Re: [PSUBS-MAILIST] O ring groves

["kocpnt tds.net" <kocpnt@tds.net>]

Hi all,

 

I agree with all said. I used a dovetail in the top hatch land with the beveled side out.

 

Because of the size of the ring, I get much better results with a softer O-ring material.

 

Best Regards,

 

Jim K

On Tue, Aug 17, 2010 at 8:21 AM, Dan H. <Jumachine@comcast.net> wrote:

Alan,

 

Go with the K-350 350 dove tail design.  There is nothing wrong with having an O-ring snap into the dove tail grove to hold it in place.  As far as the amount of squeeze, refer to an O-ring manual to be sure the K design is what is recommended for the ring your using. 

 

Dan H

----- Original Message -----

From: Alan James

To: personal_submersibles@psubs.org

Sent: Tuesday, August 17, 2010 4:29 AM

Subject: [PSUBS-MAILIST] O ring groves

Hi submarine experts,

I'm looking at hatch O rings & groves.

I see that on the K250 hatch plan the o ring grove is dovetailed on the inner edge.

Is this done on the K350?

I think I can remember hearing advice to buy an O ring slightly smaller than the

grove diameter so that it is held up against this dove tailed edge. I've been reading

that the dove tail grove is not recommended & that the O ring should start off central in the grove.

Also I've seen some hatches with the O ring grove in the lower (conning tower)

side hatch face.

Has anybody got any thoughts / words of wisdom on this thanks.

Regards Alan