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The principle of self-operated thermostatic valve

Temperature control valve is abbreviated as temperature control valve. It is a typical application of flow control valve in the field of temperature control. The principle is to control the device by controlling the heat exchanger, air conditioning unit or other heat, cold equipment, and a hot (cold) media inlet flow. output temperature. When the load changes, adjust the flow by changing the valve opening to eliminate the effect of load fluctuations and return the temperature to the set point.
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Thermostatic valves can be divided into: self-operated thermostatic valves and electric thermostatic valves.

Self-regulating temperature control valve uses the principle of liquid thermal expansion and liquid incompression to achieve automatic adjustment. The expansion of the liquid within the temperature sensor is uniform and its control is proportional. As the temperature of the controlled medium changes, the volume of temperature-sensing liquid within the sensor expands or contracts. When the temperature of the controlled medium is higher than the set value, the temperature-sensitive liquid expands and pushes the valve core downward to close the valve to reduce the flow of the heat medium; when the temperature of the controlled medium is lower than the set value, the temperature-sensitive liquid shrinks, and the return spring pushes The spool opens to increase the flow of the heat medium.

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