Air compressor and tank.

G/day Sand man. Mate gas cyls are rated about the same as fire extinguishers cyls as "fisho" said about 33MPA which works out to about 478 PSI. I think "Fisho" may have got his maths a little mixed up on the 4700PSI thingy... Buggered if I would be hanging around for that pressure test aye??????
Cheers Ron

OK, thanks for that info Ron & Fisho.

The extinguisher bottle shape is more practical as far as mounting goes though.

Thanks for the comment re gas cyln - may have to check what applies in Qld.
I didn't explain the 48hrs part too well - did I Fisho.
After the cut-off switch worked, it was disconnected from 12V. 48 Hrs later the pressure was still in the lines. I then released the pressure and left it disconnected.
Thanks....................Keith

Thanks for the reply. Would you mind expanding a bit on the comment.
I would expect the compressor head may have a valve on the outlet side, hence the reason it can pump to 100 psi (or higher).
If you have experience/expertise in the area, could you expand a bit on why the need for an extra one way valve ..........Thanks.................Keith

Hi Robin and thanks for the reply.
I don't actually need a tank, and your comment made me re-evaluate the idea.
More just for convenience - when need to air up tyres, the first would get a boost from pressure in tank - but then again I should be learning to be more patient.
The air line already has a small reservoir effect, and I can do without the weight of a tank.................thanks.........................Keith

If you need a one way valve I have a spare one I would be willing to let you have for , say, $20-. It has 1/4" BSP female fittings at both ends. I also have an old gas bottle of about 4kg capacity which has been altered to take a brass barb in the top (also 1/4" thread size), which you could have too (but postage would be a killer I suppose).
The value of the tank (even if you don't have an air locker), is for things like blowing the bugs out of air cleaners or radiators......or even dusting down the instrument panel in your 4x4 etc. Ever had to clean a part while you're doing some bush-mechanicing out in the bush? Air pressure (in a quick blast) is great for this too; and many other similar tasks.
However, it is of practically no use at all as far as assisting to reinflate tyres. You'd need a HUGE air receiver tank to accomplish that task. And, if you don't have enough air in your tank to do all the tyres, then the poor ol' compressor is gunna be trying to refill the tank AS WELL as the tyre/s. So, if you do have a good size tank (say 20 litres plus), you'd be wise to also have a cut-off tap on it, so that once it's supply has been exhausted, you can shut it off so that the compressor is only trying to do the tyre/s; not the tank.