Some users prefer centrifugal pump because the centrifugal pump is higher than the liquid level, and the liquid cannot flow into the pump body at all. In this case, the centrifugal pump is not started to start directly. This operation method is not correct. Let me talk about why you need to fill the water before the centrifugal pump starts.
The reason why the centrifugal pump should be filled before starting 1: the seals of all kinds of pipeline pumps are mainly sealed by mechanical seals or packings. These two seals must be cooled by liquid lubrication, otherwise the seals will be caused by dry grinding. The temperature of the dry mill rises and the seal is burned out, causing the seal pump to leak water after the pump is sucked up.
The reason why the centrifugal pump should be filled before starting 2: The centrifugal pump can suck the water when the working liquid level is lower than the centrifugal pump. Therefore, the purpose of the water pump before the centrifugal pump starts is to discharge the pump inside the centrifugal pump. The air can also act as a drainage, which helps the centrifugal pump to suck the liquid smoothly.
The reason why the centrifugal pump should be filled before starting 3: The reason is that the gap between the impeller of the ISW horizontal centrifugal pump and the pump body of the centrifugal pump is very small. If the water is not easily filled before starting, the friction between the two components is easy to occur. It is easy to cause mechanical failure, which can easily lead to damage to various parts of the pump.
