[PSUBS-MAILIST] O-ring Question

[Alan James via Personal_Submersibles]

Another way of looking at it is, if you have a groove in a cylinder & have a 2% stretch on the O-ring, it pulls the O-ringin to the base of the groove. Whereas if you have a 2%stretch on an o-ring in a bore grove it will pull the o-ringaway from the base of the groove but on to the piston.So not sure which way to go here.Alan

      From: Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Monday, February 6, 2017 2:39 PM
 Subject: Re: [PSUBS-MAILIST] O-ring Question
   
Alan, do you have a copy of the Parker O-ring handbook? Best free resource out there for designing O-ring seals. ORD5700.pdf  Download it from the Parker website.Sean


On February 5, 2017 6:32:51 PM MST, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 Hi,am having trouble Googling an answer to this question.   I have an O-ring groove in the bore of my light housing, sealingbetween the bore & the side of my acrylic lens as per attached diagram.On a piston O-ring groove it calls for an optimal 2% stretch & not more than 5%.I can't find any reference to what stretch if any should be, if any, for an o-ringin a bore groove. I did see that in a! rotaryapplication they don't advice thattheir should be any pressure on the rotating rod.Should I be designing so that the o-ring will have a 2% stretch around the lens?Thanks, Alan
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles


_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles


   
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20170206/a0c0755b/attachment.html>