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How to further mod a sprinkler

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How to further mod a sprinkler

Unread postAuthor: noname » Wed Mar 28, 2007 11:02 pm

Well, I'm needed a valve for a new cannon. A sprinkler valve doesn't have enough flow, and a piston valve is too bulky, and not low profile. So, I modded the $hit out of a sprinkler.

WARNING: Modifying a blowgun may ruin the seal if you're not careful. This has happened to me, don't blame me if you mess it up.
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Attachments
TIM 015.jpg
Another shot of the new version.
TIM 013.jpg
The diaphragm is made from 1/8” sheet rubber, and a steel token slightly smaller than the spring, so the diaphragm is aligned.
TIM 013.jpg (14.36 KiB) Viewed 6804 times
TIM 012.jpg
The new version, capable of 175 psi, with loads more flow.
TIM 011.jpg
Part 2: Modifying the diaphragm
The “regular” version.
TIM 009.jpg
The starting hole was smaller than a .177 BB.
The finished one is over 1/4.” Now put everything back together.
TIM 008.jpg
The finished bolt should be about half the width of what there was to begin with.
TIM 006.jpg
The starting bolt.
TIM 005.jpg
The inside parts look like one, but they're two pieces.
TIM 004.jpg
The internals.
TIM 003.jpg
Take out everything but the spring.
TIM 002.jpg
Unscrew the internals.
TIM 001.jpg
Part 1: Modifying the blowgun
A regular Husky blowgun.
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Unread postAuthor: noname » Wed Mar 28, 2007 11:03 pm

How'd the picture of the new diaphragm get up there? :lol:
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Unread postAuthor: A-98 » Wed Mar 28, 2007 11:07 pm

very nice job, however, it seems that the new diaphragm is in a different place(lower down) than the original, so how exactly does it work?

is the metal peice on the new diaphragm a coin?
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Unread postAuthor: noname » Wed Mar 28, 2007 11:11 pm

It is lower down, which means it moves up, allowing an assload more air through at once. It's like a really high flow QEV, except 8 bucks cheaper and inline.
The metal piece is indeed a coin, a token to be exact. It's thick steel and fit right into the spring, so I used it.
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Unread postAuthor: A-98 » Wed Mar 28, 2007 11:14 pm

OH! i see how it works now. silly me :oops:
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Unread postAuthor: hi » Thu Mar 29, 2007 12:08 am

Do you have to drill out the blow gun? Thats really cool, im going to do that to mine.
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Unread postAuthor: noname » Thu Mar 29, 2007 5:39 pm

You can, you'll get much better flow.
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Unread postAuthor: lukemc » Thu Mar 29, 2007 5:50 pm

i cant really see what you did to the blow gun did you just sand it down so the diameter is smaller?
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Unread postAuthor: mopherman » Thu Mar 29, 2007 5:52 pm

how do you refove the phram? just yank it?
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Unread postAuthor: hi » Thu Mar 29, 2007 6:07 pm

mopherman wrote:how do you refove the phram? just yank it?


It a really complex process of unscrewing the top and ( make sure you dont loose the screws) taking it off.
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Unread postAuthor: noname » Thu Mar 29, 2007 6:09 pm

lukemc, use a fine file to file it down to about half the original width.
mopherman, where the solenoid was, there is a circle of rubber. Peel it up, then peull hard to get the diaphragm out.

I forgot to mention this:
To anyone who is using this mod, the first time I tried a valve like this, it leaked like hell out the sides. All you need is an O-ring to fit into the circular groove that the diaphragm's edge was set into.
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Unread postAuthor: mopherman » Thu Mar 29, 2007 6:15 pm

seems easy to rip it off
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Unread postAuthor: landoklr250 » Thu Mar 29, 2007 7:01 pm

I dont see how a modded blowgun can allow more airflow than a sprinkler valve. The opening on a blowgun isnt but like 1/4". you can get a 1" sprinkler valve and mod it.
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Unread postAuthor: noname » Thu Mar 29, 2007 7:04 pm

Read the original post again, but the whole thing this time.
I'd have to admit, I love it when noobs tell me stuff like this!
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Unread postAuthor: landoklr250 » Thu Mar 29, 2007 7:09 pm

Sry, im an idiot but computer didnt load everything. Now i see what u mean
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