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Re: Open Center vs. Closed Center Hydralics
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Posted by hervé on February 11, 2000 at 10:40:36 from (164.138.75.164):
In Reply to: Open Center vs. Closed Center Hydralics posted by Greg on February 11, 2000 at 10:18:41:
hello, i try to make a simple response on a big subject. On a tractor you can have the two types. With an open center, the pump is a gear pump, so the flow rate is always the same. When a remote valve on the tractor is in the neutral position, the valve receive the flow and return it directly to the tank with no pressure.
With a closed center, the flow can't travel the the remote valve on the neutral position so the pressure increases. With an axial pistons pump, the plate which drive the pistons came at a right angle with the drive shaftwhen the pressure increases, so there is no stroke for the the pistons, so you don't have flow. The most important advantage is to use one pump for all the function of the tractor. I hope this help you. If I made some mistakes, excuse me but my english is a little bit difficult for a french man like me. Hervé
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