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RatFink 11-23-2011 10:21 PM

Cartridge valve modifying
I am looking at the cartridge valve I'm going to use for my new project and the valve pin hangs out of the body, basically 3/8 of an inch and only strokes about an 1/8th, so in the interest of keeping things as compact as possible, I am thinking of taking a good 3/16 of an inch off the valve stem.
Does anyone have a good reason not to? I always hate cutting first and figuring out it's not going to work as I had envisioned second...
Just to clear up the semi-obvious, no, this is not going in a factory body.

MaD 11-23-2011 10:39 PM

I don't see why not, just keep it long enough so the hammer isn't slapping the valve body.

the_chemist 11-24-2011 12:02 AM

I would press the pin in until it can't go in anymore and see how much still protrudes, I have taken about 1/16 off with no issues. Also make sure you round the corners or it will balloon out from the hammer hitting it and you can't remove the valve stem.

RatFink 11-24-2011 11:58 AM

Thank you gentlemen.

Chaz 11-24-2011 12:01 PM

Are there any advantages to doing this in a stock gun (Say a Cart-PGP)?

RatFink 11-24-2011 12:36 PM

I wouldn't think so, unless you were trying to accomplish something special with the spring length, or hammer size. I just have the luxury of being able to basically move the barrel and the valve back on the lower tube. I know 3/16 isn't much, but why make things bigger than they need to be?

SockMonkey 11-24-2011 10:03 PM

wouldnt you have longer hammer travel? Possible higher velocity?

RatFink 11-24-2011 10:55 PM

I would imagine in a factory body, yes something like that may be the case. I may not be able to do anything with it anyway as it seems the pringle bolt may be in the way.

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