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Originally Posted by Chris Fultz
Single solenoids return to their normal position when power is shut off so the cylinder will not maintain its' position.
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Just to clarify, a cylinder hooked up to a single solenoid valve has a "home" position (which will be either extended or retracted, depending upon how you tube it up).
A cylinder that is in it's home position when the power is cut will stay in that home position (which means it will maintain that position).
A cylinder that is not in it's home position when the power is cut will return to it's home position (which means it will not maintain that position).
I hope this helps.
-Scott358