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Feasible as BHV

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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Feasible as BHV

Unread postAuthor: AlphaOmega » Fri Jul 09, 2010 12:13 pm

I was wondering if this design would be feasible as a BHV (Balanced Hammer Valve). All thoughts, questions, and suggestions are openly welcomed. I addressed this in a previous post but I would like to consider myself slightly more knowledgeable at this time.

This was my first attempt at a diagram on paint so take it easy.



-Alpha
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Unread postAuthor: Slauma » Fri Jul 09, 2010 12:18 pm

This is basically the design used in most blowguns I believe.
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Last edited by Slauma on Fri Jul 09, 2010 9:16 pm, edited 1 time in total.

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Unread postAuthor: spudtyrrant » Fri Jul 09, 2010 12:31 pm

Slauma wrote:This is basically the design used in most blowguns use I believe.
you believe correctly :wink:
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Unread postAuthor: Gun Freak » Fri Jul 09, 2010 12:44 pm

Yeah just buy a blowgun and whack it with a hammer, and shizam, hammer valve :wink:
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Unread postAuthor: AlphaOmega » Fri Jul 09, 2010 2:10 pm

So then this valve is balanced. Huh seems like more people would scale this up and use it. So am I right in assuming it the configuration I presented I would only be fighting the force of the spring to open the valve being balanced. Then the same spring force closes the valve when whatever being used to open it is no longer applying force to the valve stem. Has anyone used this as a main valve for a airsoft gun. Seems like it could be ideal for low or high pressure of course factoring in working pressure of the materials used for construction and the such.

Lemme know this may be my first endeavor at doing more than lurking and the occasional post.
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Unread postAuthor: jackssmirkingrevenge » Fri Jul 09, 2010 2:13 pm

Gun Freak wrote:Yeah just buy a blowgun and whack it with a hammer, and shizam, hammer valve :wink:


I'vebleating about that for ages :roll:
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Unread postAuthor: Gun Freak » Fri Jul 09, 2010 4:45 pm

Yes Jack I know, I just had to say it though :D
Such a valve would have terrible performace, probably even with airsoft calliber, unless the pressure is insane. BTW anything over 200 psi is insane to me 8)
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Unread postAuthor: clemsonguy1125 » Fri Jul 09, 2010 4:46 pm

Antonio tried it and had poor performance
Edit-Here is the link
http://www.spudfiles.com/forums/viewtopic.php?t=12713&
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Unread postAuthor: jackssmirkingrevenge » Fri Jul 09, 2010 11:43 pm

clemsonguy1125 wrote:Antonio tried it and had poor performance


... but with a short barrel and low pressure as he was using, this was to be expected. Most commercial pneumatics with hammer valves operate at 200 bar, not 8 bar ;)

edit: 12,000th post :shock:
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Unread postAuthor: clemsonguy1125 » Sat Jul 10, 2010 12:00 am

Nut most members don't have access to 200 bar, I don't even have access to 200 psi until I order my shocky
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 10, 2010 12:15 am

There are other avenues to add power - modding the blowgun for higher flow, using a stronger hammer etc.
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other cofiguration

Unread postAuthor: jean » Sat Jul 10, 2010 6:31 am

hi here an other config for a balanced hammer valve.
i show in this
http://www.spudfiles.com/forums/piston- ... 17684.html
thread an pic of it

by jean
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