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Adjustable pressure regulator for qualification
Posted: Thu Jan 31, 2013 8:05 am
by artsjeroen
For my HPLC pump qualification I am looking for a device like this:
It is about 2 cm / 0.8" in height (it looks really big in the picture
)
https://docs.google.com/file/d/0B57F_5o ... FIems/edit
It has to provide a pressure of 1000 PSI over my pump. But it has to be adjustable for other purposes, such as seal pack calibration.
I don't know the official name for this device, which makes it even harder to find.
Re: Adjustable pressure regulator for qualification
Posted: Thu Jan 31, 2013 8:57 am
by HPLCaddict
Backpressure-regulator?
E.g.
http://tinyurl.com/byxjkny
Re: Adjustable pressure regulator for qualification
Posted: Thu Jan 31, 2013 10:41 am
by scottythree
I use a union and a column end cap/nut (very adjustable and cheap).
Re: Adjustable pressure regulator for qualification
Posted: Thu Jan 31, 2013 11:33 am
by artsjeroen
For the seal pack calibration I do the union trick too. The supplier suggested me this method for the same reasons
But for the qualification I need to collect the "waste" so a T-shape valve is more practical. And if I have to buy me such valve, it is more price efficient if I can also use it for the seal packs.
Re: Adjustable pressure regulator for qualification
Posted: Thu Jan 31, 2013 3:30 pm
by lmh
Grace/Alltech used to do quite a reasonable one. I haven't looked if they still do.
Re: Adjustable pressure regulator for qualification
Posted: Mon Feb 04, 2013 9:00 am
by artsjeroen
Found the exact same as in the picture:
[url]http://www.swagelok.com/search/find_products_home.aspx?SEARCH=/search/Low-Flow+Metering+Valves,+Cv+up+to+0.004+(1000+psig+[68+bar])+/id-10002278/type-1&item=1acb7133-8c34-4ad2-b0c5-74ad982a58ce[/url]