Keystone Series GR Resilient Seated Butterfly Valves | JA Moody

Keystone Series GR Resilient Seated Butterfly Valves

GRW/GRL Sizes DN 50-900

The Keystone Series GR is a heavy duty industrial resilient seated butterfly valve aimed at general purpose applications.

keystone series GR resilient seated butterfly valves


  • Wafer and lugged body design with¬†face-to-face dimensions, according to EN 558 Series 20 and API 609
  • 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 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.
  • The two piece shaft allows for a thin disc and provides minimal obstruction to flow (up to DN 300).
  • Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and drop-tight shut-off.
  • Body locating holes allow ease of installation and centering between the flanges.
  • Extended body neck allows for pipe insulation.
  • Top and bottom shaft bearings for optimized support and minimum friction and decreased torque.
  • Top bushing absorbs actuator side thrust loads.
  • All valves comply to Pressure Equipment Directive (97/23/EU) Module B1 + D, CE Marking.
  • Available approvals: KIWA, ABS, WRAS. ACS, NSF/ANSI STD 61.

General Application: Water, air, dry bulk conveying etc. These valves are for any service where a drop-tight shut-off with maximum flow area is required.

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