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.
注意：在泵排泄口，首选的止回阀是管内弹簧负载，带杠杆和压铁或杠杆和弹簧的旋启式止回阀。
Note: On pump discharge, the preferred check valves are an in-line spring loaded, swing design with lever and weight or lever and spring.
喷漆泵的吸口一定要加装全新的过滤网，吸口软管也要替换成新的。
Spraypump suction must be equipped with a new filter, suction hose is replaced with new one.
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