O-ring standard introduction

O-ring is a common sealing element used in hydraulic and pneumatic systems. It is a ring-shaped seal made of elastomer material, which can be compressed and deformed under pressure to fill the gap between the mating surfaces and prevent leakage.

There are many different standards for O-rings, including AS568, JIS B2401, DIN 3771, and ISO 3601. These standards define the dimensions, tolerances, and material requirements for O-rings, ensuring that they can be used interchangeably in different applications.

AS568 is the most commonly used O-ring standard in the United States, while JIS B2401 is used in Japan and DIN 3771 is used in Europe. ISO 3601 is a global standard that harmonizes the different regional standards, making it easier for international manufacturers to produce and source O-rings.

In addition to the standard O-ring sizes, there are also custom O-rings that can be designed and manufactured to meet specific application requirements. These custom O-rings may have unique shapes, materials, and tolerances that are not covered by the standard O-ring standards.

Overall, O-rings are a versatile and reliable sealing solution that can be used in a wide range of applications. By following the appropriate O-ring standard and selecting the right material and size, designers and engineers can ensure that their hydraulic and pneumatic systems operate efficiently and leak-free.


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