Seeking advice on self-acting valves
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I want to know how this self-acting valve works; could some expert please explain it in detail?
The force exerted by the signal gas on the diaphragm is in balance with the spring force.
In the diagram, pipeline 1 is the air source for the self-acting valve. Figure 2 shows the exhaust and intake action when the valve diaphragm head moves. Figure 3 is the self-acting valve testing pipeline.
The principle is shown in the figure below; in the questions, pipelines 1, 2, and 3 correspond to the red markings in the figure； The physical product consists of two membrane tips assembled one on top of the other ； The physical design will vary depending on factors such as the shape of the valve core and seat, the installation position of the springs, and the pipeline pressure; this leads to changes in the location of the air inlet as well as the addition of accessories like pressure regulators. But the basic principle remains the same.
What the hell, is it useful? It doesn’t look reliable at all.