管路法兰与泵口要同心，偏差不能超过法兰螺栓孔尺寸公差。
As a general rule, piping flanges should be concentric to pump nozzles to within the flange bolt hole clearance tolerance.
阀门也可以配置法兰螺栓孔，用于贯穿式螺栓，但不能穿过阀腔区域。
Valves can also be furnished with flange bolt holes drilled for through bolting, except in the chest area.
注意！严禁用减速机输出传动法兰上的螺栓孔起吊减速机。
Caution: it is prohibited to lift the gear reducer with bolt holes on output drive flange.
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