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Are "jar top" sprinkler valves modable?

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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Unread postAuthor: dongfang » Sat Mar 01, 2008 4:38 pm

Hi,

I have modified a RainBird JT-101-something. Worked great, until I screwed it on too tightly and broke the valve body.

Just remove the regulator screw if there is one, and screw and glue in a 1/4" male to 1/8" male or female reducer instead.

It works more reliably if you retain the spring.

Regards
Soren
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Unread postAuthor: tomthebomb137 » Sun Mar 02, 2008 9:27 am

wait so dongfag when you say regulator screw , you mean the bleed screw, as the GGDT calls it? if possible could you rephrase that using the terms provided on the GGDT?
http://www.thehalls-in-bfe.com/GGDT/library/valve_orbit1_mod.html

Thanks so much for your help
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Unread postAuthor: dongfang » Mon Mar 03, 2008 11:29 am

Hi,

I mean the "flow control" screw marked in red on one picture.

If your valve does not have that (like on the other picture), you will have to attach your trigger somewhere else. I would try with the bleed screw, and NOT drill through the center of the jar-top. It seems that would weaken it quite a lot.

Regards
Soren
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Attachments
JTVF-AVB.jpg
A JT ´Bird with a flow regulator (in red), and some other stuff on the left hand side.
JTVF-AVB.jpg (5.08 KiB) Viewed 217 times
W00000.jpg
A JT ´Bird without a flow regulator.
W00000.jpg (1.38 KiB) Viewed 217 times
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Unread postAuthor: tomthebomb137 » Mon Mar 03, 2008 3:34 pm

ooo alright now i understand, thanks so much
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"Once the pin is pulled, Mr. grenade is no longer our friend"

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