MECO^® Standard Screw Conveyor Seals

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MECO^® shaft seals have revolutionized screw conveyor sealing. Screw conveyors exhibit almost universal leakage problems, due to the shaft runout and whip caused by their long, unsupported spans of flighting.

Original, elastomer-driven MECO seals, with their large-radius sealing faces, tolerate up to 1/4" of diametric runout. The elastomeric drive is flexible, absorbing shocks without compromising the seal faces. This simple, robust, tolerant seal is effective with dry powders, pastes, slurries, fluids, vapors and gases. Air-purged and unpurged versions are available. The "H" (unpurged) and "HE" (air-purged) series are the original MECO screw conveyor seals. First patented by MECO in 1976, this enduring design is still used extensively for screw conveyor applications.

This series begins with an H-shaped elastomer ring, which surrounds the shaft. Each end of the ring bears against a flat, rotating seal face, and these faces, in turn, bear against flat, stationary faces. An adjustable clamp, fastened around the middle of the elastomer ring, permits the seal faces to be tightened or loosened.

The "H" resides in an open housing. If leakage past the first seal face occurs, product will drop out of the seal and alert operators to the need for adjustment. "HE" seals incorporate a body block which permits an air purge to be introduced between the two seal faces, creating a more durable seal.

"H/HE" series seals

• can replace standard waste pack seals
• eliminate fretting & other packing-oriented shaft damage
• tolerate high shaft runout
• can be configured for unpurged or air purged operation
• are available with FDA-approved materials for food & pharmaceutical service
• can mount beneath standard, 4-bolt flange bearings
• are available in six, C.E.M.A.-standard shaft sizes from 1" through 3 7/16"

Beware of cheap imitations!

• Online Brochure (294kB)