Pumps for extraction/pressurization/pressure reduction are commonly used fluid transfer devices in industrial processes, mainly categorized into centrifugal pumps, plunger pumps, and diaphragm pumps. Centrifugal pumps are suitable for high-flow, low-pressure applications, plunger pumps are ideal for high-pressure, precise delivery, and diaphragm pumps excel at handling corrosive media. Key parameters include flow rate (1-1000 m³/h), pressure (0.1-40 MPa), and material (stainless steel/engineering plastics).