Qev ?

[the badman]

OK i have just seen a vid for a marker with qev installed what is a qev

[Big'n slo]

OK i have just seen a vid for a marker with qev installed what is a qev

Quick Exhaust Valve

Helps speed up the pneumatics.

[93civiccpe]

Big'n slo is correct, but I'll explain a little more in depth what happens for those who want to know. These are most commonly used on the ram of an autococker. Very simply a 3way sends air to one side of the ram to push the rod back and cock the bolt back so another ball feeds and also the sear catches, and then sends air to the opposite side of the ram to bring the bolt back forward pushing the paintball into the fire position and closing off the feed tube so another ball can't come down. Well, in this standard configuration, when the air switches from one side of the ram to another, the previously pressurized side of the ram has to exhaust it's pressure back through the 3 way hose and out the 3way.

With QEV's, the air is immediately exhausted through either end of the ram so it doesn't have to travel back through the little hose and out the 3-way. On ebladed/e-triggered autocockers this is a must to get insanely high rates of fire. On mechanical autocockers, it helps prevent shortstroking because of how fast the air exhausts. I had a picture showing how the standard airflow goes in the front pneumatics of a cocker but i can't seem to find it. If you have any more questions though, then please feel free to ask me.

[the badman]

thanks guy's

[SlartyBartFast]

to exhaust it's pressure back through the 3 way hose and out the 3way.

It's a 4-way dude.

And yes, I'm picking on you....

[93civiccpe]

It's a 4-way dude.

And yes, I'm picking on you....

my cocker has a shocktech bomb 3-way. I've heard arguements about whether or not they are 3-way versus 4-way. Some only have 2 orings inside, the higher end ones have 3 o-rings inside. You run the hoses to the ram backwards if you are running a 3-oring one like the Shocktech bomb 3-way which is what I own. They operate a little differently but the same concept. I know that's shocktech's name for it. Honestly I've never had the desire to debate whether or not to consider it a 3-way or for way, but on mech's I know they are commonly named 3-ways by most of the aftermarket companies. Also, i think it's considered a pneumatic 5-way that is used in the e-blade system. Honestly I am now trying to remember how they are classified. I do know that if you go to shocktech's website theirs is the "shocktech bomb 3-way", although I wouldn't be surprised if they mis-labeled it.

[SlartyBartFast]

my cocker has a shocktech bomb 3-way.

Nope. Nothing to do with number of O-rings.

It's all about the number of orifices. The 3-way/4-way confusion is that the paintball valves always forget to count the exhaust as a "way".

All piston control valves are 4-way/2-position valves.

[93civiccpe]

I just remember reading a posting where people discussed this a while back. Basically the piece that is commonly referred to as a 3-way has 1 input, 2 exit paths & 2 exhausts. I know that the 4 paths make it a 4-way, and i know that people have argued that air can only go 3 ways at a particular time during operation (air flowing in the input, out to one end of the ram, and the other end of the ram exhausting). Still, since there is a total of 4 paths out it is a 4-way and you are correct. I wasn't trying to debate it's operation, I was just calling the part by its commonly referred-to name. Otherwise a new player might be sitting in here saying "wait, my autococker has a 3-way, do I need to upgrade. Maybe that will fix all my timing problems..." .. LOL. Anyways, I do believe you are correct after sitting here for a few moments thinking about it. It's sad though that so many companies market them calling them 3-ways.