By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Quad ring seals

All Topics | Latest Posts

Search for:  in Thread Title in  
duncan webster06/02/2021 19:21:25
5307 forum posts
83 photos

I've bought some quad ring seals to use on my latest loco instead of o rings for the piston seals. The manufacturers recommend 10-15% squeeze, same as O rings, but I'm aware that people use much less on orings in steam engines. Anyone got relevant experience? Save me experimenting.

quad

No I didn't pay Trelleborg prices!

old mart06/02/2021 20:42:06
4655 forum posts
304 photos

You could try them at standard fits, and if that proves too tight, just deepen the ring groove in the piston. Quad ringsare intended for use with hydraulic oil or brake fluid, so a steam engines lower lubrication and heat might be a problem. I hope there is an o ring of the same size to use if the quad rings prove problematic.

JasonB07/02/2021 07:16:05
avatar
25215 forum posts
3105 photos
1 articles

I only have one engine that specified quad rings but could not source them at the right price at the time so did not use them but the drawing suggest 3 to 5% compression. This seems to be similar to the suggested compressions of O rings for ME use which are about half the commercial amount.

duncan webster07/02/2021 12:20:15
5307 forum posts
83 photos

Thanks Jason, I'll try that

noel shelley07/02/2021 13:01:30
2308 forum posts
33 photos

O rings are available in numerous materials, nitrile, viton, silicon and also in various grades of " shore" hardness. Shore 70 being normal. Endless hours of fun for the experimenter ! Noel.

Nigel Graham 228/02/2021 23:33:34
3293 forum posts
112 photos

O-rings are also made in grades to suit whether static, rotating or reciprocating seals; presumably not interchangeably.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate