Self regulating pneumatic valve is how to adjust the temperature and pressure

self-reliance type adjustment pneumatic valve 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 regulating pneumatic valve opening, so as to realize the medium flow rate, pressure, temperature and liquid level of the regulation.
a, self-reliance type temperature adjusting working principle of the pneumatic valve ( Heating type
temperature control pneumatic valve is according to the principle of heat bilges cold shrink and incompressible fluid. Heating self-reliance type temperature regulating pneumatic valve, 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, pneumatic valve core components under the action of spring force, make the pneumatic valve is 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 in the set value, pneumatic valve closed, the pneumatic valve is closed, the controlled temperature drop, pneumatic valve and open, the heating medium and into the heat exchanger, and the temperature rising, so make the temperature of the object as a constant value. The pneumatic valve opening size and the controlled object of the actual temperature and set temperature difference.
2, self-reliance type temperature adjusting working principle of the pneumatic valve ( Cooling type
cooling with self-reliance type temperature adjusting the working principle of the pneumatic valve can be reference to heating self-reliance type temperature regulating pneumatic valve, pneumatic valve only when core components in the actuators and the spring force under the action of opening and closing, in contrast to the warm close the pneumatic valve, pneumatic valve body through the cold medium, mainly used in cooling device of temperature control.
3, self-reliance type flow adjusting the working principle of the pneumatic valve
is accused of medium type pneumatic valve, pneumatic valve chamber film under pressure P input via the control line before, after the throttle pneumatic valve throttling pressure Ps membrane house on input, poor P and Ps delta Ps = P - namely Ps referred to as the effective pressure. P 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 determines the pneumatic valve core and the relative position of pneumatic valve seat, to determine the flow rate through the pneumatic valve. When flowing through the pneumatic valve flow rate increases, the delta Ps increase, the result of P and Ps respectively function next, the film room, make the air to the pneumatic valve core seat direction, thus changed the pneumatic valve core and pneumatic seat between the circulation area, increase the Ps, increase after Ps role on diaphragm thrust and P plus the spring force on the diaphragm thrust balance to achieve the purpose of flow control in a new location.