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Keystone Series GR Resilient Seated Butterfly Valves GRW/GRL

Keystone Series GR Resilient Seated Butterfly Valves GRW/GRL



Keystone Series GR Resilient Seated Butterfly Valves GRW/GRL

A heavy duty industrial resilient seated butterfly valve

  • GRW - Wafer body design
  • GRL - Lugged body design

Features:

• Wafer and lugged body design with face-to-face dimension, 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 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.
• 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/ NPS 12).
• 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 (2014/68/EU) Module B + D,
CE Marking.
• Available approvals: NSF/ANSI 61, ACS,KIWA, WRAS, DVGW-G, ABS, CU-TR.