利用齿轮减压器的优点实现低扭矩的顺利操作，将1/4转阀门操作转变为一个圆形手柄的多转手动操作。在1/4转阀门上应用齿轮操作机构的其它优点还有：防止阀门突然地关闭或开启，因此防止管道系统避免液压冲击。与直接手动定位相比，节流控制更加可靠。由于随着阀门通径的增加，旋转扭矩也随之增加，因此对于DN250通径的类型C蝶阀的手动操作来说，齿轮操作机构是一种标准配置。这种通径不配置杠杆手柄。但是，对于其它所有通径的蝶阀，齿轮操作机构只是作为选配附件提供，这点和其它具有各种特殊功能的选配件相同。请参阅下表。此外，最小的的齿轮操作机构可以安装在Tru-Bloc球阀上。这些组件可以在本页底部的的表格中找到。最后，齿轮操作机构可以安装在用于1/4转阀门的所有阀杆加长件的外部支撑板上。
Provides smooth low-torque operation by virtue of a gear reducer, which converts multiturn manual operation of a round handle into quarter-turn valve operation. Additional benefits of applying a gear operator to a quarter-turn valve are: Sudden closing or opening of the valve is prevented, thus protecting the piping system from hydraulic shock. Throttling control is far more reliable than direct manual positioning. Because of increased turning torque with valve size, a gear operator is standard equipment for manual operation of the 10” Model-C Butterfly Valve. No lever handle is available. However, gear operators are available as an accessory for all other sizes of butterfly valves, along with an assortment of special-use options. See the table below. Also, the smallest gear operator may be mounted on the Tru-Bloc Ball Valve. Those kits may be found in the table at the bottom of this page. Finally, gear operators may be munted on the external support plate of all stem extensions for quarter-turn valves. | | 
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