Keystone BrewSeal Butterfly valves

Keystone BrewSeal Butterfly valves

Resilient seated butterfly valves DN 40 - 800 wafer and lugged versions, optimized for the food and beverage industry.

Certifications PED
End Connection Lugged, Wafer
Application Beverages, Brewing
Material Cast Iron, 316 Stainless Steel, Epdm Rubber, Teflon
Operating Temperature Less than 150 C
Pressure Class PN
Process Connection Type PN16
Seat/Seal Type Resilient
Shutoff Class Zero Leakage
Valve Size NPS 4 / DN 100, NPS 3 / DN 80, NPS 24 / DN 600, NPS 2-1/2 / DN 65, NPS 2 / DN 50, NPS 18 / DN 450, NPS 16 / DN 400, NPS 6 / DN 150, NPS 20 / DN 500, NPS 10 / DN 250, NPS 1-1/2 / DN 40, NPS 12 / DN 300, NPS 8 / DN 200, NPS 14 / DN 350
Valve Size Standard DN
Valve Type Butterfly
Media Liquids
Stem O-ring
  • Top bushing absorbs actuator side thrust loads.
  • Dirtscraper prevents moisture penetrating into the shaft area.
  • Actuator flange acc. ISO 5211.
  • High solid, glossy, silicone free, paint system ensuring excellent corrosion resistance.
  • Body locating holes ease installation and centering between the flanges.
  • Sealed body splits prevent moistures from penetrating behind the seat (up to DN 300).
  • 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.
  • A molded-in O-ring in the seat for flange sealing eliminates the need for gaskets.
  • The thin disc provides the very minimum obstruction to flow (up to DN 300).

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