joining multiple small compressors for mobile use.

[normspanners]

Hi just wondering if anybody has done this, I do have a couple of decent size 12v compressors but physically mounting them is a problem.
now lidle have had some small 40 ltr/ minute compressors 12v, for silly money they have decent sized motors and seem to run ok, i bought 5 of them they can be easily hidden /mounted around the underbonnet of disco and was going to combine the outputs and switching and put them on a relayed pressure switch, and airside into a stainless air tank, my thoughts are 1 check valve or 5 ? as I dont want the head pipes remaining pressured, size of cv is a problem, also cost as some are dearer than the compressors were! After all each comp will have its 'in head' reed valve and starting isnt a problem coz of the size of piston
Just wondering if anybody had tried this, and their findings .

 

[WorkshopChris]

Whenever i have joined compressors i have always fitted a NRV to each unit and adjusted the pressure switches so that all start at separate pressure to avoid a high start load.

 

[normspanners]

Whenever i have joined compressors i have always fitted a NRV to each unit and adjusted the pressure switches so that all start at separate pressure to avoid a high start load.

Thanks Chris but the pressure switches are bigger than the compressors! so am only planning on one PS and with DC I dont think startup loads a problem it will be only be 50 ish amps anyway and as a starter takes 500ish ...
By my calcs it will be approx 700W or Ihp of compressor not huge but will get there,---eventually, if I use 25/30 ltr tank ---- ample enough to have a ready supply of air when needed for tyre pressure, blowing off, quick little die grinder job etc.

 

[Robotstar5]

When they all fire up you can tell folks you have a compressed air powered Disco?

 

[slim_boy_fat]

@normspanners You planning something like this?

 

[normspanners]

ERH NO------ it does that enough whilst I am driving it, my tools go everywhere as it is !!

 

[dannyp]

if you dont have air con on your disco retrofit an aircon pump, they make very good compressors

 

[normspanners]

if you dont have air con on your disco retrofit an aircon pump, they make very good compressors

Thanks Danny, yeah I know, we used to use them on the tranny service barges using the same idea, worked ok but if I set this up as an easy fit and remove, I can swap it from vehicle to vehicle easily and quickly plus if I am working at a place with mains, I could just run it off the batteries and have a charger to keep the battery topped up that would save having to drag my portable 240 suitcase compressor around. Not sure how much air it will give, at the moment they say 40 ltrs per minute so in the real world say it is 25 average and I have 25ltr tank I am guessing it will take one comp 10mins to fill to 10 bar, so with 5 it might take two mins ??? that is not too bad I dont use much air now with the milwaukee gear but it is very handy for little jobs to have a 10bar tank at your disposal.
I tried one on the disco tyre the other day and it was at about 25psi and it fairly quickly got it up to 60.