Precision Polymer Engineering manufactures and supplies fully molded elastomer O-rings from 1.5mm (0.06") to 2.5 metres (8ft) outer diameter, and 0.8mm (0.03") to 12mm (0.47") cross section. Rubber O-rings can be manufactured in both small and large volumes, from just 1 O-ring up to 1 million+.
Standard and non-standard O-ring sizes
We hold a comprehensive range of molds for standard O-ring sizes BS1806, BS4518, AS568 and ISO3601. For non-standard O-ring seals we can produce custom tooling very quickly (92% of O-ring tools are produced same day) providing cost effective solutions and a more responsive service. Our manufacturing lead-times are some of the shortest in the sealing industry.
Need help sizing your hardware for standard size O-rings? Consult our easy-to-use O-ring groove dimensions tool.
O-Ring Removal Tool
High performance materials
With an unrivalled range of elastomer materials available, Precision Polymer Engineering has an elastomer for every application, with performance characteristics that meet high temperature, high pressure and aggressive chemical applications.
O-rings for Mechanical Seals
Engineered mechanical seals used in pumps, compressors and other rotating equipment are often subject to demanding, unpredictable operating environments. Static sealing locations on these complex, high value assemblies is catered for by elastomer O-rings. Perlast® perfluoroelastomer O-rings offer the highest chemical and temperature resistant seals allowing mechanical seals that utilise them to be specified into a wide range of applications.
Food/medical grade O-rings
For O-rings used in food, dairy and pharmaceutical applications PPE offers a variety of elastomer material grades compliant with many international requirements such as FDA, USP Class VI and 3A Sanitary Standards in addition to metal detectable O-rings, all of which are free from Animal Derived Ingredients. RJT O-rings and DIN11864 O-rings are also available to fit hygienic unions.
Pre-formed 'shaped' rubber O-rings are used to assist assembly and prevent unnecessary stresses being placed upon the seals. Such rubber O-rings are often used for rectangular path door seals or to navigate around pipe-work. By removing permanent stresses from the O-ring, PPE pre-formed O-rings can extend the life of the part in your application.
Large diameter O-rings
PPE offers the largest fully molded, formed elastomer O-rings manufactured on a single tool, in one pressing operation. Take a look at how you can benefit from our large diameter O-rings.
Why do O-rings fail?
Reasons can be many, but the most common are detailed on our 'Why do O-rings fail?' page. Find out what causes O-ring failures and how to avoid them. Being able to identify some of the common problems will drastically reduce downtime and avoid potential problems in your process equipment.
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Engineers Hub Resources
Here you will find resources to help you determine the right solution for your O-ring application.
An interactive list of all PPE material grades, including links to datasheets, which can filtered using various options.
View and download international O-ring size charts for metric and imperial O-ring sizes.
Our Material Brands
Precision Polymer Engineering offer industry-leading elastomer material ranges that suit a variety of demanding applications.
The ultimate range of elastomers for sealing applications in the world's most aggressive high pressure environments.
Perlast ICE Perfluoroelastomers
Exceptional perfluoroelastomers for extreme low temperature sealing applications.