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Spring Energized Seal With Back-up Ring
2.During normal operation, the spring-energized seal plays the main sealing role. When the pressure increases, the backup ring prevents it from being squeezed, damaged or extruded out of the seal gap, thus enhancing the sealing reliability.
Product Details
The spring-energized seal is the core sealing component, and the backup ring cooperates with it as an auxiliary part. Usually, the backup ring is located on one or both sides of the spring-energized seal, and they are installed into the seal groove as a whole during the installation process.
Under normal working conditions, the spring-energized seal relies on the elastic force of the internal spring to make the sealing lip closely adhere to the sealing surface, thus fulfilling the main sealing function and preventing fluid leakage. While in this process, the backup ring mainly plays its role when there is a change in pressure. When the internal pressure of the sealing system increases and the fluid exerts a relatively large extrusion force on the seal, the backup ring can prevent the spring-energized seal from being overly squeezed and damaged or being extruded out of the sealing gap. For example, in a hydraulic system, when the pressure suddenly increases, the backup ring acts like a barrier to protect the position and shape of the spring-energized seal and keep them stable.
It is used to seal the gap between the pump shaft and the pump body in various industrial pumps such as chemical pumps and oil pumps. During the operation of the pump, both the internal liquid pressure and the rotation of the pump shaft will have an impact on the seal. The spring-energized seal with a backup ring can effectively prevent liquid leakage and ensure the normal operation of the pump.
The spring-energized seal with a backup ring can be used for the sealing of rotating shafts in rotating machinery, such as compressors, centrifuges and other equipment. These devices usually have relatively high rotational speeds and may also have high internal working pressures. The spring-energized seal with a backup ring can adapt well to the high-speed rotation of the rotating shaft and changes in pressure, ensuring the tightness of the equipment.
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