Surprise math quiz:

Imma Lugnut has two compressors, one rated at 6.5cfm at 90psi and the other for 6.8cfm at the same. Each has a 20gal tank. If these are linked together what is the resulting cfm?
A. 13.3
B 9.9
C. None of the above

Okay class time is up. What is the answer and would this be practical if someone was considering using a LVHP gun rated for 11cfm?

 

I used to do it all the time, but I think the answer is no you can not just add the 2 out puts but I am not sure. I do know I sprayed a bunch of stuff that way. Get a pipe T then put a male on 2 ends and PSI regulator on 1, then a female. Worked for me just check you units, if one can work at 125 psi and the other at say 140 then make sure you don't go over the max on the smaller. I know sounds dumb but I just turned them on once and blew something in the other.

 

I bet you were kicking yourself over that one.

 

Well, I do use them this way for other purposes, namely blowing out our sprinkler lines in the fall. The biggest problem is getting them both to deliver the same pressures continuously, else one tries to feed back through the other's lines and the regulator will bleed away excess pressure. For sprinkler blow outs this has not been an issue but I'm thinking a spray job may be be a whole other matter.

(BTW, I meant LPHV, not as stated)

 

Why couldn't you plumb in a check valve (one way valve) on each unit before going into the tee. Seems like that way neither pump would affect the other and the lower pressure pump would only kick on with pressure drop below its kick on point.

 

That is why the PSI regulator on the single output hose. Just set both about the same, higher than you want to paint. One will back feed to the other but they will both turn on once the PSI drops. The regulator will keep the gun PSI right though.


I just did a better one than f up my old compressor, my dads new shop has a paint both with 2 compressors all piped into the shop to run anything you want. Well I went to the booth to paint some parts and could not get the gun to put paint out right. Here's a tip even if you have a great booth to paint in with great ventilation and you can not here the compressor run you still need to turn them on. Yes both were off