Selecting the right internal gear pump is essential for ensuring stable oil supply, system efficiency and long-term reliability.
A structured selection process helps match pump performance with actual operating conditions in hydraulic and lubrication systems.

Key Selection Parameters

Selection Logic

A practical selection process can be simplified into several key steps.

First, define system pressure and flow requirements
These two parameters determine the basic pump size and performance level

Second, verify oil compatibility
Check viscosity range and fluid properties to ensure stable operation and avoid excessive wear

Third, evaluate installation conditions
Consider available space, mounting type and piping layout to ensure proper integration

Fourth, match the drive system
Ensure compatibility with electric motors or other drive configurations for stable operation

Fifth, select materials and seals
Choose appropriate materials based on temperature, corrosion level and sealing requirements

Engineering Considerations

Proper selection should also consider:

Pressure margin to ensure stable operation under load fluctuation

Low noise and low pulsation for improved system performance

Thermal adaptability for continuous or high-temperature operation

Maintenance accessibility for long-term reliability

Summary

A well-selected internal gear pump ensures stable flow, reliable pressure output and efficient system performance.

By matching flow, pressure, oil properties and installation conditions, engineers can significantly improve system stability, reduce maintenance and extend equipment life.