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O-Rings & Backup Rings

Simple, Economical Sealing Solutions Engineered for Pressure, Temperature, and Reliability

The O-ring is the most widely used sealing device in the fluid power industry because it is effective, economical and easy to use. It is available in many synthetic rubber formulations, from basic Nitrile to the high performance perfluoroelastomers. The parameters of fluid, pressure, and temperature will determine which O-ring is best suited for a given application. When pressure forces the O-ring, which is in essence a highly viscous fluid with a very high surface tension, to flow within a grove, it flows against and slightly into any gaps. by blocking the clearance, fluids and gases are sealed in and prevented from escaping. The nature of the O-ring is to remember its original shape and attempt to return to it. This elastomeric memory feature is what precludes an O-ring from extruding into the gaps that it is sealing.

When the width of the extrusion gap (diametral clearance) exceeds design recommendations for the operating pressure, back-up rings are often recommended. The most common back-up rings are molded endless from 90 durometer elastomers, PTFE, or filled PTFE materials. These rings can be machined as split or solid(endless), depending on the ease of assembly into the application hardware.

O-Ring Sizing Chart
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Custom-Molded Rubber

Buckeye furnishes custom molded rubber parts of every description, for a wide variety of applications, from a wide range of base polymers. We can produce special components to meet your particular requirement.

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Hydraulic Lip Seals

Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.

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O-Rings & BackUp Rings

Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.

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Die-Cut Gaskets

Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.

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Custom-Molded Rubber

Custom-Molded Rubber

Buckeye furnishes custom molded rubber parts of every description, for a wide variety of applications, from a wide range of base polymers. We can produce special components to meet your particular requirement.

Learn More

Hydraulic Lip Seals

Hydraulic Lip Seals

Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.

Learn More

O-Rings & BackUp Rings

O-Rings & BackUp Rings

Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.

Learn More

Die-Cut Gaskets

Die-Cut Gaskets

Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.

Learn More

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