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Unread 10-02-2011, 07:47
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Re: Controling Pnumatics with joystick.

Quote:
if they use a doubble-acting valve for the cylender and 2 single-acting valves to stop the exhaust they would fail open and allow the whole system to purge
Wouldn't that connect more than one valve to a cylinder input?

<R74> Each commanded motion of a pneumatic cylinder or rotary actuator must be accomplished via the flow of compressed air through only one approved pneumatic valve. Plumbing the outputs from multiple valves together into the same input on a pneumatic cylinder is prohibited.
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