Elastomer O-Rings

Fully molded elastomer O-rings for critical sealing applications. Standard and custom sizes available in a range of high performance elastomer materials.

Standard and non-standard O-ring sizes

We hold a comprehensive range of molds for international standard O-ring sizes BS1806, BS4518, AS568 and ISO3601. For non-standard O-ring seals we can produce custom tooling in-house very quickly, 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.

An O-ring for every application

With an unrivalled range of elastomer materials available, Precision Polymer Engineering has an elastomer for every application, with performance characteristics that withstand high temperature, high pressure and aggressive chemical applications.

Using one of the largest molding machines available, PPE manufactures high quality, fully molded, large diameter O-rings and custom parts for use in compressors, valves, oil & gas equipment, large bore diesel engines, large high pressure
vessels, Flat Panel Display (FPD) and semiconductor manufacturing equipment.

PPE’s large diameter, precision molded O-rings and seals are available in sizes up to 2.5 metres (8ft) outer diameter and cross sections from 5mm (0.2″) to 20mm (0.79″).

PPE’s specialist manufacturing capability for micro sized elastomer O-rings and components solves some of the most critical sealing applications, requiring the highest level of precision; including microfluidics (flow control and dispensing), bioanalytical, industrial automation and semiconductor process tools.

Parts are manufactured in a fully automated, ISO Class 6 clean room, cell with robotic handling and camera inspection, within a dedicated production area.

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.

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.

With more than 40 years of industry experience in cleanroom manufacturing and supplying elastomer O-rings, the world’s leading semiconductor fabs, foundries, and OEMs trust PPE to provide reliable and effective sealing solutions for
their critical applications.

PPE develops high-performance elastomers that offer high purity, chemical resistance, plasma resistance and high temperature capability O-rings for semiconductor applications.

Using one of the largest molding machines available, PPE manufactures high quality, fully molded, large diameter O-rings and custom parts for use in compressors, valves, oil & gas equipment, large bore diesel engines, large high pressure
vessels, Flat Panel Display (FPD) and semiconductor manufacturing equipment.

PPE’s large diameter, precision molded O-rings and seals are available in sizes up to 2.5 metres (8ft) outer diameter and cross sections from 5mm (0.2″) to 20mm (0.79″).

PPE’s specialist manufacturing capability for micro sized elastomer O-rings and components solves some of the most critical sealing applications, requiring the highest level of precision; including microfluidics (flow control and dispensing), bioanalytical, industrial automation and semiconductor process tools.

Parts are manufactured in a fully automated, ISO Class 6 clean room, cell with robotic handling and camera inspection, within a dedicated production area.

For O-rings used in food, dairy and pharmaceutical applications PPE offers a variety of elastomer material grades compliant with many inte ational 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.

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.

With more than 40 years of industry experience in cleanroom manufacturing and supplying elastomer O-rings, the world’s leading semiconductor fabs, foundries, and OEMs trust PPE to provide reliable and effective sealing solutions for
their critical applications.

PPE develops high-performance elastomers that offer high purity, chemical resistance, plasma resistance and high temperature capability O-rings for semiconductor applications.

O-rings for every application

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.


We hold a comprehensive range of mold tools for standard O-ring sizes BS1806, BS4518, AS568, ISO3601, plus others. For non-standard sizes, we can produce custom tooling very quickly in-house, providing cost effective solutions and a more responsive service. Our manufacturing lead-times are some of the shortest in the sealing industry.

Look up which O-rings sizes do not incur a tooling charge in our Resources section below.

O-ring products

Using one of the largest molding machines available, PPE manufactures high quality, fully molded, large diameter O-rings and custom parts for use in compressors, valves, oil & gas equipment, large bore diesel engines, large high pressure vessels, Flat Panel Display (FPD) and semiconductor manufacturing equipment.

PPE’s large diameter, precision molded O-rings and seals are available in sizes up to 2.5 metres (8ft) outer diameter and cross sections from 5mm (0.2″) to 20mm (0.79″).

PPE’s specialist manufacturing capability for micro sized elastomer O-rings and components solves some of the most critical sealing applications, requiring the highest level of precision; including microfluidics (flow control and dispensing), bioanalytical, industrial automation and semiconductor process tools.

Parts are manufactured in a fully automated, ISO Class 6 clean room, cell with robotic handling and camera inspection, within a dedicated production area.

O-rings manufactured to BS4825 Part 5 to fit RJT hygienic union connectors

Aseptic O-rings according to DIN 11864 (form A) are commonly used in DIN 11866 pipe couplings.

Need a kit of sealing components for MRO operations? Look no further than our O-ring and seal kits.

O-ring applications

For O-rings used in food, dairy and pharmaceutical applications PPE offers a variety of elastomer material grades compliant with 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.

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.

With more than 40 years of industry experience in cleanroom manufacturing and supplying elastomer O-rings, the world’s leading semiconductor fabs, foundries, and OEMs trust PPE to provide reliable and effective sealing solutions for their critical applications.

PPE develops high performance elastomers that offer high purity, chemical resistance, plasma resistance and high temperature capability O-rings for semiconductor applications.

PPE O-rings and seals combine extreme temperature capability with virtually universal chemical resistance, and outstanding mechanical strength. They represent peace of mind for sealing solutions in applications where failure is not an option.

The low temperature performance of O-rings components can be critical in aerospace, pharmaceutical/medical, oil & gas, food/dairy and petrochem applications. When subjected to low temperatures, O-rings can lose their flexibility with a much-reduced capacity to respond to a reaction force. PPE has an excellent selection of grades which seal reliably in low temperature applications.

Under long term exposure to high pressure operating conditions, many elastomer O-rings can experience reduced sealing capacity through the impact of compression set. PPE’s material specialists have developed grades specifically for the high pressure demands of oilfield and industrial applications, ensuring performance and reliability where seal failure is not an option.

PPE is a specialist in the development and manufacture of high performance O-rings for critical applications

PPE Material Brands

O-rings can be produced in the following material types, for a sealing solution tailored to the demands of your industry and application.

The ultimate perfluoroelastomers for sealing applications where chemical resistance and high temperature performance are critical.

The ultimate range of elastomers for sealing applications in the world’s most aggressive high pressure environments.

A range of X-ray and metal detectable elastomers for the ultimate contamination detection and containment.

Tools

Here are some key tools for maximising the effectiveness and longevity of your O-rings…

International O-ring sizes

We manufacture elastomer O-rings from a broad range of material grades to the following international standard O-ring sizes.

O-ring size (no tooling charge)

Search for O-ring sizes which do not incur a tooling charge when combined with selected PPE materials.

O‑Ring Removal Tool

Get in touch with PPE’s sealing experts to request your free O-ring removal tool, and prevent damage to the seal, grooves, and housings.

Resources

Below are some of our most popular resources relating to O-rings.

If you require further information on any sealing topic, please check out the Resources section of this website.

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