I have a 5 hp Sanborn compressor with air piped around my shop. I'm happy with the setup but would like a tad more capacity. I also have a 3 hp compressor sitting around doing nothing at the moment. Does anyone see any issue with me just paralleling the 3hp and 5 hp compressors. They would end up at opposite ends of the shop. Thanks in advance.
I do it all the time when I run my sandblaster. No problems. Set the regulator on one a couple psi higher so it does all the work until it can't keep up. Then the other one kicks in when there's a drop in line pressure.
Karl
I have done it on many occasions even one gas engine powered and one electric. I'm getting ready to add a 30cfm compressor to our exsisting compressor at work, so we can get our air volume up to support our equipment..This is done in industry all the time. I had a check valve on a the incoming air from the second compressor into a "T" into the main compressor tank and then a quick- connect going out to the sandblaster.
Do you think the check valve is required?
. As I sit here typing this I realize
Never thought of that myself till you mentioned it. I use a double ended male adapter to fill my air pig and the valve will make things much simpler, thanks. Gerry :-)} London, Canada
You need it so the second compressor isn't starting under load. Gerry :-)} London, Canada
Our big compressor went out about 3 months ago and all I had was 2 smaller units. Our consumption is high and the one compressor would run constantly because of minor differences in the settings and balance. I set the 2 units side by side and wired both motors to the same pressure switch and all is well until somebody comes up with the initiative to get the other unit repaired.
JohnF
Doesn't need to be there if there is a check valve between the pump and tank at the unloader. Neither compressor will start under load. This check valve I was talking about is on the load side of both compressors and there only to prevent the ball valve from releasing air from the main compressor when the second is not hooked up.
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