In modern manufacturing workshops, central hydraulic stations are widely used to supply multiple machines, including presses, stamping equipment, press brakes, and various clamping or lifting systems.
This centralized approach simplifies infrastructure by sharing oil tanks, cooling systems, and filtration units. However, in real-world operation, several recurring issues often emerge.

Industry Context: Typical Pain Points in Central Hydraulic Stations

While centralized systems improve layout efficiency, they also introduce operational challenges:

Energy consumption increases continuously, even when some machines are idle, because pumps and motors remain running to maintain system readiness

Noise accumulates in the hydraulic room, often becoming the loudest area in the workshop and affecting operator comfort

Troubleshooting becomes complex, as unstable pressure or flow may originate from the power unit, a specific machine, or the piping system

These issues indicate that system-level design, rather than individual component optimization, is the key to improvement.

Core Approach: Standardize the Pump Platform First

An increasing number of engineers are adopting a structured approach:

Standardize the pump platform, then optimize energy efficiency and noise control

By unifying the hydraulic power source, the system becomes easier to control, expand, and maintain.

Solution Platform: FG / FG21 Internal Gear Pump Family

The FG / FG21 high-pressure internal gear pump series provides a scalable platform suitable for central hydraulic stations.

Pump Range for Different Circuit Sizes

FG0: approximately 3.8–24 mL/r for small circuits such as clamping units

FG1: 25–63.7 mL/r for main machine groups including presses and press brakes

FG2: 64.7–162.8 mL/r for large tonnage systems or multi-machine clusters

This modular structure allows a single pump family to cover the full range of system requirements.

Pressure and Speed Capabilities

Rated pressure: 31.5 MPa
Maximum pressure: up to 35 MPa
Speed range: 200–3000 r/min

These parameters support high-load applications while remaining compatible with servo motors and VFD systems.

FG21 Dual Pump Configuration

FG21 dual pumps enable separation of different hydraulic functions at the source level:

Main high-pressure cylinders
Auxiliary circuits such as clamping, tilting, and tool movement

This separation improves system control and reduces interference between circuits.

Performance Improvements in Operation

After implementing a standardized FG / FG21 pump platform, central hydraulic stations typically show clear improvements.

Energy efficiency improves because the system no longer requires full-flow standby; speed control ensures that only active circuits operate

Noise levels decrease due to reduced pulsation and smoother flow characteristics, minimizing vibration and resonance in long pipelines

Troubleshooting becomes more efficient, as engineers can isolate issues to specific pump segments, circuits, or machines

Engineering Value: From Component Upgrade to System-Level Optimization

Using FG / FG21 as a unified pump platform does more than replace a conventional pump.

It establishes a scalable and maintainable hydraulic architecture that supports:

Flexible system expansion
Better energy management through speed control
Clearer fault isolation and faster maintenance response

Summary

For central hydraulic stations supplying multiple machines, the key to optimization is not only component selection but system structure.

By standardizing the pump platform with FG / FG21 internal gear pumps, manufacturers can achieve:

Lower energy consumption
Reduced noise and vibration
Improved system diagnosability
More stable long-term operation

This approach transforms the hydraulic station from a passive power unit into an efficient and controllable system foundation.