Optimizing your hydraulic system: How to choose the best hydraulic hose size and connections to improve the efficiency and performance of your system?

hydraulic solutions for oil and gas

Hydraulic transmission is a kind of transmission method widely used in machinery, engineering, aviation, military and other fields. Its importance lies in its ability to achieve efficient, accurate and fine force control and energy conversion through the transmission of liquid medium. Hydraulic transmission has the advantages of high transmission efficiency, high power density, adjustable transmission speed, sensitive response, good load adaptability, etc. Therefore, it is widely used in various engineering machinery, industrial automation equipment, etc.

The hydraulic hose is an important part of the hydraulic transmission to carry, transfer and protect the role. Hydraulic hose can withstand high pressure, wear-resistant, corrosion-resistant, with a certain degree of flexibility and bendability, to protect the safety of the transmission medium in the hydraulic system, but also to connect the hydraulic components to form a complete hydraulic system. Therefore, the role of hydraulic hoses in the hydraulic transmission is crucial.

Choosing the right hydraulic hose size and connection has a great impact on the performance and safety of the hydraulic transmission system. First, the right size can ensure that the hydraulic hose will not burst or leak under high pressure, but also to ensure the flow of liquid media and transfer efficiency. Secondly, the correct connection can ensure a solid and reliable connection between hydraulic hoses and hydraulic components to prevent hydraulic system failure and safety accidents caused by loose or failed connections.

Determine the operating conditions

  • Flow and Pressure Requirements:The operating flow and pressure requirements of a hydraulic system are the basis of hydraulic system design. Flow requirements are usually determined by the required power, speed, force or torque, etc., while pressure requirements are determined by the required work load, fluid resistance, etc. In determining flow and pressure requirements, factors such as the type of fluid used, line size, system configuration and operating cycle need to be considered.
  • Operating temperature and environmental conditions:The performance and life of a hydraulic system may change under different temperatures and environmental conditions. For example, high temperatures can reduce hydraulic fluid viscosity, which can affect system performance, while humidity and contaminants can lead to component corrosion and system leakage. Therefore, when designing hydraulic systems, factors such as temperature and humidity of the operating environment need to be considered to ensure system reliability and performance. Additional considerations are required for special applications such as high altitude, low temperature, high humidity, desert or marine environments.
  • Equipment and system size constraints: The design of hydraulic systems must also consider the size constraints of the equipment and system. These limitations may include space limitations of the equipment, weight limitations, and the cost of materials required. When designing a hydraulic system, these factors need to be balanced and the best solution selected to meet the operating conditions and system limitations. For example, the physical size and shape of the machine may affect the layout and connections of the piping, and limit the design options for the system. In addition, the weight limitations of the system may also affect the selection of the required hydraulic pump and component sizes.

Understand the advantages and disadvantages of different hydraulic hose sizes and connection methods

The influence of diameter, wall thickness and material


  • Diameter: The diameter of hydraulic hoses is usually related to flow requirements, with larger diameters providing greater flow rates. However, larger diameters can result in bulkier and more expensive lines.
  • Wall thickness: Wall thickness affects the strength and durability of the hose. A thicker wall thickness can improve the durability and corrosion resistance of the line, but it can also increase the weight and cost of the line.
  • Material: Hydraulic hoses are usually made of polyester, polyurethane or polyamide. Different materials have different characteristics, such as strength, abrasion resistance, corrosion resistance, etc. When choosing hydraulic hoses, you need to choose the right material according to the actual demand.

Advantages and disadvantages of various connection methods

  • Welding: Hydraulic hoses can be connected by welding. This type of connection is usually suitable for high pressure and high temperature applications and can provide high strength and sealing, but requires specialized skills and equipment and is not easily disassembled and replaced.
  • Clamps: Hydraulic hoses can be connected by means of clamps. This type of connection is suitable for low to medium pressure applications and can provide a better seal and easy installation and removal. However, the diameter and wall thickness of the hose need to be taken into account when using clamps to ensure the stability and reliability of the connection.
  • Flanges: Hydraulic hoses can be connected by flanges. This type of connection is suitable for high pressure and large diameter applications and provides high strength and tightness, easy disassembly and replacement. However, care needs to be taken when using flange connections to select the proper material and gasket to ensure the stability and reliability of the connection.

Select the optimum hydraulic hose size and connection method

  • Determine the working conditions:including factors such as working temperature, pressure and flow rate. These factors will affect the choice of hydraulic hoses, such as the need to choose high temperature resistant materials when the working temperature is high.
  • Determine the performance needs:including the strength, durability, corrosion resistance of the hose. These factors will affect the choice of hydraulic hoses, such as the need for high strength and durability need to choose a larger wall thickness of the hose.
  • Determine flow and pressure requirements:The diameter and wall thickness of hydraulic hoses are usually related to the flow and pressure requirements. It is necessary to choose the right diameter and wall thickness according to the actual demand.
  • Select the right material:Hydraulic hoses are usually made of polyester, polyurethane or polyamide. It is necessary to choose the right material according to the working conditions and performance requirements.
  • Selecting the right connection method:The connection methods of hydraulic hoses are usually welding, clamping and flange. It is necessary to choose the appropriate connection method according to the working conditions, performance requirements and materials.

Consider cost and reliability: The cost and reliability of hydraulic hoses also need to be considered. Sometimes there is a trade-off between cost and reliability to choose the most suitable hydraulic hose size and connection method.

Optimize the performance and efficiency of the hydraulic system

  • Reasonable selection of hydraulic components:The selection of hydraulic components directly affects the system performance and efficiency. It is necessary to select suitable hydraulic components, including hydraulic pumps, valves, cylinders, etc., according to the working conditions and performance requirements of the system.
  • Optimization of hydraulic oil:hydraulic oil is an important part of the hydraulic system, you need to choose the right hydraulic oil, and regular replacement, filtration and maintenance to ensure the performance and cleanliness of the hydraulic oil, to improve the efficiency of the system.
  • Reasonable design of hydraulic pipeline: The design and layout of hydraulic pipeline directly affects the system efficiency, and it is necessary to choose suitable pipeline size and layout to reduce pipeline resistance and leakage loss and improve the system efficiency.
  • Optimization of hydraulic system control:the control mode and control strategy of hydraulic system also affect the system efficiency, need to choose the appropriate control mode and controller, optimize the control strategy, reduce energy loss and waste.
  • Strengthen hydraulic system maintenance:hydraulic system needs regular inspection, maintenance and repair, timely detection and troubleshooting to maintain the normal operation and efficiency of the system.
  • Apply energy-saving technology: The application of energy-saving technology, such as frequency conversion technology, throttling technology, pneumatic-hydraulic hybrid technology, etc., can effectively improve the efficiency and energy utilization of the hydraulic system.


Therefore, the importance of choosing the right hydraulic hose size and connection method cannot be ignored. When choosing the hydraulic hose size, it is necessary to consider the maximum working pressure, flow rate and working temperature of the hydraulic system, and choose the appropriate inner diameter and wall thickness according to these factors. When choosing the connection method, you need to choose the suitable connection method according to the type of hydraulic components and installation method, such as threaded connection, flange connection, etc., and you need to ensure the sealing and reliability of the connection method.

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