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Nupro Needle Valves
> From: "Frank I. Reiter" <FIR at istar_ca>
> I picked up a couple of these for my two tanks recently. I noted in the
> paperwork that these valves are designed not to close completely, so I
> added a couple shutoff valves as well strictly for ON/OFF control.
> I discovered, to my dismay, that the fully closed position on the Nupro
> valves yield to many bubble per second to count at 10 psi, and I have had
> to resort to playing (tediously) with the (rather course) shutoff valves to
> get it down to a couple bubbles per second.
When I first bought mine, I had a similar experience. But it turns out
you can adjust the "fully closed" by moving the knob. loosen it with a
hex key, and move it further up, and you'll be able to tighten it much
IMHO, the nupro valve is actually a little bit of an overkill for this
application. You get MUCH finer control than you need. The $13 NO1 (from
ARO; yes it is still being made!) does the job quite reasonably as well.
Erik D. Olson amazingly, at home
eriko at wrq_com