THERMOSTATIC EXPANSION VALVE

A thermostatic expansion valve (TXV) is a crucial device in a refrigeration system that decreases the pressure of the refrigerant liquid received from the condenser. It then injects and controls the mass flow of refrigerant entering the evaporator, adjusting this flow based on the temperature of the refrigerant at the evaporator's outlet.

How It Works: The TXV utilizes a sensing bulb to monitor the temperature and pressure of the refrigerant at the evaporator outlet, enabling it to adjust the refrigerant flow as needed.

These expansion valves are typically installed in the liquid line or discharge line, where they spray refrigerant into the evaporator. As the refrigerant experiences sudden changes in volume, both its pressure and temperature drop, causing it to transition from a liquid to a vapor state.

Thermostatic expansion valves play a vital role in regulating the flow of refrigerant into the evaporator by sensing the temperature of the evaporator outlet pipe. They are essential components in any refrigeration system, regardless of its type, operation, or application.

Recommended expansion valve manufacturers:

• Danfoss
• Emerson Technologies
• Sporlan