SpudFiles

I'm going to dive right into this with no back story about how i figured it out, so here i go...

when you consider a normal barrel sealing sprinkler valve, technically what you have is a piston attached to a diaphragm. this diaphragm is air tight so an equalization hole is necessary in order it air to get into the chamber, but what if we plugged this one and drilled a new EQ hole through the center of the piston?
the positions of the chamber and the barrel would be switched! So this idea could also be implemented in a homemade piston, all you need is a diaphragm clamped in a union the flexes with piston or just an EQ hole leading into the barrel, and there you have it... chamber sealing piston valve with no o- rings!

Whadda ya'll think? will it work, will it be effecient, most importantly though, am i the first to come up with this ?

Or even simpler is to buy a valve of that configuration. They are the ones with the electric solenoid in the center of the diaphragm instead of the side.

i am aware that there are chamber sealing SVs, but the SV idea was just to get my point across in a way most pneumatic builders could visualize.

the chamber sealing sprinkler valves are the ones with the guide rod.

this isn't exactly a new idea, people have though of it before but there's not many situations where it's practical. here's a situation where there was a decent reason to attempt a chamber sealing diaphragm, however as you can see, obtaining the right diaphragm thickness and seals properly is quite challenging