O-Ring Groove Design Extrusion Limits | Seal & Design, Inc.

O-Ring Groove Design Extrusion Limits

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Extrusion DiagramAn o-ring is contained in a gland and forced to flow into the surface imperfections of the glands and any clearance gaps available to it.

An o-ring can perform sealing by means of squeeze under low pressure conditions. The extent of extrusion depends upon the hardness of O-ring, the pressure, and the size of the clearance gap.

Extrusion Limits Chart

Extrusion Pressure Info

 

Hardness (Shore A) Pressure (PSI)
Below 500 500 - 1000 1000 - 1500 1500 - 2000 2000 - 3000
70 0.016 0.010 0.006 0.004 0.002
90 0.028 0.024 0.020 0.016 0.010