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Keystone WINN Hi-Seal High Performance Butterfly Valve
WINN Hi-Seal High Performance Butterfly Valve
Hi-Seal, high performance Butterfly valves offer efficient, bi-directional sealing across a wide spectrum of service conditions
Keystone WINN Hi-Seal High Performance Butterfly Valve


End Connection
Wafer, Lugged, Double Flanged
Air Circulation, Balance of Plant, Biofuels, Clean Steam, Desalination, Cruise Ship, Container Ship, Marine Docks, Refining, Steam Headers, Fuel Gas, FPSO, Fueling
316 Stainless Steel, Aluminum Bronze, Carbon Steel, Duplex, Super Duplex
Pressure Class
Process Connection Type
CL150RF, CL300RF, CL600RF
Seat/Seal Type
High performance, Metal, Soft Seal
Shutoff Class
Zero Leakage
API 609, ASME B16.34
Valve Size
NPS 6 / DN 150, NPS 10 / DN 250, NPS 12 / DN 300, NPS 14 / DN 350, NPS 16 / DN 400, NPS 18 / DN 450
Valve Size Standard
Valve Type
Vacuum, Steam, Ammonia, Fuel Oil, Hot Water, Liquid, Oxygen, Specialty Gases, Water
Adjustable packing, Live loaded


  • Positive sealing which is mechanically achieved and does not rely on line pressure assistance.
  • Bi-directional shut-off performance.
  • Body design options: wafer, lugged or double flanged.
  • Suitable for use on end-of-line service (lugged and double flanged).
  • Available in 3 design options. Soft seated, fire-safe or metal seated.
  • Compact design, minimizes weight, installation and maintenance costs.
  • Long life durability due to double offset operating principle minimizing seat wear.
  • One piece shaft for maximum strength and safety with long life.
  • Accessible packing adjustment without operator removal.
  • Fast and simple seat replacement.