Sprinkler Valve Problem

[wowaguy]

Hi guys!

I'm making a cannon that has an electrically activated sprinkler gun that has a ball valve in the back.

The problem is, whenever I open the ball valve to fill the intermediate chamber, air bursts out of the sprinkler valve! I'm only pressurizing it up to ~30psi, and the air is still coming out. Am I doing something wrong? I've checked all my connections and there's no problem there.

Thanks!

[jrrdw]

Are the arrows on the valve pointed to the barrel? Some pictures of your setup would help...

[Gun Freak]

You need to take the valve apart and remove the plastic part that stops air from equalizing in the diaphragm. Pictures will help.