Brief self-pressure regulating valve production principle

Self-regulating valve for regulating the field of industrial automation process control media flow, led waterproof Switching Power Supply, temperature, level and other process parameters. According to the automated system control signal, automatically adjust the valve opening, in order to achieve medium flow, pressure, temperature and level of regulation. The following terms of how it is done on the principle:
one, self-operated led perimeter displays control valve works (heating type)
temperature control valve is based on the incompressible liquid cooling and thermal expansion contraction principle work. Self-heating temperature control valve, when the controlled object temperature below the set temperature, the temperature of liquid package contraction, the role of putting in force on the actuator decreases, spool GMC car dvd gps under the action of the spring force so that the valve open, steam and hot oil to increase the flow of heating medium, the controlled object temperature rises, until the temperature of the controlled object to a set value, the valve is closed, the valve closed, the controlled object temperature decreases, the valve has opened, the heating medium and into the heat  pet-bag, and the temperature rose, so that the controlled object temperature is constant. Valve opening size and the controlled object and the actual temperature difference between the set temperature.
Second, the self-operated temperature control valve works (cooled)
Self-cooling temperature control valve works can refer to self-heating temperature control valve, only when the spool is components in the actuator and the spring force to open and close off the valve and the temperature contrast, the valve body through the cold medium, mainly used in cooling the temperature control.
Third, self-operated flow control valve works
charged media type valve, the valve before the pressure P1 input through the control line under the membrane chamber, after cutting through the throttle input on the film chamber pressure Ps, P1 and Ps is the difference △ Ps = P1-Ps as effective pressure. P1 acting on the diaphragm to generate the thrust acting on the diaphragm and Ps thrust generated on the poor and the spring reaction force balance to determine the relative position of the spool and the valve seat in order to determine the flow through the valve. When the flow through the valve increases, that is △ Ps increases, the renault megane car gps dvd of P1, Ps, respectively, the next role, the film room, the spool moves to the seat, thus changing the flow between the valve and valve seat area, so Ps increases, the increased role of Ps with the  cool schoolbags on the diaphragm spring reaction force acting on the diaphragm and P1 on the thrust in the new position to balance to control the flow purposes. On the contrary, empathy.