hydraulic fittings
have anybody used hydraulic pipe and fittings to make cannon for high pressures . they cost much but I live in Finland and I cant find high pressure fittings for compressed air . hydraulic pressure raiting for those fittings and pipe is over 600bar so do you think that its ok to use them for hybrid or high pressure cannon
Yes but you're going to have to fork out waaay too much.
They're made to much tighter tolerances than pneumatic fittings and I've heard they have to be because o-rings deform at hydraulic pressure so they can't be used.
Getting pneumatic fittings mailed in from another country would probably be cheaper...
They're made to much tighter tolerances than pneumatic fittings and I've heard they have to be because o-rings deform at hydraulic pressure so they can't be used.
Getting pneumatic fittings mailed in from another country would probably be cheaper...
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mark.f
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Not to mention most hydraulic fittings I've seen over in the state are pretty small. You can get bigger ones but they go up in price a lot.
Only hydraulic fittings I've seen that look useful in pneumatic applications would be the double shut-off quick-disconnect couplings. That way, when you disconnect a 50' air hose, it doesn't shoot around smacking things if you don't hold it, like mine does.
Only hydraulic fittings I've seen that look useful in pneumatic applications would be the double shut-off quick-disconnect couplings. That way, when you disconnect a 50' air hose, it doesn't shoot around smacking things if you don't hold it, like mine does.
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spudthug
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i have a pair of those (mine are 3/8) and i am trying to find a use for them...any ideas?Only hydraulic fittings I've seen that look useful in pneumatic applications would be the double shut-off quick-disconnect couplings. That way, when you disconnect a 50' air hose, it doesn't shoot around smacking things if you don't hold it, like mine does.
as for teh hydraulic fittings..why not order from a online site? so ur saying u have no hardware stores within 20 miles of your house? i would cry...lol...
4" piston valved cannon-half done..( i spilt my cement...)
Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Jolly Roger
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Yeah I'm trying to find something along those lines. Does anyone know what hydrualic rams etc. use instead of o-rings?
Actually they do use o-rings 
I'ts just that more commonly you'll find they use more complicated non-o-ring seals like these instead.
I'ts just that more commonly you'll find they use more complicated non-o-ring seals like these instead.
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Jolly Roger
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Yeah thats what I was reffering to. Cheers. I think I might just stick with the o-rings though, they seem a little too complex. I don't think the o-rings will fail on me if I use them properly. 
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frankrede
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woot woot nptf threads!
I called a local hydraulic fittings supply and the prices were outrageous they wanted $70 for a 1/4" check valve. Rated to some ungodly high pressure though
I called a local hydraulic fittings supply and the prices were outrageous they wanted $70 for a 1/4" check valve. Rated to some ungodly high pressure though
Current project: Afghanistan deployment
Heh
It's like using inch thick steel for your hairspray combustion
It's like using inch thick steel for your hairspray combustion
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frankrede
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Haha, I have seen it before!Hotwired wrote:Heh
It's like using inch thick steel for your hairspray combustion
But with 1/2" aluminum and propane:(
Current project: Afghanistan deployment
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TwitchTheAussie
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Where are you from mate? .Jolly Roger wrote:Yeah I'm trying to find something along those lines. Does anyone know what hydrualic rams etc. use instead of o-rings?
Raise your horns if you love metal.
CpTn_lAw
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Jolly Roger
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I'm from qld, aus, but I think I might just stick with the o-rings for now anyway.
