermostatic expansion valve works, it’s important to know the basics of how a cooling system works. There are four main components to
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