How to Maintain Clean Hydraulic Oil for Reliable Systems

Hydraulic oil filters are essential industrial equipment, used to remove moisture, gas, and solid impurities from hydraulic oil. Maintaining oil cleanliness ensures stable, efficient, and long-lasting operation of hydraulic systems.

Hydraulic oil filters are widely used in various industries involving hydraulic transmission. The following is a detailed overview of their main application areas.

Core Industrial Applications

1. Manufacturing

Injection molding and die-casting machines: Maintain precision valve sensitivity and prevent defects caused by oil degradation.

Machine tools (CNC machines, grinders, milling machines): Ensure hydraulic oil cleanliness, ensuring machining accuracy and operational stability.

Presses and stamping equipment: Handle large volumes of oil. In-line filtration reduces maintenance costs and extends oil life.

2. Power Generation

Power plants (steam turbines, electric heating systems): Require strict oil cleanliness and water control to protect critical equipment.

Hydraulic power plants: Used for turbine speed control and hydraulic valve systems.

Nuclear power plants: Support auxiliary hydraulic systems, where reliability and safety are critical.

3. Construction Machinery

Excavators, loaders, cranes, and pump trucks: These operate in harsh, dusty environments; filtration prevents frequent oil failures.

Shield tunnel boring machines: Large hydraulic systems require continuous filtration to ensure uninterrupted operation.

4. Metallurgy

Steelmaking and rolling mills: Continuous casting machines and furnace systems operate in high-temperature, dusty environments, making filtration crucial for production stability.

Transportation Industry

1. Shipping

Protecting hydraulic systems in steering gears, cranes, and hatches.

Portable oil filters are particularly useful for onboard maintenance.

2. Aerospace

Purifying hydraulic oil in ground support equipment, such as aircraft maintenance platforms and refueling systems.

3. Railways

Filtering hydraulic oil in locomotive systems and railway maintenance machinery, such as tamping machines and bridge erection machines.

Other Key Applications

1. Mining Machinery

Hydraulic supports and excavators are subject to water and dust contamination. Filters ensure reliability and worker safety.

2. Petrochemical Industry

Used to clean hydraulic and lubricating oil systems in refineries and chemical plants.

Removes impurities, moisture, and acidic byproducts of oil degradation.

3. Military Applications

Maintains hydraulic systems in vehicles, radar units, missile launchers, and other mission-critical equipment.

4. Test Rigs

Provides ultra-clean pressurized oil for testing pumps, valves, and hydraulic cylinders.

Summary: Main Uses of Hydraulic Oil Filters

Hydraulic oil filters perform four essential functions across a wide range of industries:

New Oil Filtration: Removes contaminants from fresh oil before it is re-injected into the hydraulic system.

In-Line Filtration: Operates in bypass mode, continuously circulating and purifying the oil while the equipment is operating.

Periodic Maintenance: Reduces costs and extends oil life by regularly cleaning the oil instead of traditional oil changes.

Fault Recovery: Restores oil deteriorated or contaminated by water ingress or particulate accumulation.

Conclusion

Hydraulic systems cannot do without hydraulic oil filters. It is essential for preventive maintenance, cost reduction and reliability improvement of modern industrial equipment.