Self-reliance type pneumatic control valve is how to adjust?

Self-reliance type pneumatic control valve is a kind of widely used in pneumatic control valve, because of its self-sufficient, don't need pneumatic, electric, drive, so was deeply loved by people in the industry. So, what's self-reliance type pneumatic control valve adjustment? Along with the below small make up to look at. Self-reliance type pneumatic control valve is used to adjust in the field of industrial automation process control medium flow rate, pressure, temperature, liquid level, etc. The process parameters. According to the control signal of the automation system, the automatic pneumatic control valve opening, so as to realize the medium flow rate, pressure, temperature and liquid level of the regulation. A, self-reliance type temperature working principle of the pneumatic control valve, Heating type) Temperature of pneumatic control valve is according to the principle of heat bilges cold shrink and incompressible fluid. Heating self-reliance type pneumatic control valve, temperature when the temperature of the controlled object is lower than the set temperature, the temperature inside the package liquid contraction, the force effect on the actuator push rod is reduced, the valve core components under the action of spring force to make the valve opened, to increase the flow of steam and hot oil heating medium, the temperature rise of the object, and until the temperature of the object to the set value, the valve closed, valve is turned off, temperature drop of the object, and valve opening, the heating medium and into the heat exchanger, and the temperature rising, so make the temperature of the object as a constant value. The valve opening size and the controlled object of the actual temperature and set temperature difference. Second, self-reliance type temperature working principle of the pneumatic control valve, Cooling type) Cooling with self-reliance type temperature working principle of the pneumatic control valve can be reference to heating self-reliance type pneumatic control valve, temperature only when the valve core components in the actuators and the spring force under the action of opening and closing valves closed and temperature on the contrary, the body through the cold medium, mainly used in cooling device of temperature control. Three, self-reliance type flow working principle of the pneumatic control valve is accused of medium type valve, valve chamber film under pressure P1 input via the control line before and after the throttle valve throttle pressure Ps membrane house on input, P1 and Ps of delta Ps = P1 - namely Ps referred to as the effective pressure. P1 role in the effects of the thrust and Ps on the diaphragm on the diaphragm thrust produced by the poor and the spring force balance determine the relative position of the valve core and valve seat, flowing through the valve of the flow was established. When flowing through the valve of flow increase, the delta Ps increase, the results of P1, Ps, respectively, next, the film room, to make the valve core seat direction, which changes the circulation between valve core and valve seat area, increase the Ps, increase after Ps role on the diaphragm thrust and the spring force and P1 on the diaphragm thrust balance to achieve the purpose of flow control in a new location.