Classification and working principle of pumps according to structure

There are also many types of products involved in the standard of water pumps, including centrifugal pumps, metering pumps, screw pumps, reciprocating pumps, turbine pumps, submersible pumps, oil pumps, clean water pumps, pressure test pumps, vortex pumps, cryogenic pumps, vacuum pumps, Ci pump, molecular pump, gear pump, mud pump, corrosion-resistant pump, deep well pump, water ring pump, mixed flow pump, axial flow pump, boiler feed pump, submerged pump, injection pump, chemical process pump, non-blocking pump, Leak-free pumps, plastic pumps, fire pumps, and many more. Some of their names are classified according to the conventional classification methods of pumps, such as vane pumps, positive displacement pumps, etc., some are classified according to their uses, such as sewage pumps, sanitary pumps, etc., and some names are more arbitrary, such as diffusion pumps, liquid nitrogen pumps, etc. As long as there is the production of such products and there is a need to formulate standards, a new standard may be generated through certain application and approval procedures, but sometimes the content is quite overlapping and repetitive. In terms of domestic and foreign standards, there are more domestic standards than foreign standards. In general, there are many pump standards such as centrifugal pumps that are widely used and have a long history of product production (the total number of related standards for centrifugal pumps has reached more than 100), while the rapidly developing new pump standards such as non-leakage pumps less.