I take it that this valve is pull to open except you've put a spring behind the knob to hold it in the open position??? what psi are you running it at?? Ive now made my barrel. I used 2 pieces of hydraulic tube rated at over 600psi sleeved inside each other with blow forward bolt built in and my QEV...

I was intending on running around 300 psi
if I run the valve at those levels will it loose reliability or shorten its lifespan?
I am willing to pay more for a higher rated valve i just cant find any

Yep I saw that I was of the same thought as you though. If possible I would rather use off the shelf item.
but this is not my biggest concern.
My biggest concern remains the relatively low pressure rating of these valves.

well that sucks they were looking good

damn it they looked so promising

Yep thats exactly how I thought it worked. jackssmirkingrevenge you put up a link to this valve http://www.ebay.com/itm/1-8-PT-Female-Thread-Two-Position-Three-Way-Flow-Control-Pneumatic-Gas-Valve-/310575456187?pt=Pneumatic_Hydraulic_Valves_Parts&hash=item484fbd5fbb This is a lot more compact than t...

here is the vid I was following [youtube]http://youtu.be/RKpeHUsa5vw[/youtube] I was thinking a 3 way valve but I though normally open and normally closed didn't particularly matter with a 3 way valve as you can just switch which port you use for exhaust and charge???? Maybe I don't understand how t...

hey all Im new here and have what is probably a very noob question. I have been designing a semi auto based on a video I found on you tube by wyz the design integrates a blow forward bolt into a sleeved barrel and uses a qev to discharge air= down the barrel now I dont want to use a slide valve as I...