High-pressure internal gear pumps serve as the core oil supply component in hydraulic stations, providing stable flow and high-pressure oil to drive cylinders, motors and control valves.
Their performance directly affects system efficiency, stability and equipment lifespan.

A structured approach to installation, operation and maintenance is essential to ensure reliable performance under industrial conditions.

Installation and System Connection

Proper installation is the foundation of stable pump operation.

The pump should be securely mounted and correctly aligned with the motor or engine shaft to avoid vibration or misalignment

Oil inlet and outlet ports must be connected according to system design, with the inlet connected to the oil tank and the outlet to the hydraulic circuit

Flow direction must match the pump design; incorrect installation can lead to immediate performance issues or damage

Hydraulic Oil Selection

Hydraulic oil plays a critical role in pump performance and durability.

Select oil with appropriate viscosity based on operating temperature, commonly ISO VG 32 or 46

Ensure oil cleanliness using proper filtration to prevent contamination-related wear

Maintain consistent oil quality to support stable pressure and flow performance

Start-Up Procedure

Before starting the system, several checks are required.

Verify that the oil level is sufficient and all connections are properly tightened

Ensure there are no leaks in pipelines or joints

Start the system at low speed to allow the oil to warm up and reach a stable operating condition

Gradual warm-up helps improve efficiency and reduces mechanical stress

System Adjustment and Control

Stable system performance depends on proper pressure and flow control.

Adjust system pressure through control valves to match operating requirements

Avoid excessive pressure, which can increase wear and reduce system life

Use flow control valves to regulate actuator speed and ensure smooth motion

Daily Maintenance

Routine maintenance is essential for long-term reliability.

Regularly check oil condition and replace it according to maintenance schedules

Monitor pump operation for abnormal noise, vibration or temperature rise

Clean filters and oil tanks to maintain proper oil circulation

Inspect seals and connections to prevent leakage

Shutdown Procedure

Proper shutdown helps protect system components.

Stop the pump by turning off the drive system

Release system pressure to bring the hydraulic circuit to a safe, no-pressure state

Ensure the system is ready for the next operation cycle

Summary

Reliable operation of a high-pressure internal gear pump depends on proper installation, correct oil selection, controlled operation and consistent maintenance.

By following these practices, hydraulic systems can achieve stable performance, longer service life and reduced maintenance costs.