So, You Think You Know Shuttle Valves? | Power & Motion
https://www.powermotiontech.com/hydraulics/hydraulic-valves/article/21885327/so-you-think-you-know-shuttle-valves
WebNov 2, 2016 · The shuttle valve is essentially an OR logic element (see above). One input or the other becomes the output, usually a pilot signal that controls a normally open or normally closed valve. The circuit shown is an OR circuit, with the OR elements (shuttle valves) connected to a normally closed valve.
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