Industry Background

In industrial lubrication systems and oil transfer applications, maintaining stable flow and pressure is often more challenging than it appears.
Unlike hydraulic systems that operate under defined load cycles, lubrication systems must run continuously, often handling oils with varying viscosity and temperature conditions.

In many factories, centralized lubrication systems and oil circulation units face several recurring issues:

Flow instability when viscosity changes due to temperature fluctuations

Insufficient pressure when pipelines are long or resistance increases

Excessive noise and vibration during continuous operation

Difficulty in balancing flow demand across multiple lubrication points

These problems directly affect equipment reliability and maintenance cycles.

Technical Challenge: Matching Flow, Pressure and Viscosity

Lubrication systems differ from general hydraulic applications in one key aspect:
they must handle a wide range of oil viscosities while maintaining consistent delivery.

Typical system requirements include:

Flow rates ranging from 10 to 100 L/min depending on system scale

Working pressure between 2.5 MPa and 4.0 MPa to overcome pipeline resistance

Viscosity range from 10 cSt to 1000 cSt, especially in heavy oil or cold-start conditions

Under these conditions, pump selection becomes critical to system stability.

Solution Approach: IGH Internal Gear Pumps for Lubrication and Oil Circulation

To address these challenges, IGH internal gear pumps are widely used in industrial lubrication systems.

Their design characteristics provide a balanced solution for flow stability, pressure capability, and viscosity adaptability.

Typical performance parameters include:

Flow range 10–100 L/min

Pressure range 2.5–4.0 MPa

Speed 1450 r/min

Viscosity compatibility 10–1000 cSt

These parameters allow IGH pumps to operate effectively in both light and heavy oil applications.

Practical Configuration and Selection

In real applications, engineers typically select models based on system scale and oil characteristics:

Small lubrication systems and compact equipment often use IGH-25 or IGH-40

Centralized oil circulation systems commonly use IGH-60

Heavy-duty oil transfer applications with higher flow demand use IGH-80 or IGH-100

Material selection is also adjusted based on oil type, including cast iron for general oils and stainless steel or bronze for special applications.

Implementation Benefits

After adopting IGH internal gear pumps, industrial lubrication systems show measurable improvements:

More stable oil flow even under changing viscosity conditions

Consistent pressure delivery across long pipelines

Reduced noise and smoother operation during continuous duty

Improved reliability of lubrication points and reduced maintenance frequency

These improvements contribute to longer equipment life and more predictable operation.

Summary

In lubrication and oil transfer systems, pump selection must consider not only flow and pressure, but also viscosity adaptability and continuous operation stability.

IGH internal gear pumps provide a practical solution by combining stable flow output, moderate pressure capability, wide viscosity compatibility, and reliable continuous operation.

This makes them well suited for centralized lubrication systems and industrial oil circulation applications.