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An O-ring is required to be installed between the split pump shaft and the shaft sleeve. There is a gap between the shaft and the shaft sleeve. The O-ring is generally used as a static auxiliary seal in the water pump. Many static seals in the water pump rely on For the sake of safety, an O-ring is added to assist the sealing. For example, the seal between the middle sections of a multi-stage pump is basically such a structure. If the O-ring is not added, leakage will occur. All O-rings or gaskets should be added for sealing.
The O-ring is mainly used for sealing. For cooling water, the O-ring is generally used as the main seal. As for the quantity, the number of pumps varies with the structure.

The O-ring is installed between the split pump shaft and the shaft sleeve. The main function is to realize the seal between the shaft and the shaft sleeve. The reason is that most mechanical seals must have flushing fluid for end surface lubrication and cooling, and some of them are external liquid. Some are the medium water drawn from the water pump outlet, this part of the medium water is filled in the pump chamber, in order to facilitate the overall installation between the pump shaft and the bushing, clearance fit is generally used, if there is no O-type installed between the shaft and the bushing If the sealing ring is used, the flushing fluid or pump medium will leak out of the pump from the ring gap, causing pollution to the site environment.