Jamesbury® butterfly valve, series 800

Wafer-Sphere® resilient seated butterfly valve

Metso's Jamesbury® Wafer-Sphere® high-performance butterfly valves combine unique off-center disc, proprietary seat design and Xtreme® sealing technology. Tight, long-lasting sealing, and yet light and low-cost design makes it a good alternative to gate valves and other heavier rotary-type designs.


Very long service life

Bubble tight shut off

Low fugitive emissions


  • Robust engineering design
  • Flexible lip seat technology
  • Low emissions stem seal technology
  • Fire-tested & cryogenic designs
  • High cycle options
  • High quality



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