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Glossary A


Glossary A

Air Side
The side of a seal that normally faces away from the fluid being sealed.

Air Side Angle
The angle between the air-side surface and the shaft. Also barrel angle.

Angle, Contact Approach
See angle, outside lip.

Angle, Helix
The angle between a helical rib and the lip line of contact.

Angle, Helix Contact
The angle formed by the rib leading edge and the lip line of contact.

Angle, Helixseal Rib
The angle formed by the leading edge of the rib and a line perpendicular to a plane tangent to
the outside lip surface at the centerline of the rib base.

Angle, Inside Lip
The angle between the inside lip surface and the axis of the seal case.

Angle, Molded Toe
The angle between the toe face of a seal lip and the seal axis.

Angle, Outside Lip
The angle between the outside lip surface and the axis of the seal case.

Angle, Trimming
The angle between the trimmed face of a seal lip and the seal axis.

Assembly, Seal
A group of parts that includes sealing surfaces, provisions for initial loading and a secondary sealing
mechanism, which accommodates the radial and axial movement necessary for installation.

Axial Clearance
See Clearance, Axial.

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