Cold Expansion Ball Valve Working Principle

By sensing the superheat of the gaseous refrigerant at the evaporator's outlet, the thermal expansion ball valve with locking arrangement controls the flow of refrigerant into the evaporator. Ball valve with pressure relief is classified as external balance or internal balance based on their balance methods. Externally compressed air ball expansion valves are commonly found in industrial cooling equipment. The thermal expansion valve is made up of a sensing mechanism, an implementing mechanism, an adjusting mechanism, and a valve body. The induction mechanism is filled with a freon working medium, and the temperature sensing bulb is installed at the evaporator's outlet. The temperature difference between the outlet temperature and the evaporation temperature is referred to as superheating. When the temperature sensing bulb detects the evaporator's outlet temperature, the entire sensing system is at the corresponding saturation pressure Pb. The force will be transmitted to the valve core via the ejector rod via the diaphragm.