What Is a Metric Standard Hydraulic Adapters? - NJ

08 Sep.,2025

 

What Is a Metric Standard Hydraulic Adapters? - NJ

The metric standard hydraulic adapters use metric threads. Metric threads are represented by pitch, while American and British threads are represented by the number of threads per inch, which is their biggest difference. Metric threads have a 60 degree equilateral profile, British threads have an isosceles 55 degree profile, and American threads have a 60 degree profile. Metric threads are measured in metric units, while American and British threads are measured in imperial units. Pipe threads are mainly used for connecting pipes, and their internal and external threads fit tightly, with two types: straight pipes and tapered pipes. The nominal diameter refers to the diameter of the connected pipeline, and obviously the thread diameter is larger than the nominal diameter.

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The metric hydraulic adapter, also known as the metric threaded sleeve type adapter, tightens the hydraulic sleeve within the 24 ° cone surface of the adapter by tightening the nut, forming an effective hard contact seal while the threaded sleeve bites the steel pipe. The biggest characteristics of metric threaded sleeve adapters are reliable connection, high pressure resistance, temperature resistance, good sealing and repeatability, convenient installation and maintenance, and safe and reliable operation.

There are many types and sizes of metric hydraulic adapters, and the size and thread can vary between different systems and industries. When selecting the correct metric standard hydraulic adapter, its size, shape, and thread must be considered. Thread is an essential part of the metric hydraulic adapter in the connection system, and they can vary in size and type. Dimensions and threads are defined by many Chinese, European, and Japanese institutions.

1、Advantages of straight hydraulic connectors. This type of adapter is one of the simplest hydraulic adapters, and its connection method is very simple. Just place the two pipe end faces together and fix them with threads. This connection method is very tight, can effectively prevent liquid leakage, and is very easy to maintain and replace. In addition, the application range of through hydraulic adapters is very wide, and they can be used in various applications, including automotive, machinery, construction, and industrial fields.

2、90 degree hydraulic adapter is another very common connection method, which is very popular in different application scenarios. The main advantage of this type of adapter is its ability to achieve impact absorption function, which can effectively protect the hydraulic cylinder and valve from pressure impact and vibration. In addition, the 90 degree hydraulic adapter is also very flexible and can be used in small spaces, reducing obstacles to machine construction and improving machine performance and efficiency.

3、A three-way hydraulic adapter is a adapter used to connect three hydraulic pipelines. It is very suitable for complex hydraulic systems, ensuring the flow of liquids between different pipelines, while also allowing for flow and pressure regulation. In addition, three-way hydraulic adapters can also achieve distribution and assembly functions in hydraulic systems, allowing liquid to flow from one pipeline to multiple pipelines, thereby achieving higher efficiency and productivity.

In summary, straight, 90 degree, and three-way hydraulic adapters are all very important hydraulic components that enable the hydraulic system to achieve the function of liquid flowing from one place to another. The connection advantages of these hydraulic adapters include tight sealing, easy maintenance, flexible use, impact absorption, and pressure regulation. The use of these hydraulic adapters can improve the efficiency and performance of hydraulic systems, making machines and equipment more stable, reliable, and efficient.

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Choosing the appropriate metric hydraulic adapter material is another key factor in ensuring the normal operation of pipeline systems. Metric hydraulic adapters are usually made of materials such as brass, steel, and stainless steel.

1. Brass: The brass metric hydraulic connector is reasonably priced and widely used. This material has good corrosion resistance and oxidation resistance, so choosing brass is often a good choice, mainly used in low-pressure hydraulic pipelines.

2. Stainless steel: Stainless steel has good corrosion resistance, high temperature resistance, and stability, suitable for various pipeline systems. The advantages of stainless steel metric hydraulic adapters in pressure resistance, corrosion resistance, and long-term operation are recognized in the industry.

3. Carbon steel: In some application scenarios, metric hydraulic adapters made of carbon steel materials are also a good choice. Carbon steel hydraulic adapters have advantages such as strong sealing, good durability, and low operating costs, making them a highly cost-effective hydraulic accessory. With the continuous progress of industrial technology, the excellent quality of carbon steel hydraulic adapters will be discovered in a wider range of application scenarios and become an important component of hydraulic systems.

The correct positioning and characteristics of metric hydraulic adapters can only be effectively utilized under correct installation and maintenance conditions. The following are tips for installing and maintaining metric hydraulic adapters:

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1.Before selecting a metric hydraulic adapter, make sure to understand the pipe specifications and dimensions, and ensure that the threads match the pipe.

2.When manually installing metric hydraulic adapters, it is important to avoid excessive tightening and ensure that they can be fully and tightly connected to the pipeline.

3.During the installation process, it is essential to use reliable tools to avoid damaging the adapters or application materials.

4. Ensure the use of high-quality sealing materials during installation to prevent leakage.

5. After the pipeline system is running, it is necessary to regularly check the sealing performance of the metric hydraulic adapters to ensure no leakage connections.

If the pipeline system requires replacement or maintenance of certain components, be sure to inspect all metric hydraulic adapters and seals. If any leakage is found, it must be replaced in a timely manner.

As a crucial component of pipeline systems, metric hydraulic adapters play an irreplaceable role in the operation and safety of the system. When choosing metric hydraulic adapters, many factors need to be considered, such as size, thread, and material manufacturing. As a crucial component of pipeline systems, metric hydraulic adapters have a significant impact on the operation and safety of the system. The correct selection, installation, and maintenance of metric hydraulic adapters can ensure the smooth operation of the entire pipeline system, improve work efficiency, and better serve people's production and life.

Understanding of Hydraulic Metric Fittings - topolpower

Metric hydraulic fittings are essential components in hydraulic systems that adhere to the metric measurement system. These fittings serve to connect hydraulic hoses, tubes, and pipes to pumps, valves, and various hydraulic components. Typically, they feature a threaded connection for easy attachment to bungs, ports, or adapters and come in various shapes and sizes to suit different hydraulic system components.

The threads on these fittings are generally straight, characterized by the major diameter and pitch. For example, an M12x1.5 fitting indicates an outer thread diameter of 12 mm and a thread spacing of 1.5 mm. Most metric fittings are produced with a 1.5 mm pitch.

Advantages of Metric Fittings for Hydraulic Systems

Using metric fittings in hydraulic systems offers several benefits:

1. Global Compatibility: Metric fittings align with the metric system, widely utilized in Europe, Asia, and many other regions. This compatibility simplifies sourcing components on the international market and facilitates collaboration with suppliers worldwide. For North American manufacturers shipping overseas, adopting metric fittings meets customer specifications for local sourcing.

2. Space Efficiency: Metric hydraulic fittings are often more compact than imperial fittings (especially NPT), allowing for space savings in hydraulic systems. They also generally possess higher working pressure and temperature ratings, making them suitable for demanding applications. The O-ring on straight-thread metric fittings is bonded to the washer, reducing the risk of improper sealing by maintenance personnel.

3. Cost-Effectiveness: Typically, metric hydraulic fittings are less expensive than their imperial counterparts due to mass production globally, making them a cost-effective choice for various applications.

Types of Metric Hydraulic Fittings

Numerous metric hydraulic fittings are designed for specific uses. Some of the most common types include:

  • Metric Port Fittings: These usually feature a male end opposed by either a male or female end with a bonded O-ring for sealing, commonly used in high-pressure hydraulic systems. Be aware that different manufacturers may assign separate part numbers for fittings and seals, necessitating separate orders.
  • Metric Flare Fittings: With a 60° flared end, these fittings create a tight seal with the mating tube when compressed by a nut, ensuring a leak-free connection.
  • Metric DIN Fittings: Similar to flare fittings but utilizing a sleeve and nut for attachment, these are prevalent in hydraulic systems in Europe and other regions.
  • Metric Adapters: These fittings provide interfaces for connecting metric plumbing to imperial ports or vice versa, accommodating various standards.

Materials Used for Metric Hydraulic Fittings

Like imperial fittings, metric hydraulic fittings are made from various materials suited to specific applications. Common materials include:

  • Stainless Steel: Known for excellent corrosion resistance and strength, 304SS is ideal for general protection, while 316SS is preferable for corrosive environments.
  • Brass: A softer and less expensive option, brass is primarily used in low-pressure hydraulic systems.
  • Carbon Steel: Durable and strong, carbon steel is common in high-pressure applications and is often plated with zinc or nickel for corrosion resistance.
  • Aluminum: This lightweight material is frequently used in mobile hydraulic systems or specialty applications like fuel lines.

Selecting the Right Metric Hydraulic Fitting

Choosing the appropriate metric hydraulic fitting involves considering several factors:

  • Pressure and Flow Requirements: Determine the size and type of hydraulic hose, tube, or pipe needed based on these requirements. Larger plumbing accommodates increased flow rates, while return lines are typically larger to reduce fluid velocity and backpressure.
  • Size Compatibility: Be mindful that larger fittings may not be available in all materials. For instance, an M52x1.5 fitting may not come in 316SS, necessitating compromises.
  • Material Strength: Higher pressure applications usually require fittings made from carbon or stainless steel, while some smaller aluminum and brass fittings can handle moderate pressures.
  • Adapter Selection: Ensure that the chosen adapter aligns with the system layout to facilitate efficient installation. Consulting with a hydraulic expert can aid in selecting the appropriate fitting.

Using Metric and Imperial Hydraulic Fittings Together

While metric and imperial hydraulic fittings are not inherently compatible, adapters are available to connect them. Caution is necessary when using adapters, as mismatched threads and dimensions can lead to leaks and operational issues. It’s advisable to utilize fittings of the same type and size for optimal performance and reliability.

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