The working principle of self-reliance type temperature control pneumatic valve

self-reliance type pneumatic control valve does not need external energy and automatic temperature adjustment, suitable for steam, hot water, hot oil as medium of heat transfer.
self-reliance type pneumatic control valve is widely used in heating, air conditioning, hot water temperature automatic adjustment, automatic temperature adjustment and special occasions.
on the working principle of pneumatic control valve:
self-reliance type pneumatic control valve by using the principle of liquid heat expansion and incompressible implement automatic adjustment. Fluid expansion in the temperature sensor is uniform and its control effect is proportional control, is accused of medium temperature changes, the volume of thermal fluid inside the sensor as the expansion and contraction.
is accused of medium temperature is higher than the set value, the thermal fluid expansion, promote shut down pneumatic valve, pneumatic valve core to reduce the flow of heat medium; Accused of medium temperature is lower than the set value, the thermal liquid contraction, reset spring push pneumatic valve core to open, to increase the flow of heating medium.