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sprinkler valve equalization

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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sprinkler valve equalization

Unread postAuthor: Howzer » Thu May 27, 2010 4:45 pm

my 3/4" orbit sprinkler valve honks when i'm filling it, should i remove this white plastic filter-like thing from the existing equalization hole?

sorry for no pics, and i would have done a search, but my neighbors internet is really slow today XD
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Unread postAuthor: irisher » Thu May 27, 2010 5:15 pm

Is it modded? Message to short
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Unread postAuthor: Howzer » Thu May 27, 2010 5:22 pm

yeah, sorry.

epoxied the solenoid hole and tapped a hole in the center for a blowgun, couldn't find any leaks.

anyone ever seen one of these? it's like a little white tab with a pointed stud through the equalization hole holding it on to the diaphraghm. on closer inspection it's hollow, the tab part is made up like a two tiny screens and there is a hole in the stud flowing through to the pilot chamber

my guess is it keeps air bubbles from catching the equalization hole in normal sprinkler use
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Unread postAuthor: Gun Freak » Thu May 27, 2010 5:30 pm

I have that in mine too, and it honks when filling rapidly, but when using like a bike pump it doesn't. I didn't try taking mine out ot anything, worrying that it might mess up the phragm. Maybe you could make your own phragm or mod it into a piston valve?
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Unread postAuthor: Howzer » Thu May 27, 2010 5:36 pm

hmmm... tough decision

i think this piece is why it is honking though, it really slims the equalization hole down to like a needle...

plus i made this launcher intending to use 12g co2...

i'll try filling it with my bike pump, but i think i'm gonna go ahead and take it out
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Unread postAuthor: Gun Freak » Thu May 27, 2010 5:46 pm

Be careful taking it out, it could screw up the whole phragm.
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Unread postAuthor: Lockednloaded » Thu May 27, 2010 6:35 pm

take it out. It limits how fast you can fill. I know for a fact that it will not damage the diaphragm
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Unread postAuthor: Gun Freak » Thu May 27, 2010 8:03 pm

Oh cool. I might do that next time mine is open, if ever.
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Unread postAuthor: clemsonguy1125 » Thu May 27, 2010 8:11 pm

Yeah, that one of the reasons Im not a huge fan of sprinkler valves, a 2 inch piston valve can be made for the same price and is easy to fix, If you dont want to remove it completly you could drill a larger hole
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Unread postAuthor: deathbyDWV » Thu May 27, 2010 8:40 pm

Yeah I take those out on all of mine and leave the spring in... Once you take it out it should have enough flow to not honk...
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Unread postAuthor: Howzer » Tue Jun 01, 2010 11:57 am

well, i ended up leaving it in and moved the fill valve to a tee before the blow gun and the launcher works "great" now(i'm sure there's room for improvement). I used it this weekend at an airsoft event to launch foam rockets at an "enemy APC". Worked out pretty well, i was one of the few people there with a launcher and we managed to capture the enemy APC twice after i disabled it. I'll probably put some pictures up in the showcase soon, hopefully the people taking video/pics at the event caught me on camera in action.
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