V shaped seal is to prevent dust, water or other corrosive media from entering the bearing housing while retaining grease.

V shaped seal extends over the shaft and provides a tight interference fit. The V-shaped seal rotates with the shaft, causing the lip to rotate relative to the housing or bearing. As speed increases, friction decreases due to centripetal force.

V Style seals usually consist of the following main components:

  1. Sealing Ring: The sealing ring is the main sealing element of the seal and is usually made of elastic material (such as rubber or polyurethane). It is located between the shaft and housing and forms a seal by contacting the shaft surface.
  2. Spring: The spring is located inside the sealing ring and is used to provide preload force and maintain contact between the sealing ring and the shaft surface. The function of the spring is to ensure that the sealing ring has a certain contact pressure to maintain effective sealing performance.
  3. Static Ring: The static ring is located on the back of the sealing ring, in contact with the shell or sealing chamber wall, and plays a supporting and positioning role. Stationary rings are usually made of corrosion-resistant materials (such as ceramics or silicon carbide) to improve the seal’s wear and chemical resistance.

The working principle of the V Style seal is to achieve the sealing effect through the friction between the seal ring and the shaft surface and the force of the spring. When the shaft rotates, the sealing ring is acted upon by centrifugal force and liquid pressure, and the sealing ring tightly fits the shaft surface to prevent liquid leakage.

Type

Type VA – Due to its medium cross-section and wide diameter range, Type VA is the most popular V-seal design.

 

VC Style seals are a common seal type used for shaft seals on rotating equipment such as pumps and agitators.
VA Style seals are a common seal type that have the following characteristics:

  • Versatility: VA Style seals can be used in a variety of sealing applications, including static and dynamic sealing. They are widely used in automobiles, mechanical equipment, hydraulic systems, pneumatic systems and other fields to provide reliable sealing performance.
  • High sealing performance: VA Style seal adopts double-lip structure design and has excellent sealing performance. They can effectively prevent the leakage of liquid, gas or dust and other substances, ensuring the normal operation and efficiency of the system.
  • Wear resistance: VA Style seals are usually made of wear-resistant materials, such as rubber, polyurethane, etc. These materials have good wear resistance and can maintain the sealing effect over long periods of use, extending the service life of the seal.
  • High Temperature and Chemical Resistance: Certain VA Style seals have a special material formulation that makes them resistant to high temperatures and chemicals. This makes them suitable for sealing needs in high temperature and corrosive media environments, such as chemical equipment, petroleum industry, etc.
  • Easy Installation: The structural design of VA Style seals makes installation and replacement relatively simple. They usually have good elasticity and elastic recovery and can be easily installed in the sealing groove to achieve quick sealing.
    Size Diversity: VA Style seals are available in a variety of sizes and shapes to accommodate different sealing needs. Whether your seal is small or large, you can find the VA Style seal to fit.

VC Style seals have the following features:

vc style seals
vc style seals
  • Good sealing performance: VC Style seals can provide reliable sealing effects and effectively prevent liquid or gas leakage.
  • Adaptable: VC Style seals are suitable for a variety of industrial applications and media, including chemicals, oil, water, and more.
  • Wear Resistance: VC Style seals typically have a long service life due to their use of wear-resistant materials and their preloaded design
  • Easy installation and maintenance: VC Style seals are relatively simple to install and can generally be installed and maintained with simple tools.

It is important to note that specific VC Style seal designs and dimensions may vary depending on manufacturer and application requirements. When selecting and installing VC Style seals it is recommended to refer to the technical specifications and installation guide provided by Linde Polymer to ensure correct application and performance.

How to design and calculate the size and cross-sectional shape of rubber seals?

  1. First, clarify the required functions and application environment of the seal. Understanding the media (liquids, gases, etc.) the seal needs to protect against, the pressure requirements, temperature range, and other special requirements will help determine the appropriate sealing material and design parameters.
  2. Secondly, select the appropriate rubber material based on the application requirements. Common rubber materials include nitrile rubber (NBR), fluorine rubber (FKM), silicone rubber (VMQ), chloroprene rubber (CR), etc. Different materials have different chemical properties, wear resistance and temperature resistance, so it is important to choose the right material for a specific application.
  3. The best cross-sectional shape must also be determined based on the needs of the application and the characteristics of the rubber material. Common sealing shapes include O-rings, square rings, U-rings, V-rings, etc. The choice of shape should take into account sealing effectiveness, installation requirements and feasibility.
  4. Carry out size calculation: Carry out size calculation according to the application parameters and design requirements of the seal. Size calculation includes parameters such as inner diameter, outer diameter, thickness, etc. Typically, the appropriate size range is determined by considering factors such as compression, expansion, and deformation.
  5. Consider Tolerances: When designing a seal, take into account tolerances in materials and manufacturing processes. These tolerances may come from factors such as material shrinkage, mold manufacturing accuracy, and other factors. Proper consideration of tolerances ensures seal quality and performance.
  6. Conduct actual testing and verification: After the design is completed, conduct actual testing and verification. Verify the performance and suitability of seals through sample production and actual testing. If necessary, make adjustments and improvements until the desired sealing effect is achieved.