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Multi purpose 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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Multi purpose valve

Unread postAuthor: MRR » Sun Oct 11, 2009 1:55 pm

I don't think that this is entirely new but I'd like to give it a shot....

The idea for this valve came when I used one of these at work...
It's a polyurethane foam gun.
Image

A quick sketch of the basic idea.
Image

In contrast to traditional hammer valves, this valve is pulled to be opened. Similar to BtB's high pressure valve you only need to overcome the force of the spring at any given pressure.
It also acts like a check valve if you decide to pressurize into the release hole.

Today I took the time to build it with the parts I had laying around.
This is just a basic setup that I hooked up directly to the compressor.
Image

View of the internal parts.
Image

The o-ring grooves took a little time because I made them on a poor mans lathe (aka drill press :) ). I had to grind the head of the screw and the nut a little down to fit into the 1/4" tee.
Image

Further ideas for this valve:
-The valve has a great flow and would make a good pilot.
-Increasing surface of the "sliding" part of the bolt to go semi/auto.
-Building a BBMG.
-I always wanted to build a hardcore 300psi water gun :twisted:
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Unread postAuthor: psycix » Mon Oct 12, 2009 6:02 am

That's one neatly built pushbutton valve. Nice job!
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Unread postAuthor: MRR » Mon Oct 12, 2009 9:18 am

Actually it's a "pull open" valve with full 7.5mm flow.

Works excellent on high pressure.
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Unread postAuthor: jackssmirkingrevenge » Mon Oct 12, 2009 11:31 am

This is what I saw from what you wrote:

MRR wrote:Building a BBMG_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _full 7.5mm flow_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Works excellent on high pressure.


:D :D :D
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Unread postAuthor: MRR » Mon Oct 12, 2009 12:07 pm

Yea a BBMG would work great with this valve.

The point of the valve is that you can open and close it with little force at high pressure.
The opening time might not be as fast as a piston valve but it sure has potential as a secondary valve like a pilot or filling valve.
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Unread postAuthor: psycix » Mon Oct 12, 2009 12:58 pm

Pullbutton valve then. :)

Would make a neat pilot.
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