步骤2：执行器代码选择
　　Step 2: Actuator Code Selection
　　美国斯毕尔公司执行机构阀门可提供电动执行器或气动执行器。选用适当的操作扭矩和循环时间，使执行器与阀门的种类和通径相匹配。选择附加的执行器附件并按照步骤3的说明在工厂安装成执行机构阀门组件包。
　　Spears® actuated valves are available with either electric or pneumatic motors. Actuators are pre matched to each type and size of valve with proper operating torque and cycle time. Additional actuator accessories are selected and are factory installed on the Actuated Valve Package in Step 3 instructions.
　　从电动执行器（选择表4）或气动执行器（选择表5）中选择可适用的备选件，然后在组件包型号中填入指定的执行器代码。
　　Select the applicable options from either the Electric Actuators (Selection Table 4) or Pneumatic Actuators (Selection Table 5) and enter the designated Actuator Code portion of the package part number.

　　表4：电动执行器
　　Table 4: ELECTRIC ACTUATORS
　　（电压 - 外壳标准 - 强制手动操作装置 - 工作循环）
　　(Voltage - Enclosure Rating - Manual Override - Duty Cycle)

　　注释：
　　Notes:

1. 460伏交流电仅适用于蝶阀。
   460 VAC available on Butterfly Valves only.
2. 仅限于刹闸和指示器开关，型号不允许有任何选项（必须是Z000, Y000, 或X000）
   Bracket & Indicator Switch Only part numbers do not allow any other options (must be Z000, Y000, or X000)
3. 标准工作循环根据阀门的种类和通径而有所不同，如下表所示。标准工作循环只能够升级。注：50%工作循环只能够配置在非标、特殊订购的执行器上。
   Standard Duty Cycles vary according to valve type and size as indicated in chart below. Standard Duty Cycles can be upgraded only. Note: 50% duty cycle available on non-standard, special order actuators only.

4. 对于通径DN15 ~ DN80球阀，基本强制手动操作装置是标准配置，而分离式强制手动操作装置是备选件。
   Basic Manual Override is standard on Ball Valve sizes ¹/₂" - 3" with Declutchable Manual Override as an option.
   对于通径DN100及以上的球阀和所有蝶阀，分离式强制手动操作装置是标准配置。
   Declutchable Manual Override is standard on Ball Valve sizes 4" & larger and all Butterfly Valves.
   标准配置的闸阀和隔膜阀组件包都没有强制手动操作装置，分离式强制手动操作装置是作为备选件。弹簧复位不适用于电动隔膜阀。
   Standard Gate Valve and Diaphragm Valve packages have no override with Declutchable Manual Override as an option. Spring return not available on electric Diaphragm valves.
5. 电动弹簧复位执行器标准配置不含强制手动操作装置。针对每项应用，需要确认所需的是分离式强制手动操作装置还是基本强制手动操作装置。
   Electric Spring Return Actuators come standard with no type of override. Need to verify if either Declutchable Manual Override or Basic Manual Overrides are available in all applications.