Pneumatic Gate Valve

In article <JC8Rb.17739$YG.957636
@twister.southeast.rr.com>, jwalter@ec.rr.com says...

You're likely to have problems with a gate valve and a
granular product. "Pinch valves" are commonly used for this
type of service. An example here:

http://www.redvalve.com/products/air/TypeR.html

Ned Simmons

Ned Simmons wrote:

Oh, that's cool!  Why didn't I think of that?  You have any idea of what
they sell for?  Bob

     I am continually amazed at the breadth of knowledge displayed on this
group.  I was just reading the original post imagining the powdered candy
running through some type of a hose with a way to pinch it off, and here Ned
gives us a link to the exact part!

Vaughn

Hi Jason,

Typically gate valves are used in fluids, whether it be air or an actual
liquid.
What diameter is the valve you are looking at?

Oliver

The tubes opening is 1/2".

    --Woo hoo! It's a punkin gun waiting to happen! :-)

--
        "Steamboat Ed" Haas         :  "The Faceless Conglomerate    
        Hacking the Trailing Edge!  :  you can trust...
                   http://www.nmpproducts.com/intro.htm
                   ---Decks a-wash in a sea of words---

What does that mean?

wrote:


Google is your friend.  <G>

Lots of fun!

Gunner


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wrote:

I have a 2" butterfly valve, air-operated with a 120V solenoid pilot
that I've been saving for just that occasion.  ;-)

  I'd go for smaller barrel diameters, for stuff like tomatoes,
potatoes or tennis balls.  Use a golf ball sized barrel for AP.  Gee,
does anyone make oversized paintball rounds?

Problems Are:
1. I don't have any old 25-gallon+ tanks to use for the receiver.

2. I don't trust my welding skills enough to put a pipe stub and bolt
flange on the end-shell of a tank, and then pressurize it to 125 PSI -
at least, not with people standing within 1/4 mile.

3.  The expense of developing a proper EPS Foam sabot for intact
tomato delivery, at least intact till it arrives on target <splat!>...

     --<< Bruce >>--
--
Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop
Electrician for Westend Electric - CA726700
5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545
Spamtrapped address:  Remove the python and the invalid, and use a net.

Oh...Punkin Chunkin...I saw that on discovery channel and the Myth Busters.
Cool stuff.
I didn't make the connection because I'm looking for something with only
1/2" diameter.

Jason

: What does that mean?
    --It's the hardest part to obtain and the most critical bit of
tech needed to build a successful gun. Heh.


--
        "Steamboat Ed" Haas         :  Why does it take so long to    
        Hacking the Trailing Edge!  :  see the blindingly obvious?
                   http://www.nmpproducts.com/intro.htm
                   ---Decks a-wash in a sea of words---

For what it is worth, Milnor commercial washing machines had a drain valve
that may work for you, at least the idea.
They used a piece of thin tubing much like inner tube, that was pinched of
by a solenoid. The solenoid was connected to a couple of flat bars on either
side of the tube. To stop the flow the two bars squeezed togather, pinching
the tube closed.
Greg

I would try GlobalSpec
http://www.globalspec.com

They have learn more pages on all types of valves and other components
Very deep technical content for users to view and its free