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Search: Posts Made By: sparkycuda
Forum: Construction Equipment Tech 09-02-2017, 10:41 AM
Replies: 13
Views: 2,395
Posted By sparkycuda
Re: 2 questions

You are describing an open-center system - pump discharge goes through the valve & back to tank in the "off" or neutral valve position. As you open a valve to direct oil to a cylinder, the...
Forum: Construction Equipment Tech 08-23-2017, 03:26 PM
Replies: 13
Views: 2,395
Posted By sparkycuda
Re: 2 questions

Closed systems (like equipment hydraulics) use positive displacement pumps such as gear and piston types. Positive displacement means when the pump turns, fluid is moved, without much power loss,...
Forum: Construction Equipment Tech 08-09-2017, 10:26 AM
Replies: 13
Views: 2,395
Posted By sparkycuda
Re: 2 questions

Hydraulic pressure is a function of close-fit of pump internal parts (pump efficiency) and the resistance in the system. A good hydraulic pump will build pressure regardless of flow (volume) in the...
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