i don't see how a pipe could handle the same pressure on the outside as the inside, as this demonstrates, you only need to crush the pipe on the inside on the outside it needs to rupture

most of the larger dryer units are filter dryers, and as these go on the inlet you can face them downwards so any moisture can drain out, although this would not be an issue as the desiccant would already be useless by now and not collect any water but it will filter the air..

the homemade job ...

the large blue job is the filter/dryer and to remove the oil stuff the outlet pip with steel wool (the coarse stuff like a kitchen scrubber) and that will/should catch most of it. just make sure it can flow back down into the compressor

you shouldn't need to put oil in it unless you start losing it on the outlet, then you could just collect and return, or just make sure the outlet runs upwards for a short while so it can run back in by itself.

you should have kept the dryer/filter unit if it was the to stop dirt ingress into the ...

my stock

the ones from bellpro are not the best.. i got some and was disappointed, just make a piston valve

sas380 wrote:what,s the pressure rating of copper planning on building a double barrel shotgun thx in advance

what grade of copper are you buying? what dia?

http://www.kembla.com.au/kembla-plumbing-tube

you can carefuly cut a slot in the DWV and then with a heat gun or hair drier heat up the glue and then peel the DWV away.. make sure you clean all the old glue off before you use the new fittings

i have some 1/2" QEV's from bellpro (i bought 3) i wouldnt even consider using one as the main valve the ports are tiny,, i might use it as a pilot actuator valve though

i tend to get the slightly more expensive valves ($15), i have had to glue o-rings on though at 500+ psi, try doubling up the shaft o-ring, and give the whole thing a good grease up

if your in oz then try the big green shed (bunnings) they have a good range of springs that might work with a few mods to the design

did the slug go trough the bin at 400 psi? my copper would atleast dent the you know what outta it at that range

thanks i have read you talking about that before what i really need is pressure ratings will brass fittings handle unreged co2?

i am planing to build a co2 hammer valve gun that uses "soda stream" bottles directly screwed into the system (i have a few and i can refill em myself)

i am planning to use all brass fittings on the pressure side (threaded unions etc no pipe) and i have been looking for any pressure ratings and ...

just some damage pics

@500psi number 0 sinker at about 6 mtrs into 12mm marine ply and 2 sheets of thin steel, went trough the ply and one sheet of steel almost through the next
http://i22.photobucket.com/albums/b338/cain666_4u/cannon/_MG_1739.jpg
http://i22.photobucket.com/albums/b338/cain666 ...