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  1. danhelgerson

    O-rings Failing?

    If you have a problem with static seals leaking over time, you may want to look at the energy loss in the system. I had a discussion with a plant engineer in which he told me that O-rings leak but NPT fittings do not. On further examination, it was learned that there is a great amount of heat...
  2. danhelgerson

    Running Cylinders in Series for Synchronization

    I saw a discussion started about running cylinders in series for synchronization. Budt responded but now I cannot seem to find the thread. Bud knows his stuff. I just want to clear up a point. When hydraulic cylinders are run in series, the first cylinder sees the entire load while each...
  3. danhelgerson

    Reducing air consumption

    You can reduce the amount of air consumed in a circuit by replacing the meter-out or meter-in flow control with a meter-in pressure regulator. The fact there is a meter-out flow control indicates that there is more pressure and therefore more force available than is required to move the load...
  4. danhelgerson

    The cost of compressed air

    Air is not free! As a rule, it takes about .25 hp to produce 1 scfm. At a cost of $.08/Kwh, this means that an air consumption of 120 scfm running 24/7 would cost over $15,000/year.
  5. danhelgerson

    Heat in hydraulic systems

    Heat is generated in a hydraulic system whenever the fluid moves from high pressure to low pressure without doing work. It is a measure of the efficiency of the system. For example, if a pump is directing fluid across a relief valve, all the fluid is going from high pressure upsteam from the...
  6. danhelgerson

    Introduction

    I started this group because I did not find any other source for information specifically for Fluid Power. I am a Certified Fluid Power Specialist and enjoy learning and teaching about Fluid Power issues. I plan to post tips and ideas as well as ask my own questions where I need help.

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