How is the operating pressure of control instruments and pneumatic valves determined?
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How to determine the operating pressure when selecting a pneumatic valve? What kind of pressure does this refer to? Should the air supply pressure be increased? When selecting a flow meter, how should its operating pressure be increased? How to know their work stress?
Well, I’ve also considered this issue; for example, the medium pressure is 30 MPa, while compressed air has only 0.6 MPa – I’m afraid the valve simply won’t be able to close
Do you understand the principle of leverage? Archimedes said, Give me a lever long enough and a fulcrum on which to place it, and I can lift the Earth!
But if the lever isn’t long enough, it’s still Earth that lifts Archimedes
The pressure of the medium flowing through the valve is independent of the pressure supplying air to the valve.
When selecting a pneumatic valve, the manufacturer will ask for the pressure of the purified air network in your plant. The air supply pressure required by the valve actuator will definitely be lower than the pressure in your purified air network.