As an emergency pump, its effectiveness is more prominent in industrial and agricultural production, emergency rescue, such as drainage and firefighting. The BZ type pump is widely used for urban water supply in industrial sectors such as petroleum, chemical, metallurgical, mechanical, chemical fiber, food, energy, transportation, and can also be used for agricultural drainage and sprinkler irrigation. For conveying clear water or other liquids with viscosity less than 5 ° E and temperature below 80 ° C that have physical and chemical properties similar to clear water