Keystone Series GR Butterfly Valves

Description

Keystone Series GR general purpose resilient seated butterfly valves are available in flanged, lugged or wafer body style for any service where drop-tight shut-off and maximum flow area is required.

Features

  • Double flanged body design with face-to-face dimensions, according to EN 558 Series 20, API 609 and AWWA C504 short.
  • Designed according to EN 593 and API 609.
  • The seat is field replaceable and fully isolates the body and shaft from the flow.
  • Primary shaft sealing exceeds the pressure rating of the valve and prevents leakage through the shaft area to the 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.
  • Shaft seals prevent moisture penetrating into the shaft area.
  • Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life, and drop-tight shut-off.

Specifications

Sizes: DN 50 – 900 (NPS 2 – 36)
Pressure: 16 bar DN 50 – 300 (230 psi NPS 2 – 12) / 10 bar DN 350 – 900 (150 psi NPS 14 – 36)
Reinforced seat: 16 bar DN 350 – 600 (230 psi NPS 14 – 24)
End of line: 10 bar DN 50 – 300 (150 psi NPS 2 – 12) / 6 bar DN 350 – 900 (90 psi NPS 14 – 36)
Reinforced seat: 10 bar DN 350 – 600 (150 psi NPS 14 – 24)
Vacuum service: 0.4 bar (5.8 psia)
Temperature: `-40°C to +160°C (-40 °F to +320°F)
Flange accommodation: PN 6/10/16, 125/150, JIS 10K, BS Table E, AS4087 PN 16, AS2129 Table E

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Keystone Series GR Butterfly Valves

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