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Compact Piston Valve

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Compact Piston Valve

Unread postAuthor: clemsonguy1125 » Sat Apr 24, 2010 7:51 pm

On a valve like this, does the piston slide in the bushing, or is the bushing cut down and the piston slides in socket itself? My cap piston failed so I have the rest of the gun with screw holes in the tee, I want to covert it to something like this.
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Attachments
mauler02.JPG
Mauler Valve from launch potatoes
mauler02.JPG (12.61 KiB) Viewed 805 times
100423-160112.jpg
Failed cap piston
dans piston.jpg
This is Dan003400 gun, or this
dans piston.jpg (23.21 KiB) Viewed 798 times
Last edited by clemsonguy1125 on Sat Apr 24, 2010 8:05 pm, edited 1 time in total.
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Unread postAuthor: Gun Freak » Sat Apr 24, 2010 8:00 pm

You already gave up? Yeah I'm pretty sure the Mauler is a compact. It has slices of bushings in it so there are no adapters sticking out.
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Unread postAuthor: clemsonguy1125 » Sat Apr 24, 2010 8:07 pm

Any idea about the new one I just uploaded, Its Dan003400 gun, I didnt give up, I decided it wouldnt work with the tools I have, and it had terrible flow when I tested it anyway
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Unread postAuthor: Gun Freak » Sat Apr 24, 2010 8:09 pm

the one you just uploaded just looks like a normal compact piston valved launcher. Look around the showcase some more or use the search to find some more examples and go at it again. My parts are all ordered, pistons made, and pipe bought. Wish me luck!
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Unread postAuthor: clemsonguy1125 » Sat Apr 24, 2010 8:16 pm

I did but only gippeto has made a cap piston as far as I can tell, plus on your topic people said some worked in different ways, I like dans the best but about normal compact piston valves, do they tipically slide in the bushing, or socket
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Unread postAuthor: Gun Freak » Sat Apr 24, 2010 8:19 pm

They slide on the pipe! not inside the bushing.
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Unread postAuthor: clemsonguy1125 » Sat Apr 24, 2010 8:24 pm

What pipe! Mines not like yours with a adapter and a piece of pipe.
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Unread postAuthor: Gun Freak » Sat Apr 24, 2010 8:29 pm

Tthe "guide" in the diagram you posted by Gipetto.
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Unread postAuthor: clemsonguy1125 » Sat Apr 24, 2010 8:37 pm

But most compact valves dont work like that, Im wondering how dans works though
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Unread postAuthor: Gun Freak » Sat Apr 24, 2010 8:43 pm

The same way as Gipetto's.
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Unread postAuthor: clemsonguy1125 » Sat Apr 24, 2010 8:49 pm

Don't think so, I've seen a buch that show the piston which is a cap
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Unread postAuthor: Gun Freak » Sat Apr 24, 2010 8:51 pm

Ok, the piston in Gipetto's design is a cap!
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Unread postAuthor: clemsonguy1125 » Sat Apr 24, 2010 9:06 pm

No I ment to say not a cap, gippeto is the only person I ever seen use a cap for a piston
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Unread postAuthor: Technician1002 » Sat Apr 24, 2010 10:35 pm

My Mouse Musket and my Dragon both used PVC caps as pistons. An issue with them is longevity. They don't last long before they crack and leak.
Image
This is the 4th piston that cracked in the Mouse Musket. The other 3 cracked in the center of the piston face. The piston is a 1 inch PVC pipe cap.
For this reason I have given up on using PVC pipe caps for pistons.
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Unread postAuthor: clemsonguy1125 » Sat Apr 24, 2010 10:56 pm

I was thinking of casting a bondo piston in a plug and letting it slide in the bushing, would this work well enough of would it crack
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