dupont has developed a unique seal design to improve seal life in dovetail grooves. this design benefits from the excellent chemical, thermal and plasma resistance of dupont™ kalrez® perfluoroelastomer parts with a unique cross-sectional trilobe seal that eliminates many of the problems associated with semi-dynamic seal applications using a dovetail groove. these problems include installation difficulties as well as short seal life and particle generation due to seal wear and degradation.
features and benefits
- molded notch makes installation a snap
- reduces installation time.
- avoids improper installation.
- geometry interlocks in groove to prevent seal from rolling and twisting during installation.
- bottom lobes lock seal in place to resist pullout and movement during actuation.
- seal parting lines are maintained below the flange surface, eliminating direct exposure to plasma or process chemicals.
- seal design and compound selection combine to yield reduced particle generation and significantly increase seal life.
suggested applications
- slit valve doors
- gate valves
- semi-dynamic sealing applications that utilize a dovetail groove configuration
availability
- molds have already been developed for a number of common slit valve door seal part sizes.
- a dupont™ kalrez® trilobe™ seal can be developed to fit any size dovetail groove.
- the kalrez® trilobe™ seal is available in a variety of compounds.