Expansion Valve ERFW is a thermal expansion valve that is used to control the flow of refrigerant in refrigeration systems. This valve senses the temperature change at the evaporator outlet through the temperature sensing package and automatically adjusts the valve opening to maintain the superheat at the evaporator outlet within the set range. Here are some features and applications of the ERFW expansion valve:
Automatic adjustment: The change in the superheat of the refrigerant at the evaporator outlet is used to adjust the valve opening to control the refrigerant flow into the evaporator. It mainly consists of valve body, valve needle, diaphragm, spring, temperature sensing package and pressure equalizing tube.
Control accuracy: The control accuracy of the thermal expansion valve depends on the sensitivity of the temperature-sensing package and the adjustment characteristics of the valve. However, due to the thermal inertia of the temperature-sensing package and the mechanical response characteristics of the valve, the control of the superheat by the thermal expansion valve has certain fluctuations and lags.
Adjustment range: The adjustment range of the thermal expansion valve is relatively narrow, usually between 1.5 and 3 times the rated flow.
Reaction speed: The thermal expansion valve relies on the temperature-sensing package to sense the change in superheat, and there is a certain thermal inertia and transmission delay. At the same time, the mechanical adjustment characteristics of the valve also limit its response speed.
Application: ERFW expansion valve is suitable for various refrigeration systems, such as commercial air conditioners, chillers, cold storage rooms, freezers, etc.
Maintenance: The design takes into account the convenience of maintenance, which is convenient for regular inspection and necessary adjustments.