Pneumatic valve neutral point
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I’m new to valves and would like to know how to determine whether a pneumatic valve is in the neutral position without moving it
Neutral point location? I don’t quite understand what you mean. Typically, pneumatic on-off valves are equipped with limit switches, and the position of the valve – whether it is open or closed – can be determined from the markings on the indicator cap of the limit switch.
How to determine whether a pneumatic control valve is at the neutral position when it is at a certain degree of opening
Pneumatic on-off valves and pneumatic control valves are different; generally, pneumatic control valves are equipped with electrical positioners (mechanical or intelligent) that receive a 4–20 MA current signal to provide feedback on the valve’s open or closed position.