链轮操作组件
Chainwheel Operator Kits

　　对于对夹式蝶阀，将型号中的“CO”前缀用“COW”替换。
　　For Wafer Style Butterfly Valves replace the "CO" prefix with "COW" in the part number.

• 螺栓紧固的转换装置，可用于所有美国斯毕尔公司的蝶阀。包括用于直接安装到阀门上的所有五金件。
  Bolt-on conversion unit for all Spears® Butterfly Valves. Includes all hardware for direct mount to valve.
• 使得能够操作在很高的、通常很难够着的位置上的美国斯毕尔公司蝶阀。通过轻轻拉链轮环链就能够轻易地开启或关闭阀门。
  Enables operation of Spears® Butterfly Valves in high, normally out of reach locations. Makes valve opening or closing easy by means of a slight pull on the sprocket chain.
• 这种装置由铝铸件的高效齿轮操作机构配置铝合金链轮环和链条导轨组成。
  Unit consists of Cast Aluminum high efficiency Gear Operator with Aluminum Alloy Sprocket Rim and Chain Guide.
• 可提供316不锈钢，热浸镀锌钢或黄铜三种不同材质的链条供选择。需要另行订购所需要的长度。
  Chain options provide choice of 316 Stainless Steel, Hot-Dipped Galvanized or Brass. Order separately to desired length.

  　　注：在水平安装系统中，链轮操作机构通常应该将操作机构安装在阀门（逆止阀）下方，以保证链条和系统管道之间有足够的空间。在将操作机构安装在顶部位置之前，请检查确认是否有适当的操作空间。
  　　Note: In horizontal system installations, Chainwheel Operators should be generally mounted with operator below valve (inverted valve) to maintain clearance between chain and system piping. Check for adequate clearance before installing an operator in a top-mount position.

计算地面到链轮的高度
Determining Floor-to-Chainwheel Height

　　图片所示的典型安装用于水平管道系统安装的阀门。地面到链轮高度的计算方法是从系统中心高度减去“C”尺寸（如果采用顶部安装方式，则需加上“C”）。在垂直管道系统安装中，地面到链轮的高度与系统中阀门的中心位置相同。
　　Typical orientation is shown for valve in horizontal piping system installation. Floor-to-Chainwheel height is determined by subtracting the specified "C" dimension from the system centerline height (add "C" dimension if used with top-mount orientation). In vertical piping system installations, the Floor-to-Chainwheel height is the same as that for the centerline location of the valve in the system.