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Asahi Type 57 & 56 Plasgear Gear Operator


Description

The name of this valve comes from the wing-like action of the flow-controlling disc, which operates at right angles to the flow. The disc has about the same diameter as the connecting pipe, and the flow is straight through, with a low pressure drop. Maintenance is easy due to the small number of moving parts. The butterfly valve can be used either as an on/off or modulating type of valve. Asahi/America has recently developed the advanced Type 57 valve, which has no metal to media or environment contact whatsoever. These valves may be operated manually, electrically, or pneumatically.

New Design Features

  • Flange Stopper- Prevents over compressing liners due to improper installation
  • Absorption Channel- Never worry about an over-tightened liner causing excessive stem torque
  • Spherical Disc- Gain higher Cv and extended valve life cycle as a result of new disc design
  • Plasgear Plastic Gear Operator - The first industrial non-metallic gear box-offers superior corrosion resistance.

Materials
        Sizes: Lever: 1-1/2" - 8"
        Gear: 8" - 16"
        Models: Wafer style
        Operators: Lever and gear
        Bodies: PVC, PP and PVDF
        Discs: PVC, PP and PVDF
        Seats: EPDM or FKM. Also: Nitrile, Butyl, and Neoprene
        Seals: Same as seating material
        Stems: 403 and 316 stainless steel, titanium,
 Hastelloy C®, etc.


Features and Benefits

  • Composite Plastic Gear Box Housing provides superior corrosion resistance
  • Standard on all Type 57 and Type 57L Butterfly Valves or supplied individually
  • Available for Valve Sizes:
    • 1½" - 14" Type 57 Butterfly Valves
    • 3" - 12" Type 57L Butterfly Valves
    • 16" Type 56 Butterfly Valves
  • Ability to be mounted on most standard plastic or steel butterfly valves of the appropriate size 
  • Visible PP position indicator
  • NAMUR mounting dimension that allows for mounting of accessories
  • Plastic PPG reinforced hand wheel
  • Integral grip design that allows for easy operation
  • Adjustable travel stop for both open and close position 

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