Re: [Killietalk] Hydraulic engineering and PVC manifolds

["Koran, David HQ02" <David_Koran at hq02.usace.army.mil>]

I have maintained CPVC and PVC airline/manifold systems for almost 30 years.
For the last 20 I have been using the jerry-rigged 1/3 HP recycled washing
machine motor with a Japanese auto smog pump.  Virtually all of my joints are
press fitted, i.e., no cement.  The pump puts out a tremendous volume of air
and I operated at least 300 outlets and probably can accommodate 3-4 times
that amount.  I run my air to a 4 inch diameter standpipe and my air supply
is then carried around the basement on 1 1/4" to 1/2" CPVC or PVC pipe.  I
have one opening off of the standpipe that has a short length of pipe with an
end cap and rigged a restraining block with good old duct tape and a bungee
cord.  The air leaks there but it is the escape point that regulates the air
in the entire system.  You bleed pressure early in your system to regulate
the pressure throughout, basic hydraulics.  Also, design your air
distribution system in closed loops to minimize drop at the very end of a
line.  You are managing a hydraulic fluid, most commercial air compressor
have a reserve tank.  When working efficiently you pressurize your air tank
and that determines the working pressure of the unit.

DK

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