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Fluid Power Basics

Fluid Power Basics
Fluid Power Basics Reservoirs Pumps Fluid Conditioners Pressure Control Valves Relief Valves Sequence Valves Pressure Reducing Unloading Valve Counterbalance Brake Valves Flow Controls Pressure Intensification Directional Control Valves Pilot Operated Check Valve Ratios Load Sensing Accumulators Select Components for Hydraulic Application Manifolds Proper Line Sizing Ft/Sec. = .32 x GPM Net Area When Plumbing an inlet line to a pump Size the to the proper velocity, but also make sure that there are not any elbow, valves, strainers, or any turbulent flow within the last 10 diameters of the hose. Flange fittings work the best without any step sizes. Inside the reservoir one can flare the end of the pickup tube for much better flow characteristics. Life of oil is shorten in half for every 20 degrees F. above 160 degrees. It is best to stay at or under 140 degrees at all times. Think safety also. This does not mean that the oil goes to 200 degrees and then you cool. It means never let it get above 140 degrees. Filters also work better with cooler oil. Geroler motors will fail quickly when the viscosity drops below 70 SUS. Seals will last much longer. Running transmission fluid into the radiator actually heats the fluid. There should be a separate cooler for that fluid and not run into an engine radiator. I Special Thanks Thanks to our industry partners for their contribution with this presentation: Eaton/Vickers Corporation The International Fluid Power Society
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