enerpac hydraulic cylinder

I'm in the market for a 30 ton cylinder to go with my enerpac air
driven pump.
I seen this offer:
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didn't know of two way for enerpac. Then this thought occurred to me.
Would it work to use the pump on one side and then an air line on the
other to make it retract?
Reply to
Karl Townsend
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Karl Townsend fired this volley in news: snipped-for-privacy@4ax.com:
Karl, probably not. Those cylinders have a HUGE amount of "stiction" between the piston seals and the walls. It often takes 200-300psi just to get them moving at all.
When Enerpak cylinders are double-acting, it usually involves valving, so the user can push or pull with the same cylinder.
Some of the portable gas-powered pumps have 4-way valves on them, though.
Reply to
Lloyd E. Sponenburgh
OK, I'll keep watching. All my 10 ton and the very short 30 ton have spring return inside.
Reply to
Karl Townsend
I've seen quite a few H frame presses with external spring(s)...
Reply to

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