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Keystone Figure 990/920 Butterfly Valves
Keystone Figure 990-920 Resilient Seated Butterfly Valves-FAMILY
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.
Keystone Figure 990/920 Butterfly Valves

Specs

Material
316 Stainless Steel, Buna-N, Cast Iron, Ductile Iron, Duplex, Epdm Rubber, Hastelloy, Monel, Super Duplex, Teflon, Titanium
Operating Temperature
Up to 250 F (120 C)
Pressure Class
ASME
Process Connection Type
150RF
Seat/Seal Type
Resilient
Shutoff Class
Zero Leakage
Standards
API 609, ASME B16.34
Valve Size
nch, NPS 1 / DN 25, NPS 10 / DN 250, NPS 1-1/2 / DN 40, NPS 12 / DN 300, NPS 14 / DN 350, NPS 16 / DN 400, NPS 18 / DN 450, NPS 2 / DN 50, NPS 20 / DN 500, NPS 2-1/2 / DN 65, NPS 3 / DN 80
Valve Size Standard
NPS
Valve Type
Butterfly
Valve Size
NPS 1-1/2 / DN 40, NPS 14 / DN 350, NPS 16 / DN 400, NPS 8 / DN 200, NPS 18 / DN 450, NPS 2 / DN 50, NPS 20 / DN 500, NPS 6 / DN 150, NPS 10 / DN 250, NPS 1 / DN 25, 5 inch, NPS 4 / DN 100, NPS 12 / DN 300, NPS 2-1/2 / DN 65, NPS 3 / DN 80
Valve Size Standard
NPS
Valve Type
Butterfly
Media
Specialty Gases, Liquids, Air, Inert Gas, Water, Air
Stem
O-ring

Features

  • 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.
  • Bi-directional, self-adjusting double V-cup stem seals prevent external contaminants from entering the valve.

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