In metallurgical production lines, hydraulic stations rarely operate under controlled or ideal conditions.
High temperature, dust, vibration, oil mist, and irregular maintenance intervals are common, making oil cleanliness difficult to maintain at standard levels.

Industry Context: Real-World Constraints vs Ideal Design Assumptions

Even with filtration systems installed, maintaining “laboratory-level” oil cleanliness is challenging in metallurgical environments.

Typical issues observed with conventional high-pressure pumps include:

Premature wear and increased internal leakage, reducing the ability to reach design pressure

Particle contamination entering tight clearances, causing sticking, scoring, or seizure

Frequent adjustment of filtration systems to protect the pump, leading to higher clogging risk and maintenance complexity

These factors often result in unplanned shutdowns and unstable system performance.

Core Requirement: Stability Under Contamination and Continuous Load

For metallurgical applications such as continuous casting reduction, shearing, and coiling, hydraulic systems must:

Maintain stable pressure under heavy load
Operate reliably with non-ideal oil cleanliness
Withstand frequent pressure fluctuations and shock loads

This requires a pump design that prioritizes durability and tolerance, not just peak efficiency under ideal conditions.

Solution Platform: FG2 High-Pressure Internal Gear Pumps

To address these challenges, many metallurgical lines are adopting FG2 internal gear pumps as their main hydraulic power source.

Key Technical Parameters

Displacement: approximately 64.7–162.8 mL/r
Rated pressure: 31.5 MPa
Maximum pressure: up to 35 MPa

This range supports the “high pressure + medium to large flow” requirements of casting, shearing, and coiling processes.

Structural Advantages

Simplified internal gear structure with strong wear resistance

Lower sensitivity to oil contamination compared with pumps that rely on very tight clearances

Low pulsation output, improving stability in long-piping, multi-cylinder systems

With proper but not excessive filtration, FG2 pumps can operate reliably under real metallurgical oil conditions.

Performance Improvements in Practical Operation

After switching to FG2 pumps, metallurgical engineers typically observe two key improvements.

More Predictable Maintenance Intervals

FG2 pumps maintain stable performance even under moderate contamination levels

Maintenance can follow planned shutdown schedules rather than being driven by unexpected pump failures

Smoother Pressure and Motion Control

Pressure fluctuations during casting reduction, shearing strokes, and coiler tension control are reduced

System response becomes more stable, allowing engineers to focus on process quality rather than compensating for hydraulic instability

Engineering Value: Designed for Harsh Environments, Not Ideal Conditions

FG2 pumps do not rely on ideal operating conditions to perform effectively.

Instead, they provide a hydraulic solution that is:

Compatible with contaminated oil conditions
Capable of handling continuous heavy-duty operation
Stable under frequent pressure variation

Summary

For metallurgical hydraulic systems operating in high-temperature, high-contamination environments, pump selection must reflect real working conditions.

FG2 internal gear pumps offer:

High pressure capability for heavy-duty applications
Tolerance to oil contamination under practical filtration
Low pulsation for improved system stability
More predictable maintenance and reduced downtime risk

Rather than requiring the system to behave like a laboratory, FG2 pumps are designed to match the realities of continuous casting, shearing, and coiling operations.