Self-priming centrifugal pump is used to transport petrol, kerosene, diesel, aviation kerosene and other petroleum products. The medium temperature is -20 ℃ ~ +80 ℃, it is an excellent marine loading and unloading pump and is suitable for land oil depot, tank truck, etc. Oil storage device oil transportation. Can also be used to transport sea water, fresh water and so on. Self-priming centrifugal pump is a self-priming centrifugal pump, with simple structure, easy operation and maintenance, stable operation, large displacement, rural high, easy to adjust, the use of a wide range of features. Self-priming centrifugal pump with axial back to the pump body structure, the pump from the suction chamber, liquid storage chamber, vortex chamber, back to the liquid hole, gas-liquid separation chamber, etc. Pump bearings using single row radial ball bearings. In the bottom of the pump bearing body is provided with cooling chamber, the pump internal high, low pressure zone seal ring shaft end mechanical seal. CYZ self-priming centrifugal pump is a self-priming centrifugal pump series. The utility model has the advantages of simple structure, convenient operation and maintenance, stable operation, large displacement, high efficiency, easy adjustment, strong self-priming capability and wide application range. Uses: CYZ self-priming centrifugal pump used to transport gasoline, kerosene, diesel, aviation kerosene and other petroleum products. Medium temperature -20 ℃ ~ +80 ℃, is an excellent marine loading and unloading pumps, can be double as sweeping the pump. And for land oil depot, tankers and other oil storage device oil transportation. Can also be used to transport seawater, fresh water and so on. Structure type: CYZ self-priming centrifugal pump with the same pump back to the pump body structure, the pump from the suction chamber, the liquid chamber, the vortex chamber, return hole, gas-liquid separation chamber and other components. Pump bearings using single row radial ball bearings. In some pumps the bottom of the bearing body with cooling chamber. Pump internal high, low pressure zone seal ring. Shaft end with mechanical seal.