I could still adjust it with a delivery pressure of 5 PSI.
That's probably the difference. I can't get much lower than 10psi with the regulator I'm using.
Those things come from the factory so that when closed, it's not really closed. You'll need to take the handle off and reset the zero point to what ever you want. Know that it's easy to break the needle off if you close the valve completely.
You're right, they're not designed to completely close. I didn't know they could be modified though! I didn't see how to do it from the diagram on the Swagelok site, how do you get it apart?
edit: Do I loosen the top set screw, unscrew the handle slightly, then retighten the set screw? That would put the handle slightly higher up on the stem.
Last edited by DeadlyMuffin; 12-31-2012 at 01:42 AM.
Reason: I looked at the diagram