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Keystone Figure 990/920 Butterfly Valves

Thin disc split-body design optimized for high flow and modulating service with corrosion and abrasion resistance.

Keystone Figure 990/920 split body, thin disc resilient seated butterfly valves are designed for high flow and modulating service. These valves excel in heavy duty applications where corrosion and abrasion resistance is required. These valves are available in both wafer (Figure 990) and lugged (Figure 920) style.

主な特長

  • One-piece, thin profile, disc stem provides minimum obstruction to flow, resulting in highest Cv, lowest pressure drops and best control characteristics.
  • Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and tight shut-off.
  • Triple function, resilient seat isolates body and stem from line media, provides drop-tight shut-off of line media at full-rated pressure and provides positive flange sealing, eliminating the need for flange gaskets.
  • Heavy duty, corrosion resistant top bushing provides upper stem support, absorbs actuator sideloading and extends valve cycle life.
  • Bi-directional, self-adjusting double V-cup stem seals prevent external contaminants from entering the valve.
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