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No Lathe Hammer Valve

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: VH_man » Tue Jun 03, 2008 4:31 pm

the sealing face..... the thing that gets hit.
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Unread postAuthor: MaxuS the 2nd » Thu Jun 05, 2008 1:26 am

The sealing face was a piece of innertube from a tire that had been cut into a small circle and then hole punched in the middle.
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Unread postAuthor: VH_man » Thu Jun 05, 2008 7:09 am

and i take it the solid part of the valve was a screw?

some internal pics would be very nice.........
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Unread postAuthor: MaxuS the 2nd » Thu Jun 05, 2008 10:10 am

I'm sorry, I don't understand what you mean.
Here is a picture I drew for spudfarm, it's easier than you think.

Image
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Unread postAuthor: VH_man » Thu Jun 05, 2008 12:53 pm

thank you that answers my question..........

i guess we had different names for it.
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Unread postAuthor: MaxuS the 2nd » Thu Jun 05, 2008 1:52 pm

I guess so yeah.

I'm exploring the possibilities of full auto with a hammer valve now.
My next one will bother be smaller and made with use of a lathe.
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Unread postAuthor: Brian the brain » Thu Jun 05, 2008 2:15 pm

Sear to hold back the hammer, a pneumatic ram powered form the barel side to recock it..that should work
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Unread postAuthor: microman171 » Thu Jun 05, 2008 2:16 pm

Im sorry for this question BUT, How does a hammer valve work? I see there is a piston that seals the barrel and you push a button and the valve opens. It this stem on the valve hard to push? Or is is called hammer valve for a reason?

This type of valve is an interesting prospect...
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Unread postAuthor: MaxuS the 2nd » Thu Jun 05, 2008 2:46 pm

Brian the brain wrote:Sear to hold back the hammer, a pneumatic ram powered form the barel side to recock it..that should work


I'll look into it :wink:

Im sorry for this question BUT, How does a hammer valve work? I see there is a piston that seals the barrel and you push a button and the valve opens. It this stem on the valve hard to push? Or is is called hammer valve for a reason?


Basically, when the stem (the blue rod in the diagram) is pushed, it pushes back the ball bearing which seals onto a rubber sealing face and a small amount of air is allowe through.
How hard the stem is to push depends on how much pressure you use and the strength of the spring. You don't particularly need a strong spring, just one that will reseat it after it opens.
It's called a hammer valve just because a spring loaded 'hammer' hits the stem and opens the valve momentarily.
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Unread postAuthor: sniper hero » Thu Jun 05, 2008 2:56 pm

but why not use a tube with a big gap and a closed end?
good work btw
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Unread postAuthor: MaxuS the 2nd » Thu Jun 05, 2008 3:00 pm

I'm not sure I understand what you mean, picture maybe?
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Unread postAuthor: microman171 » Fri Jun 06, 2008 12:00 am

Ahhhhhh Kewl :D I will look into these. When you have finished your no lathe one please post pics :D
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