Keystone Model OptiSeal Butterfly Valves

Keystone Model OptiSeal Butterfly Valves

Keystone™ OptiSeal is a resilient seated butterfly valve for general purpose application. Figure 14 wafer: DN 40-300, figure 15 wafer: DN 350-1000, figure 16 lugged: DN 40-300 and figure 17 lugged: DN 350-1000.

Any questions?

Anders Praem
Inside Sales Engineer
Phone. 2137 7759

Anders.Praem@askalon.dk

Kenn Gerwien
Area Account Manager
Phone. 2346 5513

Kenn.Gerwien@askalon.dk

Slawka Pedersen
Inside Sales Manager
Phone. 2137 7702

Slawka.Pedersen@askalon.dk

Certifications CUTR, SIL capable, PED
End Connection Wafer, Lugged
Application Winemaking, Beverages, Automotive, Air Circulation
Material Super Duplex, Hastelloy, Epdm Rubber, Duplex, Cast Iron, Carbon Steel, Buna-N, 316L Stainless Steel, 316 Stainless Steel
Operating Temperature Up to 250 F (120 C)
Pressure Class PN
Process Connection Type PN16
Seat/Seal Type Resilient
Shutoff Class Zero Leakage
Valve Size NPS 20 / DN 500, NPS 10 / DN 250, NPS 8 / DN 200, NPS 6 / DN 150, NPS 4 / DN 100, NPS 3 / DN 80, NPS 24 / DN 600, NPS 2-1/2 / DN 65, NPS 18 / DN 450, NPS 16 / DN 400, NPS 14 / DN 350, NPS 1-1/2 / DN 40
Valve Size Standard DN
Valve Type Butterfly
Media Liquids, Water, Hot Water, Liquid, Air
Stem O-ring
  • Top bushing absorbs actuator side thrust loads.
  • Actuator flange acc. ISO 5211.
  • High solid, glossy, silicone free, paint system ensuring excellent corrosion resistance.
  • Extended body neck allows pipe insulation.
  • Body locating holes ease installation and centering between the flanges.
  • Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and bubble-tight shut-off.
  • The seat is field replaceable and fully isolates the body and stem from the flow.
  • Primary stem sealing exceeds the pressure rating of the valve and prevents leakage through shaft area to atmosphere.
  • A secondary shaft sealing provides back‑up safety.
  • No flange gaskets required.
  • High Cv value.
  • Top and bottom shaft bearings for optimized support and minimum friction in all body materials up to DN 300, except cast iron.

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