Re: hydraulics

Posted by two mile on May 10, 2007 at 06:34:07 from (66.102.50.57):

In Reply to: hydraulics posted by wanabe farmer on May 09, 2007 at 20:19:42:

You asked about open and closed center valves, and their differences. The valves funtion differently but it is because of how each system functions differently. Closed hydraulic systems usually have a radial pump that will only actuate when there is a drop in pressure. the pistons in the pump are held away from a cam by the pressure in the system. Any drop in pressure and the pump will immediately respond. An open center valve in this system will keep the pump running unneccesarily. In an open center system, the fluid is circulating back to the resevoir, as stated in the previous post. when the valve is actuated, the fluid flow is diverted, there is a momentary lag in pressure but that quickly builds to needed levels. Hope this helps>

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