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Keystone Figure 221/222 Butterfly Valves
Keystone Figure 221-222 - Family
Keystone Figure 221/222 economical bonded resilient seated butterfly valves are designed for bi-directional and end-of-line service available in both wafer (Figure 221) and lugged (Figure 222) style.
Keystone Figure 221/222 Butterfly Valves


304 Stainless Steel, 316 Stainless Steel, Buna-N, Cast Iron, Epdm Rubber
Operating Temperature
Up to 250 F (120 C)
Pressure Class
Process Connection Type
Seat/Seal Type
Shutoff Class
Zero Leakage
API 609, ASME B16.34
Valve Size
5 inch, NPS 10 / DN 250, NPS 12 / DN 300, NPS 2 / DN 50, NPS 2-1/2 / DN 65, NPS 3 / DN 80, NPS 4 / DN 100, NPS 6 / DN 150, NPS 8 / DN 200
Valve Size Standard
Valve Type


  • Bubble tight shut-off at full rated pressure in both directions.
  • The F222 lugged version is suitable for bi-directional end-of-line service at full pressure rating.
  • Top and bottom bearings absorbs side thrust loads.
  • A moulded-in O-ring in the seat for flange sealing eliminates the need for flange gaskets.
  • Body locating holes for easy installation and centering between flanges.
  • Extended neck allows adequate clearance for flange and insulation.


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