Economical split seals take on tough conditions

The MSS series split-seal from Flowserve is designed for use on mixers, reactors and other containment vessels.

The MSS series split-seal from Flowserve is designed for use on mixers, reactors and other containment vessels.

It is particularly suited for use on older equipment where severe shaft wobble and run-out eccentricities are encountered, or where compression packing is being replaced by a mechanical shaft seal.

They provide advanced performance for wet or dry running and are specified on mixer drives used for the blending of pharmaceuticals, food supplements, polymers, solvents, acids and many other chemical products.

Under dry-running conditions the seals provide the practical alternative to packings and liquid running seals on top entry mixers.

The MSS seal is also a good choice for side entry reactors or other conditions where wet face running is anticipated.

The split seal design ensures that installation can usually be completed in less than an hour, even within tight spaces and without the need for special tools.

Cumulative shaft run-out, eccentricity and deflections of up to 0.150in TIR can be accommodated.

There is no need for time-consuming removal of gearboxes and motor drives, and the external seal assembly ensures simplicity of installation with ease of inspection and maintenance.

The unique design and construction of the MSS mixer seal ensures that only nonmetallic parts are in contact with the process fluids or gasses.

This eliminates the possibility of adverse chemical reactions through fluid to metal contact.

Seal faces are also self-lubricating with good heat dissipation properties, making unnecessary the expense involved with installation and maintenance of buffer fluid systems.

Because these seals can also withstand pressure reversals, the problem of product contamination is also avoided when vessels are emptied or drawn down causing vacuum conditions.

Seals can be provided for most common sizes ranging between 25 and 305mm diameter, with other nonstandard imperial and metric shaft diameter sizes also available.

Operating pressures range from full vacuum up to 5bar for dry running, and up to 7bar for wet running conditions.

Speeds range from 350 (dry) up to 1750rev/min (wet), at operating temperatures up to 121C.

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