The o-ring is the most widely used seal in the industry. It is easy to install, may be used as a double-acting seal and can seal pressures up to 3000 PSI. With pressures over 800 PSI, back-up rings should be considered, depending on the operating conditions and gland design.
The o-ring is typically used in static and reciprocating applications. The o-ring is not recommended for rotary applications as the o-ring will rotate with the shaft and cause a leak (lip seals are recommended for rotary applications). O-rings are typically sized by their inside diameter and cross section, and are further specified by the type of compound and durometer hardness which best suits the application. For O-ring sizes other than standard sizes, specify the actual dimensions desired for the inside diameter (I.D.) and the cross section (W). There may be a tooling charge for such non-standards
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Take a look at our seals guides. Updated: 10/17/19