Simple Pneumatic One Shot Circuit

The one shot circuit is used to shorten long signals which may still be actuating a valve when it is necessary to reset the same valve. The circuit output appears as soon as the limit valve is actuated. The output is shut off after a delay, determined by a needle valve and a reservoir pair. Duration of the delay is determined by adjusting restrictive needle valve opening which fills a delay reservoir. Sooner the reservoir fill the shorter will be delay.