SpudFiles

This is my latest project. A 3/4 in. trigger valve that works with pressures up to 115 psi. Although the lines going everywhere on the diagram are confusing, the valve is quite simple. You simply pull the bolt back to fire it. The picture explains everything, except one thing. The side with the male adaptor is the side that screws onto the chamber. The top inlet is what goes out to the chamber. I have built the valve and tested it at 70 psi leak free. It works quite well. I built it for about $10 U.S. I found all the parts at my local Lowes. Suggestions are appreciated. Pictures will be up soon. ( Can't find my camera, lol) Be as harsh on the design as you want, but keep in mind that this is my first valve I've ever made, and it is only a prototype.

doesn't look like it has a decent variety of operating presure
too low then it will be hard to activate,
too high and it will open like a pop relif valve only slower

the use of a sealing face is a bad idea, a oring plug will be much more promising, I recomend a lighter spring and a trigger realese holding that tab down, and a plug insert

What are you refering to as a tab, and what do you mean by a "plug". Also on the real valve, ( Not the prototype) I'm going to use both a sealing face, and an O-ring insert combined, so it will seal better. Here is a pic of the new design. This time though, it is going to be a threaded 3/8 copper bushing (That is meant for use with bolts), that will thread onto the bolt, and is smooth on the outside. I will line the outside with an o-ring and glue a couple more o-rings on the smaller part of the bushing to fit snugly into 1/2 in. pipe. Sound good?

by tab I ment the end of the bolt that you pull on

I just realized HAHA thats The MTV acuator morris trigger valve

What's keeping the pilot's air pressure from pushing it out and causing a misfire?

i dont really understand it but i haven't looked at it long enough. ( sometimes it takes me a while to figure out things like this).

The spring is pushing on the rubber part hard enough to make a seal. Also, I'm goig to lowes today to get stuff for the final prototype.

It looks like a pretty cool design, and I think it could be easily worked on to be even better, which is a cool thing. I cant wait to see it in action too.

its a homemade pop relif valve I don't think it's an ideal for fast dumping thats going to have a limited presure operation, but supose you use that in a semi that could be a benift since once it reaches a decent presure the trigger pull will be lighter making it easier to rapidly pull at the right presure but still its the same as a pop relif valve

I just finished the final prototype with an o-ring plug, and rubber washer seal. After I finish the complete version ( maybe this week) I will post pictures.

you should see how well this valve performs versus a modded sprinkler valve or a piston. I like your design alot.