Keystone 9 Butterfly valve

Keystone 9 Butterfly valve

A resilient seated butterfly valve for general purpose application.

End Connection Wafer
Application Air Circulation, Facilities & Process Utilities
Material 316 Stainless Steel, Cast Iron
Operating Temperature Up to 250 F (120 C)
Pressure Class ASME
Process Connection Type 150RF
Seat/Seal Type Resilient
Shutoff Class Zero Leakage
Valve Size Standard NPS
Valve Type Butterfly
Media Air, Liquids, Water
Stem O-ring
  • Bubble-tight shut-off at full pressure rating (PTFE lined configuration is drop tight).
  • The seat and the disc are the only two valve parts in contact with the medium.
  • Superior design for abrasive and erosive media.
  • Famous Keystone dovetail seat design.
  • Very low pressure drop.
  • Large number of material combinations available.
  • Standardized actuator flange for easy operator interchangeability.
  • Top bushing absorbs side thrust loads.
  • Hub seal provided by preloaded contact between flatted seat surface and disc hub area for positive sealing at all disc positions.
  • One-piece wafer thin disc stem gives the very minimum obstruction to flow.
  • Field replaceable seat isolates the body and stem from the flow.
  • Molded-in O-rings provides flange sealing and eliminates need for gaskets.

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