metric hydraulic fitting types

When selecting the appropriate connections for hydraulic systems, understanding the various metric hydraulic fitting types is crucial. These fittings play a vital role in ensuring leak-free connections and optimal performance in hydraulic applications. Below, we explore the most common metric hydraulic fitting types, along with their characteristics and applications.

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Common Metric Hydraulic Fitting Types

Metric hydraulic fittings come in various configurations, each designed to work with specific hose types and pressure ratings. Here are some of the most prevalent metric hydraulic fitting types:

1. Metric Threaded Fittings

Metric threaded fittings are among the most widely used types in hydraulic systems. They are characterized by their distinct threading, which ensures a secure connection. The most common variations include:

• Metric O-ring Boss (ORB): These fittings feature a flat sealing surface and an O-ring groove that offers an exceptional seal under pressure. They are ideal for dynamic applications.
• Metric Parallel Threads: Parallel thread fittings have a cylindrical design, providing a tight fit when paired with compatible threaded counterparts. An additional sealing element might be required.
• Metric tapered threads: Tapered threads are designed to create a wedging effect when tightened, ensuring a leak-free connection. They are often used for high-pressure applications.

2. Metric Flare Fittings

Flare fittings are another popular choice among metric hydraulic fitting types. They feature a conical sealing surface that creates a reliable leak-proof connection when torqued properly. These fittings allow flexibility and are commonly used with copper tubing and rubber hoses.

• 45-degree Flare: This type of flare fitting is designed for use with soft and hard tubing, providing an effective seal without the risk of damage to the tubing.
• 30-degree Flare: Used predominantly in industrial hydraulic applications, these fittings create a robust connection and are less common than 45-degree flares.

3. Metric Quick Connect Couplings

Quick connect couplings are designed for ease of use and convenience, allowing for rapid connection and disconnection without tools. They are especially useful in applications where frequent changes of hydraulic lines are necessary. Among metric hydraulic fitting types, these couplings come in:

• Male and Female Couplings: Designed to mate with a simple push, these fittings can be easily connected and disconnected using one hand.
• Push-to-Connect: This type allows for quick operational adjustments with minimal effort, making them ideal for mobile and in-field applications.

4. Metric Banjo Fittings

Banjo fittings are unique metric hydraulic fitting types that incorporate a flat sealing surface and a circular flange, allowing for a compact and lightweight connection. They are often utilized in situations where space is a concern. These fittings are commonly found in:

• Fuel Systems: They facilitate a connection in tight spaces, particularly where smooth flow and minimal restriction are necessary.
• Hydraulic Lines: Banjo fittings can be used effectively to connect hoses to hydraulic components, ensuring fluid movement with low turbulence.

Choosing the Right Metric Hydraulic Fitting Type

When deciding on the correct metric hydraulic fitting type for your application, consider the following factors:

• Fluid Compatibility: Ensure the fitting material is compatible with the hydraulic fluid used in your system.
• Pressure Ratings: Select fittings that can handle the maximum pressure requirements of your application to prevent failures.
• Space Constraints: Assess the layout of your system to choose fittings that will fit adequately without compromising performance.

Understanding the various metric hydraulic fitting types and their specific applications will enable you to design a hydraulic system that is efficient, safe, and reliable. Make informed choices based on the unique needs of your operations to optimize performance and durability.

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