A large volume and wide variety of hazardous and toxic materials are currently in use; coupled with increasingly stringent regulatory requirements this makes positive containment and control measures mandatory. Typical applications for so-called zero-leakage valves include thermic fluid, ammonia, chlorine, phosgene, butadiene, benzene, ethylene, hydrochloric acid, hydrogen, steam, fatty acid and Cat. M Fluids as per ASME B31.3, to name just a fraction of the many possible uses. Bellow seal technology is much spoken of as an 'Absolute Zero" barrier to atmospheric leakage; a design that eliminates product losses, hazards to humans, the environment, and costly downtime required for packing maintenance.
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