Mailing List Archive

Mailing List: techdiver

Message Display

To: bazza@sy*.di*.oz*.au*
To: techdiver@opal.com
To: Kevin
To: Gurr
To: -
To: Cis-Lunar <100044.3401@co*.co*>
Subject: Re: O Rings and using O2 mix
From: "Andrew Cohen" <Andrew_Cohen@cc*.ss*.nm*.go*>
Date: Tue, 28 Feb 95 11:58:44 EST

     Check out Marks' Standard Handbook for Mechanical Engineers, Ninth 
     edition pages 11-129-30.  Also see Swagelok Co. Technical Bulletin #5

Andy Cohen
______________________________ Reply Separator _________________________________
Subject: O Rings and using O2 mix
Author:  Kevin Gurr - Cis-Lunar <100044.3401@co*.co*> at ~INTERNET
Date:    95/02/28 4:18


Received: by ccmail from cheviot.terra.net 
From owner-techdiver@opal.com
X-Envelope-From: owner-techdiver@opal.com
Received: from fulton.opal.com (daemon@fu*.op*.co* [198.3.124.1]) 
    by cheviot.terra.net (8.6.9/jr2.10) with ESMTP 
    id EAA31685; Tue, 28 Feb 1995 04:24:27 -0500
Received: from localhost (daemon@lo*) 
    by fulton.opal.com (8.6.4/jr2.9)
    id EAA10963; Tue, 28 Feb 1995 04:21:32 -0500
Precedence: bulk
Errors-To: owner-techdiver@opal.com
Received: from dub-img-3.compuserve.com ([198.4.9.3]) 
    by fulton.opal.com (8.6.4/jr2.9) with ESMTP 
    id EAA10944; Tue, 28 Feb 1995 04:21:27 -0500
Received: by dub-img-3.compuserve.com (8.6.9/5.941228sam)
    id EAA02424; Tue, 28 Feb 1995 04:20:00 -0500
Date: 28 Feb 95 04:18:23 EST
From: Kevin Gurr - Cis-Lunar <100044.3401@co*.co*>
To: Barry Hallett <bazza@sy*.di*.oz*.au*>, owner <techdiver@opal.com> 
Subject: O Rings and using O2 mix
Message-ID: <950228091823_100044.3401_EHK59-3@Co*.CO*>

Barry,

The main concern appears to be O ring ageing. O2 seems to make Nitrile etc. 
crack faster.

Your are right about using "normal" ones. Dowty, Dupont and others have a 
compatability list for rings which includes those found in our SCUBA regs. It 
appears to be the manufacturers that are paranoid about them and exploding O2. I
am trying to get together an article based on the data I have from ring the 
manufacturers, NASA and ASTM to put this myth to bed. Can anyone out there get 
me chemical content data on any O ring they use with cylinder necks or 
regulators. I need; use, chemical content and manufacturters product listed.

KTF


Kevin

--
Send mail for the `techdiver' mailing list to `techdiver@opal.com'. 
Send subscription/archive requests to `techdiver-request@opal.com'.

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]