The self-priming ability of the gear pump exists but has limitations. In practical applications, it is necessary to fully consider various influencing factors and take corresponding measures to improve its self-priming performance to meet specific work requirements.

The gear pump has the working characteristics of strong suction capacity, continuous and uniform liquid supply, simple and compact structure, reliable operation, good lubrication performance and wide range of applicable media. These characteristics make gear pumps have broad application prospects in the field of liquid transportation.