What are the various classifications of pumps?

There’s a problem with your classification :lol

As far as I know, pumps can be classified into centrifugal and positive-displacement types based on their principle of operation. Most are centrifugal pumps, while positive displacement pumps include gear pumps, screw pumps, plunger pumps, pneumatic pumps, etc.! I hope this helps you. The key to selecting a pump is to understand the operating conditions first, and then choose the appropriate pump

As a supplement, there are some other peculiar types that don’t fall into this category, such as jet pumps and vortex pumps, which need to be classified separately

Pumps can be classified by structure into: positive-displacement (reciprocating, rotary) and vane-type centrifugal (axial flow, mixed-flow, radial flow)

It’s different; there are various classifications based on different principles.

Based on the working principle and structure of pumps, pump types are classified into vane pumps and positive displacement pumps, as well as other types of pumps. Vane pumps include: centrifugal pumps, vortex pumps, mixed-flow pumps, and axial flow pumps. Centrifugal pumps include: single-suction pumps, double-suction pumps, single-stage pumps, multi-stage pumps, volute pumps, segmented pumps, vertical pumps, horizontal pumps, canned pumps, magnetically driven pumps, and high-speed pumps. Vortex pumps are divided into: single-stage pumps, multi-stage pumps, and centrifugal vortex pumps. Positive displacement pumps are divided into reciprocating pumps and rotary pumps. Reciprocating pumps are divided into electric pumps, and electric pumps are further classified into plunger (piston) pumps, diaphragm pumps, and metering pumps. Rotary pumps are divided into: gear pumps, screw pumps, Roots pumps, and vane pumps. Other types of pumps include: jet pumps, air lift pumps, and electromagnetic pumps.