HL Hydraulic Oil is a premium mineral-based hydraulic fluid formulated according to DIN 51524 Part 1 (HL category) for use in hydraulic systems operating under light to medium load conditions. Specifically engineered for applications that do not require anti-wear (AW) additives, HL Hydraulic Oil provides reliable lubrication, oxidation stability, corrosion protection, and smooth operation in a wide range of industrial and mechanical hydraulic systems.

Its high level of purity and controlled viscosity characteristics make it suitable for equipment operating at moderate pressures, including circulating systems, lightly loaded hydraulic pumps, and machinery where thermal stability and resistance to aging are essential performance factors. With excellent filterability and air-release properties, HL Hydraulic Oil helps maintain efficient hydraulic response and reduces the risk of cavitation.

Key Performance Features

1. Excellent Oxidation Stability

Formulated to resist oil degradation and sludge formation, ensuring longer service life and cleaner system operation.

2. Reliable Corrosion and Rust Protection

Protects internal metal surfaces from rust, corrosion, and moisture-related damage, especially in environments with varying humidity.

3. Smooth and Consistent Hydraulic Response

Maintains stable viscosity over the operating temperature range, supporting predictable pump and valve operation.

4. Superior Air Release and Low Foaming

Prevents foam formation and allows entrained air to escape quickly, reducing the risk of cavitation and ensuring uninterrupted hydraulic pressure.

5. Good Filterability and Clean System Performance

Designed to remain compatible with fine filtration systems to prevent clogging and maintain optimum oil purity.

Recommended Applications

HL Hydraulic Oil is designed for hydraulic systems that require basic lubrication without anti-wear enhancers.

1. Industrial Hydraulic Systems

• Light-duty hydraulic pumps
• Control valves
• Hydraulic actuators
• Low-to-medium pressure circuits

2. Circulating and Lubrication Systems

Suitable for general lubrication in:

• Bearings
• Compressors (non-load intensive)
• Light mechanical equipment

3. General Industrial Machinery

Ideal for:

• Machine tools
• Textile machines
• Packaging equipment
• Workshop machinery

4. Equipment Operating in Stable, Moderate Conditions

Where system design does not demand anti-wear or extreme-pressure additives.

Advantages of HL Hydraulic Oil

• Provides clean, stable hydraulic operation
• Prolongs equipment life in non-severe conditions
• Economical solution for older or simpler hydraulic systems
• Prevents sludge, varnish, and deposit buildup
• Enhances reliability of pumps and valves under moderate loads
• Maintains good lubrication even during continuous operation

Typical Technical Specifications (Example Values for ISO VG 32 / 46 / 68)

Exact values depend on ISO grade and supplier formulation.

Performance Considerations

• Not recommended for systems requiring anti-wear (AW) or high-pressure protection (use HLP instead).
• Best suited for stable, clean hydraulic environments.
• Compatible with seals commonly used in hydraulic systems (NBR, VMQ, ACM).
• Offers reliable performance in industries where cost-effective lubrication is desired.

Storage & Handling Guidelines

• Store in dry, cool areas away from direct sunlight
• Avoid moisture contamination
• Keep containers sealed when not in use
• Use separate hoses and equipment to prevent cross-contamination with AW oils
• Follow standard environmental disposal procedures for used oil

Conclusion

HL Hydraulic Oil is a dependable mineral hydraulic fluid ideal for systems that require standard lubrication, oxidation stability, and corrosion protection without the need for anti-wear additives. Designed for light and medium-duty applications, it delivers smooth hydraulic performance, reduces operational issues such as foaming and sludge formation, and provides a cost-efficient solution for a wide range of industrial equipment.