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Unread postPosted: Tue Feb 12, 2008 8:36 pm
Author: PVC Arsenal 17
Anyway, unless you can find a big sprinkler valve real cheap, I wouldn't bother. Building a piston would cost less and it might even perform better. But if you do find a cheap valve like I did, it's very easy to modify and make an awesome launcher.

Unread postPosted: Tue Feb 12, 2008 8:36 pm
Author: thespeedycicada
I have never seen NSF-PW pipe with grey text before.All pipe with grey text pipe i have seen has been DWV.

Unread postPosted: Tue Feb 12, 2008 8:38 pm
Author: nboyett
Image

Unread postPosted: Tue Feb 12, 2008 8:39 pm
Author: brogdenlaxmiddie
Nah... Some 4" pipe that I used has grey text and displays a pressure rating. 8)

Unread postPosted: Tue Feb 12, 2008 8:44 pm
Author: fretmelter
lol, that dudes pic says it all.


@pvc arsenal

yes but what if i doesnt preform well. Its realiability vs. flow. I would go for a sprinkler valve. simply due to fool proof operation.

Unread postPosted: Tue Feb 12, 2008 8:49 pm
Author: thespeedycicada
Ok learn something new every day.

Unread postPosted: Tue Feb 12, 2008 9:03 pm
Author: PVC Arsenal 17
fretmelter wrote:lol, that dudes pic says it all.


@pvc arsenal

yes but what if i doesnt preform well. Its realiability vs. flow. I would go for a sprinkler valve. simply due to fool proof operation.


I have a slight problem, maybe it's OCD, but I can't build anything unless it will come out absolutely perfect the way I want it to. I start twitching if I have to improvise (no duct tape, no epoxy repairs, none of that) I've put off so many projects because I know I can't do them without improvising in some way. That's why I'll never build a piston until I have a lathe. I will not use a random piece of plastic wrapped in tape for a piston. That would freak me out.

So until I sh*t $600 out my ass, I'll stick to premade things like sprinkler valves. I don't even care if they don't perform as well. They have never failed me either.

Unread postPosted: Tue Feb 12, 2008 9:37 pm
Author: fretmelter
^ thank you... i feel the same way. I mean how are you supposed to get even close to the performance of something from a factory with scraps from your garage? I really want a lathe too :(

Unread postPosted: Tue Feb 12, 2008 9:43 pm
Author: LikimysCrotchus5
Well piston valves have much more flow compared to a sprinkler valve, and they also open at the same speed and time, depending on your homemade piston, pilot, etc.

If anyone wants, they can get a 3" sprinkler valve, but i have already tried to bargin with him and he never accepted my offer of 40 dollars.
Take a look here

But also pistons are much cheaper to make.
I am making a 4" piston BST vavle because i couldnt afford to get this. I really cant wait until its finished.

Re: 2 Inch Sprinkler Valve

Unread postPosted: Wed Feb 13, 2008 1:00 am
Author: D_Hall
nboyett wrote:Has anyone modded this 2" Sprinkler Valve or any other 2" sprinkler valve?


Sure, I modded that exact valve...

link

Unread postPosted: Wed Feb 13, 2008 1:04 am
Author: OuchProgramme
nboyett wrote:Its sch 40 pvc rated to 280psi


Hehehehehehehe....

I think somebody lost

Unread postPosted: Wed Feb 13, 2008 9:39 am
Author: psycix
You dont NEED a lathe do build a piston valve.
Endcaps of the pipe one size down should fit right in.
You can make pistons out of almost everything, deodorant cans with duct tape around or melt hot glue.

Dont waste money on a 2" sprinkler, build a piston valve and use a 1" sprinkler to pilot.

Unread postPosted: Wed Feb 13, 2008 2:16 pm
Author: MaxuS the 2nd
But then you're screwed if it doesn't work.

Sprinkler valves are almost guaranteed to work straight away.

Sprinkler Valves = Easy use.

Piston Valves = A whole lot of tinkering.

Re: 2 Inch Sprinkler Valve

Unread postPosted: Wed Feb 13, 2008 4:26 pm
Author: nboyett
D_Hall wrote:
nboyett wrote:Has anyone modded this 2" Sprinkler Valve or any other 2" sprinkler valve?


Sure, I modded that exact valve...

link


Was it as simple as modding a regualr 1" sprinkler valve?

Unread postPosted: Wed Feb 13, 2008 5:06 pm
Author: EGOed
You should keep your eyes open for the 1 1/2" Asco dust collector valves that were posted on the forums a few weeks ago....These valves are specifically designed for pneumatic applications and have much higher flow coefficients than modded sprinkler valves...These valves are very commonly used in manufacturing and available on internet stores and can sometimes be found on Ebay very cheap.