2026 Scientific Selection System and Decision Logic for Screw Pumps
Three-Dimensional Selection Methodology: Precise Matching of Medium-Parameter-Series
1、Quantitative Analysis of Medium Characteristics
The primary task in pump selection is to clearly define the medium properties: viscosity (cP), temperature (°C), corrosiveness (pH value), solid content (%), abrasiveness, etc. This forms the basis for determining the material of the stator and rotor as well as the pump type.
2、Precise Calculation of Key Parameters
Clearly define the process requirements for flow rate (m³/h) and pressure (MPa). The flow rate of a screw pump is directly proportional to the rotational speed. A reasonable speed must be selected based on the medium viscosity to ensure efficiency and service life.
3、Scenario-Based Selection of Product Series
High solid content / sewage sludge: Choose a progressive cavity pump. Its unique structural design effectively conveys media containing large particles and fibers.
High pressure / lubricating oil transfer: Choose a three-screw pump. Its compact structure and low pressure pulsation make it suitable as a hydraulic power unit or for lubricating oil transfer.
Food-grade / hygienic requirements: Choose a progressive cavity pump that allows quick disassembly and cleaning, with materials compliant with food-grade standards.
Metering / precise dosing: Choose a metering-type screw pump capable of precise flow control.
