Hydraulic Oil ISO VG 220

Product Overview

SiNDA Hydraulic Oil 220 is an ISO VG 220 mineral-based hydraulic fluid developed for industrial hydraulic systems operating under sustained mechanical load and moderate-to-low operating speeds. In such conditions, maintaining a stable lubricating film is critical to prevent metal-to-metal contact, pressure loss, and accelerated component wear.

Viscosity selection is a decisive factor in hydraulic system reliability. ISO VG 220 is typically selected when lower-viscosity grades (e.g., ISO VG 100 or 150) may not maintain sufficient film thickness under load—often in systems with larger internal clearances, wear-related leakage, or continuous heavy-duty duty cycles.

Where ISO VG 220 Is the Right Choice

It is the appropriate selection when operating conditions demand increased film strength and load-carrying capability:

• Slow-speed, high-load hydraulic systems — higher viscosity supports film separation under pressure, helping reduce wear during heavy-duty cycles.
• Equipment with larger internal clearances — increased viscosity can help reduce internal leakage and support pressure stability.
• Continuous-operation environments — stable viscosity helps maintain predictable performance over longer service intervals.

Example: In a low-speed industrial hydraulic press with repeated high-pressure strokes, ISO VG 220 supports stronger film separation and can help reduce wear and surface fatigue.

Where ISO 220 Is NOT Recommended

Selecting an excessively high viscosity can introduce operational inefficiencies. ISO VG 220 is not recommended for:

• High-speed hydraulic systems: Excessive viscosity may cause sluggish response and energy losses.
• Cold-start environments: Thicker oil can restrict flow at low temperatures, delaying system response.
• Applications requiring rapid actuation: Faster response systems typically require lower viscosity grades.

Practical guideline: If startup response is consistently sluggish or actuation is delayed—especially in cooler conditions—viscosity may be too high (after ruling out filter restriction, pump condition, and control settings).

Operational Applications

SiNDA Hydraulic Oil 220 is suitable for a wide range of industrial applications where load stability and wear protection are priorities:

• Industrial hydraulic power units and centralized hydraulic systems
• Hydraulic presses, injection molding hydraulics, and heavy-duty material-handling hydraulics
• Industrial hydraulic circuits in manufacturing and processing equipment

Each application benefits from the oil’s ability to maintain film strength and reduce wear under demanding operating conditions.

Technical Specifications

SiNDA Hydraulic Oil 220 is formulated in the ISO VG 220 viscosity class. The following are typical values provided for reference:

• ISO Viscosity Grade: 220
• Density @15°C: 898 kg/m³
• Kinematic Viscosity @40°C: 222.3 mm²/s
• Kinematic Viscosity @100°C: 18.4 mm²/s
• Viscosity Index: 91
• Flash Point (COC): >215°C
• Pour Point: -12°C

In practical terms, these values indicate stable viscosity behavior under operating temperatures and sufficient thermal safety margins for industrial use.

Performance Characteristics

SiNDA Hydraulic Oil 220 is engineered to translate technical features into measurable operational outcomes:

• Load-carrying film strength — supports component protection under sustained pressure and helps reduce surface fatigue.
• Oxidation stability — helps extend oil service life and reduce deposit formation in long-running systems.
• Air release and foam control — supports stable pressure transmission and consistent hydraulic efficiency.
• Demulsibility (water separation) — promotes separation of incidental water, helping reduce corrosion risk in moisture-exposed environments.

These characteristics contribute to reduced downtime, longer component life, and more predictable maintenance intervals.

Compatibility & System Considerations

Hydraulic Oil 220 is intended for industrial hydraulic systems specified for mineral-based HM/HLP-type fluids, subject to OEM requirements and seal compatibility.

System considerations:

• Ensure operating temperatures align with viscosity requirements.
• Confirm pump design and speed are suitable for ISO VG 220.
• Avoid use in turbine systems or applications requiring low-temperature fluidity.

Selection Guidance

Choose this when:

• The system operates under continuous or heavy mechanical load
• Operating speeds are moderate to low
• Thicker oil films are required to maintain pressure stability

Consider a lower viscosity grade if:

• Rapid system response is critical
• Cold-start performance is a priority
• Energy efficiency losses become noticeable

When in doubt, a technical evaluation helps prevent costly misselection.

Compliance & Standards

SiNDA Hydraulic Oil 220 is manufactured with controlled quality parameters, and batch-level verification documentation can be provided upon request. Final application suitability of this hydraulic oil remains subject to the system OEM specifications and actual operating conditions.

Industrial FAQ

Is ISO 220 too thick for my system?
If your system operates at high speed or shows delayed response, a lower viscosity grade may be more appropriate.

What is the practical difference between ISO 220 and ISO 150?
ISO 220 provides a thicker lubricating film, offering better protection under load but slower response compared to ISO 150.

What are signs of incorrect viscosity selection?
Excessive heat generation, sluggish actuation, or pressure instability can indicate a mismatch.