10 bar air compressor. Where to find cheap?

[Monomial]

I have a need for a 140 PSI air compressor for use in a pressure swing absorption system. The flow rate is not terribly high. Only an average of around 30 liters per minute. The duty cycle is around 50% with 30 seconds of generation followed by 30 seconds of exhaust.  I just need an inexpensive compression system to drive it.

 

The problem is nearly all the cheap air compressors I can find are only rated for 8 bar.  There are 10 bar models around, but they are ridiculously expensive (over 20,000 baht) and horrifically oversized for my requirements.  Does anyone have a suggestion for a low flow rate, 10 bar compressor that won't break the bank?

 

I see these really cheap 12v models around rated to 300 watts and 150 PSI, but a few problems. 1) I don't believe the ratings.  And 2) They don't come with a receiver tank, so the air would be extremely hot and I'd need to find some way to cool it (which, of course, would also lower the pressure).

 

Advice appreciated.

 

 

[mogandave]

How much do you want to spend?

 

I would all Puma or one of the other local brands, pick a model and have them set it up for higher pressure.

[sometimewoodworker]

25 minutes ago, Monomial said:

I see these really cheap 12v models around rated to 300 watts and 150 PSI, but a few problems. 1) I don't believe the ratings.  And 2) They don't come with a receiver tank, so the air would be extremely hot and I'd need to find some way to cool it (which, of course, would also lower the pressure).

A receiver tank would not be difficult to adapt from a standard gas cylinder, for a big one or probably even an LPG tank. Though I doubt the long term reliability as they are almost certainly made for very occasional use. 

[VocalNeal]

STANLEY DN200/10/5 AIRBOSS

 

 

This doesn't solve where, though. That depends on where you are. 

 

Edited February 28, 2020 by VocalNeal

[sometimewoodworker]

On 2/18/2020 at 7:38 PM, Monomial said:

I see these really cheap 12v models around rated to 300 watts and 150 PSI, but a few problems. 1) I don't believe the ratings. 

Why a pump like that will be useless for you