? About 1.5" valve for 3" barrel

Atattack · Sat Oct 29, 2011 4:15 am

Would a 1.5" dust collector diaphragm valve be to small for a 3" barrel? I am assuming will be fine wanted to see if anyone has any first hand experience with this set up. Thanks.

Crna Legija · Sat Oct 29, 2011 4:47 am

what do you want to shoot out of the barrel for light ammo is should be fine.

Labtecpower · Sat Oct 29, 2011 4:49 am

I think the power will be very disappointing....

Sat Oct 29, 2011 4:57 am

Only thing I can think of shooting with a 3" barrel or similar would be soda canons (2.5" barrel, I know) or canned food (which apparently fit 3" barrels) and either of those choices would perform poorly with a 1.5" valve.

To put it in perspective, I get about 70m/s with a soda can using a 2" sprinkler valve at 100PSI with a modest chamber.

mattyzip77 · Sat Oct 29, 2011 10:59 am

There is a 2 inch valve on ebay. Its also a dust collector. I was going to get one, but I have about 10 valves already I need to make cannons for. This will give better performance than the 1 1/2, but how much better, I do not know. Why do you want such a big barrel??? Anyhow, the link is below.

http://www.ebay.com/itm/MECAIR-DUST-COL ... 760wt_1139

Technician1002 · Sat Oct 29, 2011 11:54 am

In testing various size barrels on my 2 inch valve cannon, 3 inch barrel will work, but with limited power. On a 2 inch valve the best power is with a 2.5 to 3 inch barrel. The 4 inch on a 2 inch valve which would be the equivalent of 3 inch on a 1.5 inch valve shows significant power loss. A lower valve CV than mine would make matters worse.

? About 1.5" valve for 3" barrel

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