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    Model Alga

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    產品名稱: Model Alga
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    簡單介紹

    Model Alga Double acting pneumatic quarter-turn actuator for output torques to 248,500 Nm.雙氣動輸出扭矩回轉執行器248500牛米

    Model Alga的詳細介紹

    Model Alga
    Double acting pneumatic quarter-turn actuator for output torques to 248,500 Nm.雙氣動輸出扭矩回轉執行器248500牛米

    Model Alga

    • Description
    • Specifications
    • Documentation
    Biffi Actuators & Controls, Pneumatic Actuators, Quarter Turn, Alga DA Pneum Act - Scotch Yoke Design

    Double acting pneumatic quarter-turn actuator for output torques to 248,500 Nm.

    Features & Benefits:

    • Scotch yoke design generates high break torque needed for the actuation of many quarter-turn valves.
    • Six bearings provide reliability, smooth operation and extended service life:
    - Two bronze yoke bearings ensure minimal friction. - Two bronze sliding block bearings spread load over large surface area. - Guide block bearing and piston rod bearing of sintered bronze impregnated with PTFE increase efficiency, reduce maintenance and prolong actuator life.
    • Graphite-impregnated PTFE piston bearing reduces friction between the piston and cylinder bore and allows the cylinder to be operated without lubrication.
      • Guide bar supports the transverse forces and insures proper support of the piston rod. Hard chrome plating on guide bar provides corrosion resistance and minimal friction loads.
        • Chrome-plated piston rods provide maximum corrosion resistance and minimal friction loads on dynamic seals.
        • Electroless nickel-plated cylinder bore provides maximum corrosion resistance and reliability.
        • Multiple external tie bar design provides maximum cylinder integrity.
        • Totally enclosed, weatherproof carbon steel housing provides maximum strength. Internal coating protects against corrosion.
        • External travel stops allow precise adjustments of ± 4° rotation at each end of travel.
        • Low hysteresis and high response enhance modulating service.
        • Available with canted or with symmetric scotch yoke mechanism to suit the valve characteristics.
        • Special coatings for offshore or corrosive environments.
        • Special version available for use with sour gas supply.
        • ATEX certified II 2 G D
           
    Specifications
    Technical Data    
    Supply pressure       :   1.5 to 10.5 bar
    Supply medium       :   air, nitrogen or sweet gas
    Output torque       :   to 248,500 Nm
        Ambient temperature
        standard range : -30°C to +100°C
        (-20°F to +210°F)
        optional ranges : -55°C to +150°C
        (-65°F to +300°F)

     
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