Single-acting pneumatic, air-shut off
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I would like to ask about the current situation: In the picture, it is a single-acting normally closed butterfly valve. When the solenoid valve is powered, air can pass through the port without a silencer, and the valve opens; once the air supply is cut off and the solenoid valve loses power, exhaust occurs and the valve closes. But currently, when this problem occurs and the gas supply is turned off, the customer’s solenoid valve remains powered and does not switch to a de-energized state; as a result, it takes a long time for the valve to close (it has to wait until the air in the pipeline has been discharged first). I was wondering if there is any way to ensure that the valve closes as soon as the air supply is cut off, regardless of whether the solenoid valve is powered or not. Thank you
Yes, a pneumatic relay can be installed. As soon as the main air pressure drops, the relay discharges the air cylinder—the valve closes.
This post was last edited by Le Tian (Sen Yu) Automatic Control Valves on 2020-9-23 at 14:14. s