Floor stands are available in a number of sizes , and the size to be used depends on the stem size and stem load of the valve 地轴架适用于许多通径的阀门,其尺寸大小取决于阀杆尺寸和阀杆的负载。
The floor stands are available in a number of sizes , and the size to be used depends on the stem size and stem load of the valve 有多种尺寸的地轴架可供选择,选择地轴架主要根据阀门的阀杆尺寸和阀杆负载。
All units , whether installed directly on a valve or on a floor stand , can be manually operated in case of power failure 所有装置,无论是直接安装在阀门上,或安装在地轴架上,都可以在电力中断的情况下进行人工操作。
All units , whether installed directly on a valve or on a floor stand , can be manually operated in case of power failure 所有装置,无论是直接安装在阀门上,还是安装在地轴架上,都可以在出现电力故障时,进行手动操作。
They are divided into two main classes : one class with handwheels but no gearing , and the other class with cranking actuators and worm gearing or worm and spur gearing combined 这些地轴架分为两大类:一类配置手轮,没有齿轮执行机构;另一类配置转动曲轴执行机构和蜗轮或蜗轮和凸轮组合执行机构。