Delivering Fluid Sealing Solutions Since 1972

RJT O Ring Seals

RJT O Ring Seals – Certified to FDA & 3A Standards

M Barnwell Services is one of the UK’s leading stockist, distributor, and manufacturer of RJT O Ring and Hygienic Seals.

RJT O Rings are certified to BS4825-5:2009, FDA, EC1935/2004 & EC2023/2006 Regulations, USP Class VI, and 3-A Standards grades and materials include Perfluoroelastomer (FFKM)Nitrile (NBR)Hydrogenated Nitrile (HNBR)Viton® (FKM/FPM)Ethylene Propylene (EPDM) and Silicone (VMQ). Metal / X-Ray detectable elastomers are also available from our Metal Detectable selection. Full documentation and certificates can be provided.

RJT O Ring

M Barnwell Services source, stock and manufacture elastomer RJT O Rings from an extensive range of materials to suit RJT hygienic union connectors.

The RJT stands for Ring Joint Type. They are used considerably in the dairy, beverage and brewing industries and are rather popular for sections of pipework that are regularly disassembled (example: for cleaning). RJT unions are an O Ring style gasket and are, therefore, the most popular in the food industry.

Consequently, RJT gaskets are food grade, high performance and of a minimum risk of foreign body contamination, as they are detectable by metal detection and x-ray inspection systems.

RJT O Ring Seal benefits:

• Can operate in a broad range of temperatures (-60°C to +230°C)
• Provide eminent general weathering resistance
• Hydraulic oil, steam, and acid resistant
Detectable by metal detection and x-ray inspection system
FDA compliant

Other pipe connectors sealing products are available: IDF Gaskets, Hyclamp™ sanitary gaskets, and DIN11851 D seals.

If you would like more information about our range, download our catalogue, or contact a member of the team.

E & OE.


Popular sizes: ID 1" (26.7mm) to 4" (93.9mm) with CS 6.6mm.

Other sizes available on request


Perfluoroelastomer (FFKM), Nitrile (NBR), Hydrogenated Nitrile (HNBR), Viton® (FKM/FPM), Ethylene Propylene (EPDM) and Silicone (VMQ)


BS4825-5:2009, FDA, EC1935/2004 & EC2023/2006, and 3-A Standards Grades


O-Ring Kits, Selection Boxes, Splicing Kits & Top-up Bags are available