Double Mechanical Seal with Bearing

J I Mech Seal and Engineering is a well-known manufacturer and supplier of double mechanical seals with bearings.

A dry-running mechanical seal can form a direct contact seal for extended periods at both low and high rotational speeds without undue heating or wear of the seal faces. The rear surface of the stator face and the corresponding surface of a mounting plate are both lapped for maximum direct contact transfer of heat.

Air from a region surrounding the shaft is circulated through a cooling annulus directly behind the stator face and out through exit ports. In embodiments, enlarged scallops or other features on the rotor seal face enhance air turbulence near the seal faces.

In various embodiments a surface supporting a dynamic gasket is polished smooth, thereby reducing gasket drag, minimizing the required pressing force between the seal faces, and reducing frictional heating. In embodiments, the rotor seal face shape is optimized to minimize pressure distortions at high pressure.

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