Hey mate. ... the 2 I have...I would say are mid size comps. .. you can get somea fair bit biggeri think these are from a standard fridge unit..I probably wouldn't go any smaller for your use but you would be fine with just 1 Fir sure. .... so long as you installa check valve directly after the comp pressure is only really governed by your tank so 8 bar is no prob at all
Thanks mate, my tank is about 40 cm long and about 20 cm in diameter, I intend to lie it on it's side with the comp above it with the intention of keeping the whole unit within the same dimensions, meaning 40 cm wide and 20 cm deep (front to back) the height isn't important but don't expect it to be higher than 50 or 60 cm, with these dimensions it will fit snugly under my worktable at either side so that I will rarely ever have to move it.
I've had a look around for the parts I don't yet have and can't believe how cheap they are, from what I've seen so far I can build mine for under 50 quid if I can get a donor or used fridge motor, the beauty of that is the size I need is easy to get free, I might even be able to find a donor compressor, I already have tubing to make the frame and my father in law has every kind of pipe bender you could think of, he used to be a ships diesel fitter before he retired and refuses to let go of his tools, lucky for me,
It will be a nice project for the winter and fun to do, your little walk around in the video is an absolute diamond and it shows everything very clearly, even a clueless idiot like me can understand it,
OH, And I found 2 regulators in my hobby room, one is 8 bar (just what I need) and the other is 12 bar, depending on the fridge motor I might just use that one, it came off the same compressor where the tank came from and I think I have some fittings that came from there too
I'll post a progress report when I start.