Pneumatic Gate Valve

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:

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

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

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

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

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

The tubes opening is 1/2".

"V8TR4" > candy product to fill plastic tubes. I want to make an automatic valve

I would try GlobalSpec

What does that mean?

You dont know what a pumpkin gun is?

Google is your friend.

Lots of fun!

Gunner

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Jason Walter wrote: : 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.

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.

1. 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.

2. The expense of developing a proper EPS Foam sabot for intact tomato delivery, at least intact till it arrives on target ...

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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