EXTRUSION: Patented Seal For Hydraulic, Manual Screen Changers

Features springs that provide lock-up force for immediate seal protection.

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Kolcor Technologies LLC, Agawam, Mass., has been awarded a U.S. Patent for the unique sealing device it uses on its line of hydraulic and manual screen changers. The unique seal design reportedly ensures no material leakage up to 10,000 psi and temperatures up to 650 F. 

This seal is supplied standard on all Kolcor hydraulic and manual screen changers, and unlike other designs, which need to get up to operating temperature for the seal to work, this seal features springs that provide lock-up force for immediate seal protection, the company says.

Once the Kolcor screen changer is running at operating temperature, the polymer pressure only increases the seal force, creating true leak-free processing.