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update(core pictures)BTB pushbutton valve

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: far_cry » Sat Jul 18, 2009 10:34 am

yes i did machine those pieces my self


inonickname wrote:
twizi wrote: is it hard to trigger at 700 psi


Seen as it's balanced, I'll guess not. Seriously man, it's been said at least twice in this thread that the only force to counter is the spring...

Very good work far cry


really its not balanced ,the area where the O ring attached to the part is alittle bigger (0.5 mm aproxmilaty) . and i didn't use a spring at all

i prefer the button to be a little bit hard to push (safety issue).

over all at 700 psi this trigger is absolutely fabulous
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Unread postAuthor: inonickname » Sat Jul 18, 2009 10:43 am

If you can open it at 700 psi with out a lever/fulcrum then I'd call it easy to open.

Any idea how much flow you get? Would no doubt be massive
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Unread postAuthor: far_cry » Sat Jul 18, 2009 11:07 am

inonickname wrote:If you can open it at 700 psi with out a lever/fulcrum then I'd call it easy to open.

Any idea how much flow you get? Would no doubt be massive


i cant tell you exactly ,but i can sure you that he make all of the 1/4" BV's and all of the blow guns commit suicide (because the shame)

and i can use it is a piston valve for sure . think about it, no pilot system less work
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Unread postAuthor: POLAND_SPUD » Sat Jul 18, 2009 11:39 am

think about it, no pilot system less work

hmm good idea
have you tested how well it performs as the main valve??
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Unread postAuthor: far_cry » Sun Jul 19, 2009 7:02 am

no i did not , i think i will do that when i get the time

the main problem is ,if you notice the pilot side you will see that i cant attach any thing . maybe i will machine other part with deferent shape
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Unread postAuthor: boyntonstu » Sun Jul 19, 2009 7:51 am

inonickname wrote:If you can open it at 700 psi with out a lever/fulcrum then I'd call it easy to open.

Any idea how much flow you get? Would no doubt be massive


I am also curious about the flow because the seal diameter seems wider than the val ve body and the air has to pass the restriction.

IOW How does a barrel get mounted to the valve?
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Unread postAuthor: far_cry » Sun Jul 19, 2009 8:13 am

this forum is nuts

doable topic it self
delete plz
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Last edited by far_cry on Sun Jul 19, 2009 8:18 am, edited 1 time in total.
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Unread postAuthor: far_cry » Sun Jul 19, 2009 8:16 am

I am also curious about the flow because the seal diameter seems wider than the val ve body and the air has to pass the restriction.

IOW How does a barrel get mounted to the valve?


seal diameter seems wider than the val ve body


that's a washer to prevent the O ring from flying of


will ,this valve working right now is a pilot valve. if you read the topic from the beginng you will notice that

and yes , if you was asking if this valve can replace the piston valve ,but i must change some parts to do that .
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Unread postAuthor: boyntonstu » Sun Jul 19, 2009 9:04 am

far_cry wrote:
I am also curious about the flow because the seal diameter seems wider than the val ve body and the air has to pass the restriction.

IOW How does a barrel get mounted to the valve?


seal diameter seems wider than the val ve body


that's a washer to prevent the O ring from flying of


will ,this valve working right now is a pilot valve. if you read the topic from the beginng you will notice that

and yes , if you was asking if this valve can replace the piston valve ,but i must change some parts to do that .


Sorry, Pilot error!

I would like to see this design as the main valve.

It would simplify everything.

It seems like overkill for a pilot valve if a piston valve is designed to be sensitive.

Look at what 10 psi, a sensitive piston, and this tiny 50 cent 'PBV' does.

http://www.youtube.com/watch?v=hBaNXMJHIV8

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