Re: [PSUBS-MAILIST] Double O-Ring On A Hatch

That is Gary's sub. He lives in Michigan. I saw it last year. The hull is 1/2'' thick while the ends are 3/4'' thick. A nice job, but could use more windows. If someone wants a good ''K'' boat, that one is nice.

I don't see a problem with the double rings. Frank D.

-----Original Message-----
From: Cliff Redus <cliffordredus@sbcglobal.net>
To: personal_submersibles@psubs.org
Sent: Wed, 8 Aug 2007 10:39 pm
Subject: Re: [PSUBS-MAILIST] Double O-Ring On A Hatch

Brent,

I concur with Vance, Carsten and Peter ..., a single o-ring witht the correct hardness is the way to go. See technical note http://www.satoriseal.com/Technical/introduction_to_o-rings.htm on how o-ring is design to move within it's machined grove under pressure to seal. Hatch upper and lower faces need land face to face. If you are designing a hatch, pick a standard size so that you do not have to introduce a splice.

Cliff

Great works are performed not by strength but by perseverance.
Samuel Johnson

----- Original Message ----
From: Brent Hartwig <brenthartwig@hotmail.com>
To: PSUBSorg <personal_submersibles@psubs.org>
Sent: Tuesday, August 7, 2007 11:31:47 PM
Subject: [PSUBS-MAILIST] Double O-Ring On A Hatch

I finally found a double o-ring on a sub hatch. The sub on ebay right now called the Great Lake's Submarine mentioned earlier, has one. Here is the picture.

http://www.frappr.com/?a=viewphoto&id=4001713&pid=7375620

Regards,
Brent Hartwig