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Parker´s O-Ring Selector is an engineering tool which offers O-ring material and size selection combined in one tool. Both are interlinked, thus ensuring the best possible combination of the calculated O-ring size and material choice. The O-Ring Selector covers both imperial and metric standards.
Service Conditions & Material Selector
The Advanced Material Selector allows you to specify your service conditions in even greater detail:
For instance, you can select and combine the fluids which are relevant to your application by using the Filter by Fluid Compatibility search bar. This search and filter function searches a database of more than 2,500 different materials.
You can also search for Certifications.

Size Selector

In the Hardware Configuration, you can choose between different sealing cases such as radial piston or rod sealing, axial sealing with internal or external pressure.
After selecting a material that fits your sealing application, you can continue by having the Size Selector calculate the O-ring dimensions and tolerances, considering even thermal expansion and volume swelling of the sealing element. The parameter dashboard in the Results section will immediately show you if the selected O-ring size is suitable for your application.
Customer Service
Sales Company Nordic
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Nordic Group Sales Leader - Engineered Materials
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Parker Sealing Shielding Blog
Learn from the engineering experts at Parker as they share their knowledge. Read design tips, FAQs, case studies and learn about trends in the industry.

Finnish blog for O-Ring Selector tool
Watch "How to Use"
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“How to Use” ̶  Watch our Video
Find the most suitable sealing material by specifying your minimum and maximum Operating Temperature, the desired Polymer Group or Seal Hardness.

We welcome your feedback
The Parker
O-Ring Selector
Fully integrated material and size selection
Platform-independent and web-based
Easy. Fast. Reliable.

Add your comments in the Notes section and save your calculation to your computer as a PDF document.