An O-ring is a torus, or doughnut-shaped ring, generally molded from an elastomer or thermoplastic material, such as PTFE. O-rings are used primarily for sealing and protecting against liquid and gas loss, and can function in a wide range of temperatures, pressures. O-ring sizes are specified by the inside diameter and the cross-section diameter. They are manufactured according to metric and imperial international standards such as AS 568B, DIN ISO 3601, and JIS. Custom O-rings of almost any size, from miniature to large dimensions, can be molded to form continuous parts, or spliced from extruded cord.

What is an O-Ring Seal?

An O-ring seal is used to prevent the leakage of a liquid or gas. The seal assembly generally consists of an elastomer O-ring which sits in a sealing gland. An O-ring is a circular cross-section ring molded from polymer. The gland — usually cut into the metal or other rigid material of the fluid system — contains and supports the O-ring. Each of these two elements is meticulously designed and manufactured to create the best possible seal.

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As the leading designer and manufacturer of rubber parts and seals, DESIOR Rubber has a wide range of products to meet all your sealing needs. From our vast o-ring inventory of virtually any shape and size to our complex, custom sealing solutions, we have precisely what you need for any sealing application.

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All You Need to Know About Silicone O-Rings in the Chemical Industry

Discover the essential information about silicone O-rings and their applications in the chemical industry. Learn about their unique properties, benefits, and how they are used in various rubber produc

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