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8-203 NBR90
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B 8.3 X 14.3 X 1.27 NBR90

8-203 NBR90

UPC Code: 91059081

USD $0.55 /EACH
Retail price: USD $0.55 /EACH
    • EACH
  • Quantity Available: 10+
  • Availability: In stock
Untitled Document


NBR Back-up Ring

NBR, Buna N

Uncut, Dimensional stability of the O-Ring improves the sealing force and increases the service life. Preferably for static use.

General Back-up Ring Application:

Back-up Rings have no intended sealing function. Instead, as the name indicates they are supporting elements made with extrusion-resistant materials which generally have a rectangular cross section. They are installed in a groove together with an elastomeric sealing element preferably with a corresponding O-Ring in static applications. Due to the tight fit of the Back-up Ring in the housing, they prevent extrusion of the pressurized elastomeric sealing element into the sealing gap.

Used in a variety of applications such as with the use of O-Rings in high pressure applications, use of O-Ring materials with a low hardness, compensation of radial sealing gaps, use for internal and external sealing applications, reciprocating and rotating movements possible, compensation for large temperature fluctuations, static and dynamic applications.


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