Lock-up Valve Principle


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Lock-up Valve Principle

As this valve is the role of locking to prevent the air venting from positioner if the air pressure goes down below the setting pressure in case of air failure, the function is to convert and lock, isolate the control valve immediately when the air pressure goes down below the setting pressure. It can have the valve operate normally when the air line returns to normal state from the valve stay-put at the final signal.

Author - Stanley Park


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