Re: Open center- Closed center hydraulics

Posted by paul on July 10, 2006 at 21:27:53 from (66.44.138.43):

In Reply to: Open center- Closed center hydraulics posted by Mark on July 10, 2006 at 11:06:16:

Open: Pump runs fluid all the time, pressue varries from near zero to relief pressure (2000-25000# or so on newer systems, hope for 1000# on an old unit...). All devices downstream need to be set for open system to allow the fluid to flow through & return to the tank. Generally a 'series' type of connection, one device plumbed to the next device.

Closed: Pump keeps a steady high pressure (2000-2500# maybe is common), the amount of fluid flowing varries from zero to full capacity of the pump. All devices downstream should be set to closed type, no open centers or your pump can't make it's pressure. Generally a 'parrallel' type of plumbing, can Tee off the lines.

Closed is found on bigger, newer tractors. In general.

You will stumble across hybred systems, that just plain confuses.... ;)

--->Paul

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