Foot-shape slip ring combined seal – Slip ring combined seal

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A slip ring seal, also known as a rotary seal or rotating seal, is a specialized sealing component used in rotating applications to prevent fluid or gas leakage between a rotating shaft and its stationary housing. Slip ring seals are designed to maintain a reliable and secure seal while allowing the rotational movement of the shaft.

The primary function of a slip ring seal is to create a barrier between the rotating shaft and the housing, preventing the escape of fluids or gases and blocking the entry of contaminants into the system. These seals are commonly used in various rotating equipment and machinery, including pumps, compressors, turbines, mixers, and rotary joints.


Slip Ring Seal

A slip ring seal is a type of mechanical sealing device used to prevent fluid or gas leakage in rotating machinery. It is typically used in equipment with rotating shafts, such as electric motors or generators, to provide a seal around the rotating shaft and prevent the leakage of fluids or gases from one side of the seal to the other. A slip ring seal is typically made up of a stationary component and a rotating component, and is designed to maintain a sealing interface as the shaft rotates.

Performance and Purpose

Slip ring combined seal is made up of low-friction PTFE composite slip ring and O-ring. It has the advantages of friction resistance, temperature resistance, high pressure bearing ability, high linear velocity, small friction force and long use-life. And which is applicable to dynamic and static seal of hydraulic and pneumatic system in aircraft, metallurgy, petroleum, chemical, textile, food industry and so on.


  1. The structure is simple, easy to install and can be used repeatedly
  2. The sealing performance is reliable and adjustable
  3. Different types of PTFE materials(Self pressed PTFE barrel material)can be selected according to the working conditions of sealing environment
  4. The working life of dynamic pressure seal is 5 ~ 10 times higher than that of conventional rubber sealing products, and the highest working life can reach dozens of times
  5. It can be used as oil-free lubrication seal
  6. The friction force is small, and the dynamic and static friction force are equal. The friction force is 1 / 2 ~ 1 / 4 of the O-type rubber ring, which can eliminate the “crawling” phenomenon of motion at low speed and low pressure.

    Key features and characteristics 

Design: Slip ring seals are typically composed of a stationary housing or gland, a sealing element, and a spring or other means to maintain sealing force. The sealing element is in direct contact with the rotating shaft, forming a dynamic interface that accommodates the rotational movement while maintaining an effective seal.

Materials: Slip ring seals are available in a variety of materials to suit different operating conditions and fluids.The choice of material depends on factors such as temperature, fluid compatibility, and wear resistance.

Lubrication: Slip ring seals often require lubrication to minimize friction and heat generation during rotation. Lubricants or barrier fluids may be used to ensure smooth operation and extend the life of the seal. Some slip ring seals incorporate internal lubrication systems or utilize the fluid being sealed as a lubricant.

Pressure and temperature range: Slip ring seals are designed to withstand a wide range of pressures and temperatures. They can accommodate both low-pressure and high-pressure applications, depending on the specific design and material selection. It is essential to consider the operating conditions and select a slip ring seal that can handle the expected pressure and temperature range.

Maintenance: Proper installation and regular maintenance are crucial for the optimal performance of slip ring seals. Inspections, cleaning, and lubrication, if required, should be performed according to the manufacturer’s guidelines. Regular monitoring of seal performance helps identify any signs of wear or damage, allowing for timely replacement or repair.

Slip ring seals play a critical role in maintaining the integrity of rotating systems by preventing leakage and protecting sensitive components from contamination. Their reliable sealing performance under rotational motion makes them essential in a wide range of industries, including power generation, oil and gas, chemical processing, and many others.


Slip ring seals are commonly used in a variety of applications, including:

  1. Electric motors: They are used to seal the rotating shafts in electric motors to prevent fluid or gas leakage.
  2. Generators: They are used in generator systems to prevent fluid or gas leakage from the rotating components.
  3. Rotary unions: They are used in rotary unions to prevent fluid or gas leakage from the rotating component to the stationary component.
  4. Wind turbines: They are used in wind turbines to prevent fluid or gas leakage from the rotating component to the stationary component.
  5. Industrial machinery: They are used in a variety of industrial machinery, such as printing presses, cranes, and hoists, to prevent fluid or gas leakage from the rotating component to the stationary component.
  6. Aerospace and defense equipment: They are used in aerospace and defense equipment, such as helicopters and aircraft, to prevent fluid or gas leakage from the rotating component to the stationary component.

Overall, slip ring seals are designed to prevent fluid or gas leakage in rotating machinery and to ensure that the equipment operates efficiently and reliably.

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