Due to various reasons, a small number of users have left the pump unused for a long time after purchasing it. During the installation and use of the new pump, they follow the instructions in the user manual to fill the water first and then start the pump without any idling phenomenon. However, water leakage occurs as soon as the pump is started. The leakage of the pump that has not been used for a long time is actually caused by the lack of liquid in the pump body. The rubber parts of the mechanical seal have been in contact with the atmosphere for a long time, causing oxidation reaction between the rubber parts and the pump shaft. Before use, the rubber of the motor fan blades is separated from the pump shaft by not manually turning them, and the motor has too much pulling force at the moment of starting, resulting in rubber breakage and mechanical seal leakage. Phenomenon, So it should be noted that if the self-priming pump has been parked without liquid for more than one month, it is advisable to turn the pump shaft before starting it again. It should also be noted that self-priming pumps are prohibited from working without liquid. The solution is to only replace the mechanical seal components with new ones.
The above reasons for water leakage in pumps that have not been used for a long time are only applicable to self-priming pumps or other centrifugal pump products. If it is a sewage pump product, such as a submersible sewage pump, and the mechanical seal components are lubricated with oil, there is no need to consider it. The above conclusion can be drawn from the time when the self-priming pump is filled with water. If it is a quality problem with the pump itself, water leakage will occur at the mechanical seal after filling
