Maintenance of Automatic Self-Priming Peripheral Pumps

A. Rolling bearings: After prolonged operation, once the bearings are worn to a certain extent, they must be replaced.B. Front and rear seal rings: When the seal rings are worn beyond a certain degree, replacement is necessary.

C. Mechanical seal: Generally, the mechanical seal does not need to be disassembled for inspection if there is no leakage. If severe leakage occurs at the lower end of the bearing housing, the mechanical seal should be disassembled and inspected. During assembly and disassembly, handle the mechanical seal with extreme care, ensure the mating surfaces are clean, and protect the mirror surfaces of the stationary and rotating rings—knocking and collision are strictly forbidden. The primary cause of mechanical seal leakage is the roughening of the friction pair’s mirror surface. Repair method: Grind the end face of the friction pair to restore its mirror finish. Another cause of leakage in mechanical seals is improper O-ring installation or O-ring aging. In this case, replace the O-ring before reassembling.