An endless step moulded O ring is moulded as one continuous piece, with no glued or vulcanised joint.
OringOne lists these rings from 200 mm inside diameter.
Moulded versus spliced
A spliced ring can be acceptable in a static groove with mild media, modest temperature and easy access for replacement.
A one piece ring is the safer choice where the ring sees temperature cycling, aggressive chemicals, steam or cleaning cycles, or where a leak means a long shutdown.
[Placeholder: Andrew's real joint failure story]
Size and tolerance
- From 200 mm inside diameter, no dimension limits stated
- Standard tolerance ISO 3601 class B, grade N
- Class A and grade S available on request
- Cross sections confirmed on enquiry
Materials available
VMQ, NBR, HNBR, FKM, FFKM, FEPM, EPDM and CR. FDA, 3A and USP Class VI certification available.
How to enquire
Send us the inside diameter, cross section, material, duty, media, temperature and pressure. If you have an existing ring or drawing, a photo helps.
See also our large diameter O ring sourcing guide.
Frequently asked questions
- What does endless mean?
- The ring is moulded as one continuous piece with no joint.
- When is a spliced ring good enough?
- Often in static, mild, easily accessed duties. Tell us the duty and we will say.
- What tolerance is standard?
- OringOne lists ISO 3601 class B, grade N as standard, with class A and grade S on request.
Specifications are from OringOne and are confirmed on enquiry. Source: OringOne large O rings.
Enquire about OringOne O rings
Tell us the size and duty. We check the choice before you order.