CYZ-A self-priming centrifugal pump is a new pump product developed based on the digestion, absorption and improvement of relevant technical data at home and abroad. It is an ideal product for the petroleum industry, land oil depots and oil tankers, and is suitable for marine cargo pumps, bilge pumps, fire pumps, ballast pumps and machine cooling water circulation, respectively delivering gasoline, kerosene, diesel, aviation kerosene and other petroleum products as well as sea water and clean water, The medium temperature is - 20 ℃ - 80 ℃. If the chemical liquid is transported, the corrosion resistant mechanical seal can be used instead.