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fridge compressor setup

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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fridge compressor setup

Unread postAuthor: FishBoy » Wed Mar 18, 2009 9:17 pm

Ok, I have already figured out all the electronics for my fridge compressor, and I have figured out which ends are which (input/output); now I am not sure how to set up the guage, hose, fittings, etc.


1. If a I have an on/off switch, is a shutoff or bleed valve necessary? If so, where should it be (before the hose with the guage or at the end)?

2. Will ordinary quick-disconnects like on regular air compressors work or will I need high pressure fittings (if so, what kind)?

3. Where can I find air hose rated to 600+ psi?

4. Does it make a difference if any of the "oil mist" gets into the pressure guage?

5. Will pretty much any light/thin synthetic oil be sufficient to put into the compressor to replace the oil lost during salvage?

6. What pressures are small fridge compressors typically capable of?

And finally, if you have any pictures of your fridge compressor setup, please submit them for reference! Thanks!
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Unread postAuthor: POLAND_SPUD » Thu Mar 19, 2009 12:19 am

1. yes it's usefull.. you can use a ballvalve to vent the system when you need it... obviously the best place is just before an air hose becasue it's easy to connect it to threaded fittings by adding one more T

2. they work fine if you vent the system before disconnecting
most of them are rated up to 35 BAR, but if you want to there are high pressure versions as well

3. shops selling equipment for hydraulic systems

4. no it doesn't

5. I always use engine oil.. but you can try.. I can't find any reason why you couldn't do it

6. ~500 psi
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Unread postAuthor: psycix » Thu Mar 19, 2009 12:28 pm

1- You will not be able to disconnect a QD that has like 300 psi inside. Bleed valve is necessary.
2- I use a normal one on my fridgy, which goes up to 450. I think you should be okay.
3- Cant help you with this one.
4- Doesnt really matter. Though it can clog up your cannon, I think.
5- Uh oh, I took all the oil out and didnt put anything back in.... Should I?
6- Usually 400-800 psi but can be even more. Size doesn't matter for pressure, just for flow.
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