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| sandman |
 Posted: 06/17/2008 12:18 PM Post subject: |
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Colonel
Joined: 15 Mar 2007
Posts: 650
890.79 Spud Bux
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| actually if you are going to use a pump i would put a ball valve behind the sprinkler, so that u ca get enough pressure in the chamber to seat the valve, otherwise the sprinkler will never close, unless you have a small chamber |
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| neeewwww |
| Posted: 06/17/2008 12:24 PM Post subject: |
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Private First Class
Joined: 13 May 2008
Posts: 29
103.25 Spud Bux
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So... Barrel -> Sprinkler -> ball valve -> chamber -> schrader valve
Close Ball valve, fill the chamber, open ball valve... Fire.
Oh... thanks a lot...
Back to the designs... An materials list. |
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| sandman |
| Posted: 06/17/2008 12:28 PM Post subject: |
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Colonel
Joined: 15 Mar 2007
Posts: 650
890.79 Spud Bux
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| i think this would give you the best results, but this is just how i would address that problem, others may have better ways |
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| MalcomFrost |
| Posted: 06/18/2008 20:26 PM Post subject: |
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Private
Joined: 18 Jun 2008
Posts: 14
50.59 Spud Bux
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Just built my first pneumatic cannon, but my sprinkler valve honks. Actually it's really loud, like an air horn. I'm using a RainBird valve with 3/4" fittings, I kept the solenoid on which I activate using a couple of 9V batteries and a momentary switch/button. I've heard you can mod those valves to fix this problem, but I'd rather not use a blower, since I've put some effort into the electric trigger system. Any ideas?
-EDIT-
Nevermind, looks like I'll just have to mod the valve. Doesn't seem to be any way around it. |
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| DinerKid |
| Posted: 09/07/2008 6:17 AM Post subject: |
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Private
Joined: 29 Aug 2008
Posts: 5
22.26 Spud Bux
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| well i have a question i modded a watermaster and the way my sisign works i have a steady stream of pressurized air (55 psi) into a fairly small tank (15 inches of 2 inch sch 40) but my valve honks. it is inportant that i not add a ball valve because my rythem would be pull the bolt to load amo then fire. |
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| Grandtheftyourwife |
| Posted: 09/24/2008 20:57 PM Post subject: |
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Private
Joined: 17 Sep 2008
Posts: 10
30.30 Spud Bux
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| ok well here is an issue ive been having i filled the diaphram with epoxy and super glue and everytime i hit about 50 PSI the glue Pops and all preasue is gone . So i put a 1 1/2 in cap over the diaphram after filling it with superglue and gorilla glued the cap on as well as put a clamp over the cap to hold in from blowing off . Seems kinda strange that a 3'' pvc pipe thats 18'' long cant hold more than 50 psi before bursting. |
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| brplatz |
| Posted: 09/24/2008 21:49 PM Post subject: |
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2nd Lieutenant
Joined: 20 Mar 2008
Posts: 204
99.57 Spud Bux
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| what the hell are you doing filling you diaphragm with epoxy? that would keep the sprinkler valve closed?!?1 |
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| Carlman |
| Posted: 09/25/2008 4:24 AM Post subject: |
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The Aussie
Joined: 24 Nov 2007
Posts: 1170
375.30 Spud Bux
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| i hav just purchased a 1" rain bird with guide rod for an electric fire purpose gu..only problem is air leaks through.this is unmodified totally, air leaks through the tube that goes to outlet from solenoid thus allowing air to pass under diagrpagm a small bit, any ideas? |
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