Metric hydraulic fittings are used in hydraulic systems to connect hoses, pipes, and tubes to various components such as pumps, valves, and cylinders. These fittings are designed according to metric dimensions and standards, which are widely used in Europe and other parts of the world.
Metric hydraulic fitting types:
- Metric O-Ring Face Seal (ORFS) Fittings
Description: These fittings have a flat sealing surface with an O-ring that ensures a leak-proof seal when connected.
Application: Used in high-pressure hydraulic systems to prevent leaks and maintain integrity under vibration and thermal cycling.
Description: These fittings have a 24-degree conical seat and are commonly used in conjunction with metric threads.
Subtypes: Light Series (L Series): Used for lower pressure applications.
Heavy Series (S Series): Used for higher pressure applications.
Application: Widely used in hydraulic and pneumatic systems in Europe.
- Metric 60° Cone Fittings
Description: These fittings feature a 60-degree conical seat that provides a robust seal.
Application: Commonly used in hydraulic applications that require a secure and reliable connection.
Description: These fittings use parallel threads and typically require a sealing washer or O-ring to achieve a leak-proof seal.
Application: Commonly used in hydraulic systems in Europe and other regions where BSPP standards are prevalent.
- Metric Banjo Fittings
Description: These fittings consist of a hollow bolt and spherical union that can rotate.
Application: Used in confined spaces where a flexible connection is required, such as in automotive and machinery hydraulic systems.
- JIS metric fittings
JIC metric fittings are most frequently used as hose adapters on equipment manufactured in Japan and Korea. They incorporate a 30° flare and 60° cone connection and typically include BSP threads. Kobelco, a major Japanese OEM construction machinery manufacturer, uses Japanese hydraulic hose and JIS hydraulic fittings.
- Komatsu Metric fittings:
Komatsu metric 30° flare is one of the most common specialized fittings for a specific OEM mobile equipment manufacturer. While most other OEMs rely on common industry standards, Komatsu has developed this proprietary fitting that is superior in applications on their own equipment.
International standards:
Metric hydraulic fittings are designed and manufactured according to various standards to ensure compatibility and performance. Some of the common standards include:
DIN (Deutsches Institut für Normung): A German standard that specifies dimensions, tolerances, and testing requirements for hydraulic fittings. For example, the DIN 2353 standard focuses on flareless bite fittings, which are critical for high-pressure systems. In short, if a product is DIN certified, it is a sign of quality and international recognition.
ISO (International Organization for Standardization): Provides international standards for hydraulic fittings to ensure global compatibility. For example, ISO 8434: This is another standard for metric fittings related to 24-degree taper fittings; ISO 6149: This standard specializes in metric O-ring face seals; ISO 9974: This standard covers metric ports and stud ends.
What materials are metric hydraulic fittings made from?
Metric hydraulic fittings are manufactured from various materials, each chosen based on the specific requirements of the hydraulic system, including pressure, temperature, fluid compatibility, and environmental conditions. Here are some common materials used in the production of metric hydraulic fittings:
- Carbon Steel
Characteristics: Strong, durable, and cost-effective.
Applications: Widely used in general hydraulic applications, especially where high pressure and high mechanical strength are required.
Surface Treatments: Often coated with zinc, nickel, or chrome to enhance corrosion resistance.
- Stainless Steel
Characteristics: Excellent corrosion resistance, high strength, and durability.
Applications: Ideal for use in harsh environments, including marine, chemical processing, and food industries where corrosion resistance is critical.
Grades: Commonly used grades include 304 and 316 stainless steel, with 316 offering superior corrosion resistance.
- Brass
Characteristics: Good corrosion resistance, easy to machine, and good thermal conductivity.
Applications: Commonly used in low to medium pressure applications, especially in plumbing, automotive, and refrigeration systems.
Advantages: Resistant to dezincification and suitable for potable water systems.
The advantages of using Metric fittings:
- Ease of Use
Simplicity: The metric system is based on the decimal system, which simplifies calculations, measurements, and conversions.
Fewer Sizes: Standardized sizing in metric fittings often means fewer variations and sizes to manage, streamlining inventory and reducing complexity.
- Versatility
Wide Range of Applications: Suitable for various industries, including automotive, aerospace, manufacturing, and agriculture.
Material Options: Available in a variety of materials (steel, stainless steel, brass, aluminum), making them adaptable to different environments and applications.
- High Pressure and Temperature Ratings
Performance: Metric fittings are designed to handle high pressure and temperature ranges, making them suitable for demanding hydraulic applications.
Durability: High-quality materials and precise manufacturing processes ensure long-lasting performance even in harsh conditions.
- Improved Sealing Mechanisms
Advanced Designs: Metric fittings often incorporate advanced sealing mechanisms such as O-ring face seals (ORFS) and 24° cone fittings, providing superior leak prevention and reliability.
Reduced Maintenance: Better sealing reduces the need for frequent maintenance and downtime, improving overall system efficiency.
- Environmental Compatibility
Corrosion Resistance: Available in materials and coatings that provide excellent corrosion resistance, suitable for harsh and corrosive environments.
Chemical Compatibility: Metric fittings are often compatible with a wide range of hydraulic fluids and chemicals, enhancing their versatility.
- Cost-Effectiveness
Standardization: Standardized sizes and global availability can lead to lower costs in production and procurement.
Long-Term Savings: Reduced leakage, lower maintenance needs, and improved reliability contribute to long-term cost savings.
Conclusion
Understanding the different types of metric hydraulic fittings is crucial for selecting the right components for a hydraulic system. Each type has its unique characteristics and applications, ensuring that the system operates efficiently and reliably. When choosing metric hydraulic fittings, it is essential to consider factors such as pressure rating, sealing method, and compatibility with other system components to ensure optimal performance.
The benefits of buying Metric fittings from QC Hydraulics?
- One-stop shopping: QC Hydraulics provide a wide range of hydraulic fittings. No need to jump around from supplier to supplier or worry about compatibility issues. Our Metric fittings are compatible with Parker, Eaton products.
- Quality assurance: At QC Hydraulics, all fittings meet strict manufacturing standards and meet all international standards, ensuing that your investment is built to last.
- Competitive pricing: QC Hydraulics offer highest grade products at an affordable price. We aim to help customers saving worries, saving money.
- Technical support: At QC Hydraulics, we have a very professional team to help you choose correct products, saving your time of communications.