Loss of air pressure over distance?

JSB99

Well-Known Member
Would there be any loss of air pressure from a commercial air pump to the air manifold over a distance, or is it best to connect them as close as possible?

I'm thinking about 10' between this 70L/min pump and the 8 valve manifold that comes with it using 3/8" tubing.

Thx everyone :)
 

luv2grow

Well-Known Member
http://www.engineeringtoolbox.com/pressure-drop-compressed-air-pipes-d_852.html
here ya go man. It's standard across the board except material used and temp fluctuations. To answer your question straight up.
Yes, you will experience resistance from a few things. 8 bar manifold being one, 10 feet of run another. etc. good rule of thumb is you can never have a large enough pump. You can always scale back through the flow valve or valves if for some reason you should have to. Just my 02.
 

Atomizer

Well-Known Member
To minimise the losses i`d replace the barb fitting on the pump with a tee and run a loop of 3/8" tube out and back.. Route it as close as practical to whatever you are feeding with the air.. Tap into the 3/8" manifold as required while keeping the legs of smaller bore tube as short as possible.
Fwiw, 70LPM thru 10ft of 3/8" tube will incurr about 8" wc loss (0.28psi), using a 3/8" ring manifold will reduce it to about 2" wc and if you can use 1/2" id tube for the ring you`d get it down to about 0.5" wc. Note, these are just the losses in the 10ft mainline, nothing else ;)
 
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WeedFreak78

Well-Known Member
I thought pressure remains steady, but flow reates are diminished? We had problems in a shop I worked in. They had one long, dead end, air line run to the back of the shop, with a dozen CNC hooked up along the run. It would show full pressure to the last machine, but it wouldn't get the volume of air needed to run. Once we ran a full loop with no dead end, pressure and flow equalized throughout the system and we never had problems.
 
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