The thermostatic expansion valve (TEV or TXV) is erroneously considered by some to be a mysterious and complex device. As a result, many valves are needlessly replaced when the cause of the system ...

and controls the freon flow through the system (and the pressure difference between the two sides). The inlet side of the valve is at high pressure and the freon is a room temperature liquid at this ...

The basic components and function of a thermostatic expansion valve (TXV) continues to play a role in HVAC service. “Long, long ago in a faraway place, TXVs had very little impact on service ...