Thomas Powderly wrote: > ok ok > an air over water amplifier can also reach any desired amplification ration > its simply a function of area (air piston area / water piston are = > amplification, input 100 psi air get N psi out ) > sure you can do it other ways, > i just wondered which technology you used > Because of the compressibility of air, it is an inefficient means of transferring a lot of power. (Air heats up in compressor, cools down in air motor.) So, hydraulic or direct mechanical drive of the pump is the most efficient. I've taken a good look at several Flow machines during a demo for our shop, they use direct electric motor drive with a VFD. Remember, water jet machines start at about 15 Hp, and most commercial machines run 25 - 50 or more. You might need a 100 Hp compressor to feed one of these.
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