Re: [PSUBS-MAILIST] gluing O-ring into grove?

[Bob Duncan <katsurencho@yahoo.com>]

Ship hatches i've had experience with have lips that hold in the seals, and sometimes you may be able to tap the lips a little tighter. There are adheasives on the market that should work. You shouldn't have a problem with gasses comming off of them in a 1 ATM submarine (the concern would be the increased partial pressure of a deadly gas). If i couldn't get a seal to fit the lips properly, i might be inclined to use double back tape.

  Silicone is used to keep the seal soft and flexible. They get hard with age and don't seal so well or break.

 

  Is that like a "Zebra" hatch, or a "Whiskey" hatch!!!?

 

 bob

Mark Steed <plutomark@mail.astate.edu> wrote:

William: I have had similar experience. What worked for me was really putting the heavy clear silcone grease( not glue!) all over the offending ring and groove. This worked on a nylon flange very similar to a swimming pool filter cover. Also about the same 2 foot diameter. Pressure was in the 50psi range. Seemed that "dry" spots on the o-ring allowed for it to pop out. Good luck and best regards- Mark

Mark E. Steed
Arkansas State University Museum
110 Cooley Drive,PO Box#490
State University, AR 72467-0490
USA
Tel#(870)972-2074 Fax#(870)972-2793
Email: plutomark@mail.astate.edu



---------- Original Message ----------------------------------
From: William Alford
Reply-To: personal_submersibles@psubs.org
Date: Mon, 12 Jan 2004 14:38:36 -0600

>I'm doing some pressure checks on a door seal mechanism. A large dia. o-ring
>fits into a groove around the door entrance. It has been machined to correct
>oring specs, but will not stay in the groove when door opens. I've not seen any
>recommendations that o-rings may be glued in the groove since they are supposed
>to be somewhat movable to seal against the groove/door junction. But since
>these movements are quite small (mm), does anyone have experience with using a
>flexible gasket material/glue to hold the o-ring into place?
>William Alford
>

Two guiding principles govern Israel Naval Commando doctrine:

1.Every defense system is vulnerable.

2.The enemy can deal with weapons and operational methods that are known; for that reason, naval commandos use imagination, daring and initiative, to create situations which cannot be anticipated.

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