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8:36 am
NWBA Member
February 26, 2021
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With hydraulics its more about the pump and the size of the piston and ram. The pressure is a ratio of the cylinder diameter to the ram diameter. The pump has to be strong enough to build the necessary pressure and with a flow high enough for the piston. This video does a pretty good job explaining what you are looking for.
12:59 pm
NWBA Member
Board Member
April 26, 2010
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Make darn sure every component in the system can handle the pressure the pump is capable of. A relief bypass valve set to just below the pump's maximum pressure is a good idea.
Make sure your hoses are sized to handle your flow. If the hoses are too small, you get gas bubbles in your fluid. Gas bubbles are bad. Gas bubbles are very especially bad in the pump.
Make darn sure the inside of everything is as clean as you can get it. Filter your fluid prior to putting it in your system. The rule of thumb is that we get two particles of a given size coming out of the pump for every particle of a given size going into the pump. Spend a few extra bucks for the three micron filter instead of the ten micron filter.
I think 7 tons might be a little light, depending on what you're going to do with it. I'm shooting for 28 tons myself. Batson's design was 24 ton, IIRC.
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