Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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Tobin
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Sun Mar 06, 2011 1:24 pm
Im not very familiar with english so i dont know the name of these parts in english, so i would like to know whats they are called in english... However, this kind of quick connect fittings:
http://www.shoplet.com/Dixon-valve-Air- ... DCP21/spdv
How how preassure can those handle, above 40 bar? The other part, that you connect tho this, whats the name of those? And can i buy those threaded connector instead of the ordinary hose-barbs?
My goal is to connect a fridge compressor with a 6mm copper pipe to this kind of "quick connect fitting" i described above. How is your idea to make this?
Sorry if my english is a little bit stupid
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Gun Freak
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Sun Mar 06, 2011 2:11 pm
The brass type of those should have no problem holding 40 bar. However, they will be absolutely impossible to disconnect or connect to it's female counterpart at that pressure. You would need to use some kind of vent valve in order to disconnect it.
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saefroch
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Sun Mar 06, 2011 2:19 pm
You're looking at the male fitting there, and what they connect to is a female quick connect or quick disconnect hose fitting. You can certainly use those with threads on them if you have a female threaded connection to attach them to. Those should handle 40 bar fine. I've used similar fittings to about 70 bar, no problem.
Your english is perfectly fine.
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omniscient
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Sun Mar 06, 2011 4:07 pm
There is no way that I'd trust that (Dixon) type of quick-disconnect fitting at 40bar, let alone 70 bar.
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Tobin
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Sun Mar 06, 2011 4:44 pm
The hose and fittings in the upper link is perfect, guess there is threads in the black tube the gauge is placed on?
Now the hard work is to find a 6mm commpresion fitting-thread fitting here in sweden. Or maybe solder a copper fittings first? But then i need a copper 6mm fitting and that doesn't seems available here in sweden either.
But will a 6mm commpresion fitting handle 40 bar?? Or how can i connect some kind of fitting on the 6mm outlet on a way that will withstand the pressure?
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Gippeto
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Sun Mar 06, 2011 6:49 pm
how can i connect some kind of fitting on the 6mm outlet on a way that will withstand the pressure?
Silver solder (braze) a brass fitting to the tube. It'll gap fill somewhat...better fitting is...better.
Get the brass fitting from a hydraulic shop....don't use fittings made for low pressure applications. Look for a "heavy" wall on the fittings.
No worrys about anealing the copper tubing as it's already in an anealed state.
Brazing a compression/pipe thread fitting and then using pipe thread from there would be my first choice.
Something like this...and just braze it on.
http://www.swagelok.com/search/find_pro ... d3fd3672c3
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Liberalism is a mental disorder, reality is it's cure.
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Gippeto
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Sun Mar 06, 2011 7:02 pm
Gun Freak wrote:A compression fitting will be fine at that pressure.
Got a link to a rating? Like to see it.
"It could be that the purpose of your life is to serve as a warning to others" – unknown
Liberalism is a mental disorder, reality is it's cure.
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Tobin
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