Connecting 2 compressors together

[andyxxxx]

Sorry for all the noob threads, but I'm still learning.

Anyway, I have a 250ltr 3hp compressor and I want to spray 2k, however I'm not convinced the FAD will be high enough to run both an air fed mask and the gun itself

Now there's a 210ltr 3hp compressor in the yellow paper local to me and I'm considering getting it and instead of running it alongside my existing compressor, connecting the two together.

My question is, how to get them both 'compressing' at the same time? Is it possible to fine tune the pressure switches so much that they always activate together when a certain pressure is reached? Because surely if one activated before the pressure was low enough to activate the other it would never happen and rather than a 460ltr 6hp compressor, I'd have a 460ltr 3hp compressor.

That was my first thought, then I considered possibility of running them from the same pressure switch, however surely that'd put too much strain on the switch and/or the supply, as they're both single phase.

 

[shenion]

You want the pressure switches set so they cut in higher than the minimum pressure you need. I'd set one a bit higher than the other.

If you are using more than one can handle, the pressure will drop and the other will cut in. If using less only one will run.

My tools run a 90 PSI, the compressor cuts in at about 100PSI and off at 120. I plan to add a small one that cut in at 110PSI and out 1t 130. That way I won't hear the big one cut in at 2:00AM when the temp cools and the pressure drops

 

[Engineer]

If you intend to get into pro spray work and will be using 2k materials on a regular enough basis to mean that air fed masks are required, then have a look at self powered models along similar lines to: http://solutions.3m.com/wps/portal/...12H2_nid=GSYPJ57R4QgsF3RH7CD92NglM4NNWRVQHFbl

 

[rtbcomp]

It's no problem, have a look here http://www.mig-welding.co.uk/spray-painting.htm.

If the tanks have different maximum safe working pressures (SWP) just make sure you don't exceed the lowest SWP.

 

[andyxxxx]

Ah yes of course, I was thinking along the lines of the first one to cut in would raise the pressure so the second one didn't cut in, but if the tools are still using the supply of course the pressure will still drop, otherwise one compressor would have been sufficient.

I did read the tutorial bit but was still unsure, it was early in the morning though

If you intend to get into pro spray work and will be using 2k materials on a regular enough basis to mean that air fed masks are required, then have a look at self powered models along similar lines to: http://solutions.3m.com/wps/portal/...12H2_nid=GSYPJ57R4QgsF3RH7CD92NglM4NNWRVQHFbl

I was under the impression that any 2k spraying required a mask, not just regular?

 

[madkayaker]

at work we have a system where there is a BIG compressor that feeds a load of machines and each machine has a small compressor in them. the switches on the small machines are set lower than the main tank so that if the big tank fails we don't loose air. i was also under the impression than any 2k work needed an air feed mask