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Re: Re: Re: explain 4way open center
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Posted by Bill From Ontario on October 15, 1999 at 18:05:50 from (206.172.191.224):
In Reply to: Re: Re: explain 4way open center posted by Roger B on October 13, 1999 at 21:07:08:
Generally, closed center systems use a variable displacement pump. This way, no oil is flowing when no demand is placed on the system. The oil would heat up excessively and break-down quickly if it just by-passed through a relief valve.
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