What is the principle of self-operated pressure regulating valve? How does it work?

When the pressure before and after the valve is introduced into both sides of the air chamber of the actuator at the same time, the self-operated differential pressure regulating valve can adjust the pressure at both ends of the regulating valve to be constant, or introduce the differential pressure at both ends of the orifice plate installed on the pipeline into both sides of the air chamber of the membrane actuator to form a self-operated flow regulating valve, or realize the flow regulation after detecting the flow by using the self-operated differential pressure regulating valve in other ways.

Operation when steam is used: Tighten the pour outlet screw from the condenser; Loosen the exhaust plug of the actuator; ; Add it through the liquid injection port with a liquid discharge head until the exhaust hole flows out; Tighten the exhaust plug and continue to inject water until it overflows the liquid injection port; Tighten the screw of the liquid injection port; Slowly open the stop valves before and after the regulating valve; Adjust the pressure regulating disc and observe whether the indicated pressure value meets the requirements.

Extended data

Main features:

1. Self-operated pressure regulating valve does not need additional energy, and can work in places without electricity and gas, which is convenient and energy-saving.

2. The pressure segmentation range is fine and cross each other, and the adjustment accuracy is high.

3. The pressure set point can be set continuously during operation.

4. For post-valve pressure adjustment, the ratio of pre-valve pressure to post-valve pressure is 10: 1~ 10:8.

5, rubber diaphragm detection, actuator detection accuracy is high, sensitive action.

6. Adopt pressure balance mechanism to make the control valve sensitive and accurate.

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