The Industry Standard in Hydraulic Cylinders: Introducing ISO 6022 Series Hydraulic Cylinders
The Industry Standard in Hydraulic Cylinders: Introducing ISO 6022 Series Hydraulic Cylinders
The Industry Standard in Hydraulic Cylinders: Introducing ISO 6022 Series Hydraulic Cylinders
Why is it important to choose a cylinder that meets standards?
The choice of cylinders in hydraulic systems plays a critical role in the performance, reliability and maintenance costs of the machine. Cylinders designed to meet standards provide advantages in terms of ease of installation, spare parts compatibility and global acceptance. Liebherr's ISO 6022 series combines flexibility and technical quality with a "mass production" approach that meets these expectations.
In this article, we will discuss the technical specifications, application areas, advantages and considerations of this series.
ISO 6022 Series: Specifications and Structure
Variety and Configuration Flexibility
A total of 24 basic cylinder variants are offered in Liebherr's ISO 6022 series.
These variants are shaped by combinations of piston diameter and piston shaft diameter.
|
Characteristic |
Range / Value |
|
Piston diameter (mm) |
63 – 320 |
|
Piston rod diameter (mm) |
40 – 220 |
|
Maximum stroke |
2,700 mm (higher than application, special if requested) |
|
Maximum operating pressure |
250 bar (standard) |
These technical values make the ISO 6022 series suitable for many industrial applications.
Mounting Types and Connection Options
The ISO 6022 series is available with 6 types of mounting types that can cater to different mounting needs. These mounting types are:
MP3: Bushing eye
MP5: Spherical bearing eye
MF3: Round flange at head
MF4: Round flange at base
MT4: Mounting with oscillating connection (trunnion / swivel bearing)
MS2: Foot mounting
There is also flexibility on the connection side: on the body and piston side, threaded connections of inch, metric, UNF or SAE type can be selected. In addition, screw connection at the piston shaft ends or pre-mounted pendulum arms can be offered as an option.
Coating, Sealing and Additional Equipment
Coating (Piston Shaft Coating)
As standard, the piston rod is single-chrome plated (≈ 25 μm). For situations where more aggressive corrosion or impact resistance is required, a double chrome plating option is available, which is rated according to 96-hour AASS test criteria (Rating 10).
Sealing System
A tandem sealing system (primary + secondary seal) is used for rod-side (piston shaft side) surface sealing. This construction ensures high reliability. In addition, low-friction seals are preferred as standard.
Other Equipment Options
Cushioning system: Reduces vibration by smoothing the stroke on the piston and/or shaft side.
Sensor technology: Position transducers, proximity sensors, and measuring connections can be integrated. This feature allows the roller movements to accompany automation.
Control block assembly: Control blocks can be integrated on both the piston and body sides.
Vent/metering connections: Air venting or metering connections can be added on both the piston and body sides.
Performance Limits and Tolerances
The maximum operating pressure is usually set at 250 bar.
Cylinder stroke tolerances vary according to the type of mounting and the total stroke length (e.g. tolerances such as 1.5 mm ± for 1,250 mm ≤).
The recommended upper limit for piston speed is about 1 m/s.
Operating temperatures are typically specified between –20 °C and +80 °C.
Application Areas and Advantages of ISO 6022 Series
Uses
The ISO 6022 series is mainly used in stationary applications; It is especially preferred in areas such as steel rolling, paper industry, automation systems, machine tools and production lines. The rollers in this series are designed to be able to withstand both static and dynamic loads.
For example, it can be used as a thickness adjustment roller in steel rolling mills or as a tool change roller in tool changers.
Advantages
Standard compatibility + customizability
System integration is easy thanks to dimensions compliant with the ISO 6022 standard. It also offers customization with options such as sensor, coating, and mounting types.
Short lead time and cost advantageThe mass production approach reduces cost and shortens lead times while maintaining as much flexibility as custom production.
Durability and performanceIt works for a long time thanks to its high-quality sealing, coating systems and tolerance control.
Intelligent monitoring and controlWith the integration of sensors and measuring systems, cylinder movement can be monitored and controlled. This provides an advantage in maintenance processes.
Variety of versionsThanks to 24 basic variant + option combinations, it adapts to a wide range of applications.
Points to Consider
Pressure, wave and peak loads: Sudden pressure peaks can occur within the system. In this case, the nominal pressure values of the cylinder should be checked and the safety margin should be left.
Proper oil and filtration: Seals only work with suitable hydraulic oils. The cleanliness of the oil (e.g. compliance with the ISO 4406 standard) is critical.
Mounting Accuracy: Geometric accuracies such as mounting tolerances, axis deviation, and horizontal-vertical alignment severely impact roller performance.
Maintenance and spare parts supply: Sensors, seals and coating wear require periodic inspection. The use of standard products provides an advantage in the supply of spare parts.
Environmental Conditions: Environmental factors such as temperature, corrosion, and vibration can affect coating, material selection, and external protective measures.
Conclusion and Evaluation
Conclusion: Reliable Reflection of Standard Power
The ISO 6022 series is an industry-recognized reference standard for years.Liebherr's cylinders complying with this standard; It stands out with advantages such as high strength, dimensional precision, short delivery time and optional sensor integration.
Hidroman evaluates such standard solutions in system design and revision projects and offers its customers the most suitable hydraulic solutions both in terms of engineering and economy.
For detailed information about this article, you can visit Liebherr's official website.
Hidroman Informs
Hydraulic cylinders compliant with the ISO 6022 standard ensure safe performance in stationary systems operating under high pressure. You can contact our Hidroman technical team to choose the right cylinder for your system or to evaluate alternative standard products.