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Add the Series GRF (ISO) Butterfly Valve to your store or catalog  
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Keystone Butterfly Valve, Series GRF (ISO)

Series GRF (ISO) Butterfly Valve

Brand: Keystone
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A heavy duty double flanged concentric design resilient seated butterfly valve.
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 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.

  • Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and drop-tight shut-off.

  • Extended body neck allows for pipe insulation.

  • Actuator flange according to ISO 5211.

  • Top and bottom shaft bearings for optimized support and minimum friction and decreased torque.

  • Top bushing absorbs actuator side thrust loads.

    • Specifications

    Brand

    Approvals & Certifications

    • SIL Capable, PED, DVWG, CUTR, CRN, ABS

    Body Design

    • Short Pattern

    Material

    • Super Duplex
    • Ductile Iron
    • Carbon Steel
    • Buna-N
    • Aluminum Bronze
    • 316L Stainless Steel
    • 316 Stainless Steel
    • 304 Stainless Steel
    • EPDM Rubber
    • Duplex

    Media

    • Water Glycol, Water, Liquid, Air, Inert Gas, Air

    Operating Temperature

    • Less than 150° C

    Pressure Class

    • ASME, PN

    Process Connection Type

    • 150 FF, 150 RF

    Seat / Seal Type

    • Resilient

    Shutoff Class

    • Zero Leakage

    Standards

    • API 609, ASME B16.34

    Valve Size

    • NPS 36, NPS 24 / DN 600, NPS 40, NPS 30, NPS 42, NPS 60, NPS 56, NPS 48, NPS 44

    Valve Size Standard

    • NPS, DN

    Valve Type

    • Butterfly

    Documentation

    Data Sheets

    Product Manuals

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