A dosing pump is a special volumetric pump used to transport liquids, especially corrosive liquids. The flow can be adjusted steplessly in the range of 0-100%. The dosing pump is also called a quantitative pump or a proportional pump. The dosing pump belongs to the reciprocating positive displacement pump. It is used for precise metering. Usually, the stability accuracy of the dosing pump is required to be no more than ±1%. With the continuous development of modern industry towards automatic operation and long-distance automatic control, the advantages of dosing pumps are particularly prominent because of their strong compatibility and adaptability to a wide range of media (liquids).