by Kons
(Gr)
Hi there,
Is it possible to connect two small air compressors?
Plumbing dual compressors
I’d like both to be operated by one pressure switch with separated discharges on the same tank accompanied by 2 check valves sharing the same relief line of the pressure switch?
Doable?
_____________________________
Connect two small air compressors
Anything’s possible, I guess.
If both pressure switches “saw” the same tank pressure, if they both had the same cut in and cut out, they may cycle OK.
Not understanding why you would want two discharges? Why not one, to a manifold, into which you could plug as many couplers as your manifold had spaces?
“accompanied by 2 check valves”, not between pump and tank, as then the pressure switches might not get a pressure reading from the tank.
Seems like an odd request. More details about why you need to do this might help.
_________________________________
Dual compressors
Sounds like you just want to share the air between two workers, but one compressor isn’t quite big enough for either worker.
Keep it simple. Just tie the two tank outputs together, and run that to a manifold with two outputs.
No need for check valves or any of that.
If they both try to start at the same time and that’s too much for your power supply, just adjust the cut-in on one of them a pound or two lower than the other, and they’ll power up in sequence.
If you want to even out the wear on them, then reverse the cut-in settings every so often.
If that’s not what you want, what Bill said…
____________________________________
Schematic
Hi again
i think my English are not the best, neither my pneumatic skills. I think my drawing might help on what i try to mean!
(Graphic has been added to the top of this thread – Moderator)
________________________________________
Dual air compressor
As mentioned before, I think we understand what you wish to do, and what you propose in your drawing would work, but based on what we know, it is not necessary, and overly complicated.
The question remains, why do all that? Are you trying to save money on the pressure switch?
Please give us an idea of what you are starting with. For example, a couple of bare compressor pumps with no tank or controls? Or a couple of complete stand-alone compressors? Or is that to be determined?
___________________________________________
Dual air compressor setup
I only have x 2 small compressors so far (piston-150watt each,used) and intended to be used on a
50ltr air tank (which I haven’t bought yet,with all the additional components required).
I was told that one alone is too small for the desired capacity.
No ,I don’t try to save money on a secondary pressure switch, I just thought making them start/stop simultaneously, as one, because of the low HP output.
I used to work on sheet metal fabrication and finally decided to make a sheet metal enclosed air compressor-vertical box to add to my home workshop.
____________________________________
Multiple compressors
OK, I thought that might be the case.
Go here:
https://www.harborfreight.com/air-tools/air-compressors/10-gal-25-hp-125-psi-oil-lube-air-compressor-69092.html
then look at the reviews – scroll down to the one with three compressors. Check out the photo.
That’s how to do it. The manifold on the floor at right is an off the shelf thing, but you can use whatever you want, and the combined output on the single hose can be used directly, or eliminate the hose and connect it directly on your proposed tank.
You may or may not need separate power connections as the author has done. You really don’t want two or more compressors coming on at the same time as that will tend to strain the electric service.
The only caveat is that the regulators should either be removed or left wide open. If you don’t follow that, then the regulator with the lowest setting will bleed off air to get to its setting.
The scheme applies to as few as two up to however many compressors you need. You don’t need extra check valves as they are self contained on the compressors.
Feel free to ask if I left anything out.
_____________________________________
Dual Air compressors
Hi there,
I saw your link and it did helped, as also generated a new approach.
Thanks all for your answers and guidance!
_______________________________________
Dual air compressor
by: Doug in s.d.ca.
Kons –
Cool. Thanks for the update.
Send pix when you get your setup going, please.(!)
Have fun.
New comment? New question? Please add it here along with photos to help others help you with your compressor and equipment problem!
Hello, found this because i recently got an older F350 with a service box on the back. After removing some panels inside the box i found a system. Single 15 gallon tank with twin compressors. Now it would seem that when i wire one up it will run and run and run (gave it about 20 mins before cutting power while still running) and i build a little pressure, try to wire both and i blow any breaker i’m on. Both have thier own pressure switch (which i have no idea how to find out what it’s set to. I… Read more »
Combine two compressors to increase cfm.
I have a Rolair VT25Big 2.5hp 6.5cfm 5gal tank with 100 ft ⅜” Rolair Noodle hose and a Hitachi 10 gal reserve tank, 2 3 ft jumper lines to connect to hose reel and Hitachi tank. I want to increase my cfm to run a paint sprayer and a needle scaler. If I purchased another VT25BIG, (several reasons budget, limited electrical,) I would get 13.5cfm? Run lines from both compressors to Hitachi, line out of Hitachi to tool.