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Glossary I


Glossary I

Inclusion:
Foreign matter included in the seal material.

Incomplete Trim:
A trimmed surface which does not have all designated material removed.

Index, Spring:
The ratio of the mean coil diameter to the wire diameter of a garter spring to exclude contaminants

Insert, Lip:
A material such as PTFE bonded onto a lip of an elastomeric seal to provide improved experiences the closest approach and effects the primary seal.

Interface:
The region between the static and dynamic sealing surfaces in which there is contact, or which experiences the closest approach and effects the primary seal.

Interference, Lip:
See Interference, Seal.

Interference, Seal:
The difference between the seal lip and shaft diameters.

International Rubber Hardness Degrees (IRHD):
A standard unit used to indicate the relative hardness of elastomeric materials, where zero represents a material having a Young’s modulus of zero, and 100 represents a material of infinite Young’s modulus.

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