Re: ORGLIST: Overpressure valves

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From: Jacob Zabicky (zabicky$##$bgumail.bgu.ac.il)
Date: Sun Jan 20 2002 - 06:27:45 EST


Hello Michael,

You can use a non-return valve made of glass (Pyrex, Quickfit, etc.). They
are very simple and work fine, as long as you keep a slow stream of inert
gas flowing. If you need to work under pressure, the gas-supply companies
have non-return valves rated for all scales of pressure, and made of
corrosion-resistant alloys.

All the best,

Jacob

At 15:42 17/1/2, Michael Engel wrote:
>Hello,
>I am an organic chemist and, until some years ago, I used mercury valves as
>an overpressure valve when doing synthesis under an inert atmosphere.
>During the last years, I didn't have to use such overpressure valves.
>Now I am back and I want/have to to use some other types of valves.
>What do use in your country, are Hg valves still in use ?
>Thanks for any advice.
>Best wishes
>Michael Engel
>(Japan)
>
>
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Prof. Jacob Zabicky
Institutes for Applied Research
Ben-Gurion University of the Negev Private: POB 12366, Beer-Sheva 84863
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