you struck the gold mine.
these bellow valves are not for our application, CV look small but fairly large orifice. you can easily sell them for more than $50 each, and I think somewhere between $80-$120 each is proper.
Really? I've seen lots of people who have used them and reported great success.
[EDIT]: Just saw your needle valve post:
Swagelok Belows-sealed metering valve, Part number SS-4BMG, SS-4BMW(weld port)
Cv: 0.019 (at 6 turn full open)
(Tested, Orifice is too big, at low turn doesn't work well)
This makes me sad.. How does it not work well? Flow doesn't scale well? Flow irregular and requires adjustment? I was planning on using these to replace the valves on my builds because I really like the silver handle. It has the same orifice (lower cV) as the Swagelok M series which I'm using and like. Is it the combination of low cV and larger orifice?
Last edited by rdmustang1; 03-21-2014 at 02:15 PM.
Reason: more info