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2 inch ball 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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2 inch ball valve

Unread postAuthor: daveo » Mon May 07, 2007 7:05 am

I have a free brass 2 inch ball valve,threaded in both ends, is it worth messing with? It is quite the monster compared to a one inch.
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Unread postAuthor: noname » Mon May 07, 2007 9:25 am

YES!!!
Make a ball valve cannon with a 10 foot 1"-3" barrel and you'll crap yourself at the performance.
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Unread postAuthor: Slugfoot » Mon May 07, 2007 12:36 pm

2"= 4x The flow of a 1" valve. I think it would probably suit something like a 1 1/2" barrel best. It would be great if you could spring-load it. :lol:
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Unread postAuthor: daveo » Mon May 07, 2007 1:08 pm

Right now its a little hard to open, I will work on that. I really want to make another 2 1/2 barrel cannon . My first is 2 1/2....seems like lots of stuff fits that barrel.

So if I make a 2 1/2 barrel how long? I was planning 4 inch tank(s)

Here is the picture of it next to a one inch valve, A large picture.
http://www.davedorner.com/images/chev_085.jpg
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Unread postAuthor: daveo » Mon May 07, 2007 3:54 pm

Ok someone please chime in....I have a 10ft section of 4 inch and aprox 6 ft of 2 1/2 inch pipe what size do I make the barrel and tank or tanks?
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Unread postAuthor: frankrede » Mon May 07, 2007 6:31 pm

make a massive cannon with a 100 ft barrel of 1.5" sdr 21 about 24$ from my supplier.
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Unread postAuthor: paaiyan » Mon May 07, 2007 6:35 pm

Hahahahaha Frank, that's awesome. As for turning the valve, you could invent a pneumatic actuator for it. But yes, I say large cannon. Power overwhelming.
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Unread postAuthor: turbohacker » Mon May 07, 2007 7:04 pm

Put the valve in a bucket of soapy water.
Do you weld? If so you should make a metal chainber so that you can take it to over 400 PSI
Defanately make the valve spring loaded or fit it with a pnumatic ram like this one http://surpluscenter.com/item.asp?UID=2007050718594454&item=4-12352&catname=air
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Unread postAuthor: Hotwired » Mon May 07, 2007 7:20 pm

Drown it in oil to make sure it turns smoothly and freely then attach a spring the size of a large sausage to the lever to yoink it open.
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Unread postAuthor: lukemc » Tue May 08, 2007 4:27 pm

i would go with a small 1 or 1.5" barrel with a huge lenght to make up for lowsy opening time. the longer the barrel the more air can escape while the projectiles still in the barrel. most ball valve guns wast about 1/2 of the pressure becaue the things gone before the valve is open
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Unread postAuthor: daveo » Thu May 10, 2007 1:44 pm

The cannon is done, im posting pictures right now in the showcase.
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