Below, we will discuss the operation of a self-priming pump and the correct installation steps.

　　How to operate a self-priming pump?

　　For ordinary centrifugal pumps, if the suction liquid level is below the impeller, water must be added in advance during startup, which is inconvenient. To store water in the pump, a foot valve must be installed at the inlet of the suction pipe. When the pump is working, the foot valve causes a large amount of hydraulic loss. A self-priming pump is one that does not require watering before startup; after a short period of operation, the pump itself can suck up the water and start normal operation.

　　1. If the pump has strong vibration and noise during operation, it may be caused by pump cavitation. There are two reasons for cavitation: one is excessive inflow, and the other is excessive suction range. When the flow rate is too high, the outlet control valve can be adjusted, and the pressure gauge reading can be increased. If the intake pipe is blocked, it should be removed in time. When the suction range is too large, the installation height of the pump can be appropriately reduced.

　　2. If the water temperature in the pump is too high, resulting in difficulty in self-priming, the pump can be temporarily stopped, and the water in the discharge pipe can be allowed to flow back into the pump, or a liquid storage port can be added to the pump body to directly replenish the water in the pump to cool the water in the pump, and then restarted.

　　3. When the pump is stopped for some reason during operation and needs to be restarted, the outlet control valve should be slightly opened (do not completely close it), which is conducive to the discharge of gas during the self-priming process and can ensure that the tip starts under lighter responsibility.

　　4. Pay attention to abnormal sounds and vibrations during rotation, and spot-check the self-priming pump to ensure the pump shaft direction is correct.

　　5. Pay attention to the readings of the pressure gauge and vacuum gauge. After startup, when the readings of the pressure gauge and vacuum gauge fluctuate for a period of time and show stability, it indicates that the pump is full of water and the normal liquid transfer operation begins.

　　Correct installation of the self-priming pump

　　Before installing the self-priming pump, a suitable concrete foundation should be made according to the basic dimensions of the self-priming pump, and the foundation bolts should be pre-embedded during the construction of the concrete foundation. The concrete foundation refers to large self-priming pump products; small self-priming pumps do not require a concrete foundation. When the outlet and inlet of the self-priming pump have dust covers, the dust covers should be removed and connected to the pipeline. It should be noted that if a fast-suction self-priming pump product is used, the outlet pipe must be vertically upward for 1 meter before turning, otherwise, the water in the pump body is easily drained during self-priming.

　　For easy maintenance and safe use, regulating valves should be installed on the inlet and outlet pipes of the self-priming pump, and a pressure gauge should be installed between the outlet valve and the pump to ensure that the self-priming pump can be used within the rated flow rate and head, thereby achieving normal operation of the self-priming pump and extending its service life. Before starting the self-priming pump, the pump shaft should be rotated, and water should be injected into the pump cavity to fill the pump cavity and achieve the purpose of venting. Check whether the pump is leaking, and whether the impeller has any friction or jamming. If there is friction or jamming, the pump should be disassembled to check the specific cause and solve the problem.

　　A self-priming pump is a self-priming centrifugal pump with advantages such as compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life, and strong self-priming ability. Do not install a foot valve in the pipeline; as long as the pump body has a fixed amount of drainage, it can work. Self-priming pumps made of different materials can be used for different waters.

　　Okay, I won't explain too much. See you next time, and have a nice day!