Ganging two compressors

[goodfellow]

I just lucked out. A friend is moving to Europe and he needed to get rid of his Husky (rebadged CH) 60 gal. single stage compressor. Long story short, I'm getting it for free. I already have a nice PUMA single stage 60 gal. compressor in the shop, but I was thinking of ganging the Husky into the current system. If successful, I'll conservatively have 20cfm@90psi capabilty and 120 gal. air storage.

The elctricals are no problem, plenty of 220v circuits in the shop, but I need some advice on how to effectively gang these two compressors, and then balance out the kick-in and kick-out so any one unit won't get overloaded.

Anyone have experience with this type of setup?

Here are the specs
Husky 7.0 HP (yeah right!!) 12.3 CFM @ 40 PSI and 10.3 CFM @ 90 PSI,
Puma 5.0 HP 12.9 CFM @ 40 PSI and 11.4 CFM @ 90 PSI;

 

[toms73novass]

I did that with a 3 hp 18 gal set at 90 psi kick on and a 2 hp kellog american set at 120 psi kick on. Both plumbed in to the same line. The kellog was the 60 gal 2 stage that was my primary. When the pressure dropped to 100 psi when sand blasting then the second one would start pumping to help with the load. (the kick on is set in the box usually by a screw or nut just dont set it too high!)

To even out the work load every so often just reverse the regulator setting so the other one becomes the primary.

 

[Charles (in GA)]

Put check valves on the tank outlets of both compressors, this prevents the higher pressure from one compressor from backing into the tank of the other and preventing it from coming on. With check valves, each operates independent of the other, you can use either one or turn both on for high draw situations, such as a blast cabinet.

Charles

 

[Major Ramifications]

Put check valves on the tank outlets of both compressors, this prevents the higher pressure from one compressor from backing into the tank of the other and preventing it from coming on. With check valves, each operates independent of the other, you can use either one or turn both on for high draw situations, such as a blast cabinet.

Charles

What Charles said.