How to choose high quality seal ring

The high-quality sealing ring is provided with a metal coil spring. The metal coil spring has a large deformation range, so that the metal coil spring has a better support force for its outer jacket and strengthens the sealing ability. At the same time, it is on the jacket of the sealing ring. With U-shaped groove, metal spiral spring is stuck in the U-shaped groove. When the sealing ring is installed in the sealing groove, the initial sealing force is generated by the metal spring when the sealing ring is under low pressure and zero pressure. The jacket lip is in close contact with the sealing groove; when the system pressure rises, the inner cavity is filled with the medium to make the sealing lip more tension for better sealing power, and the main sealing force is formed by the system pressure.

Quality seal ring has the following conditions:

1. There is a metal coil spring inside the sealing ring. The metal coil spring has a large deformation range, so that the metal coil spring has a better supporting force for its outer jacket, and the sealing capacity is enhanced, and the sealing effect is better.

2, the sealing ring jacket is provided with "U"-shaped groove, the metal coil spring is stuck in the "U"-shaped groove, when the sealing ring is installed in the sealing groove, the sealing ring at low pressure and zero pressure, the initial The sealing force is generated by the metal spring, which urges the lip of the jacket to close to the sealing groove, thereby forming a seal. When the pressure of the system increases, the inner cavity is filled with the medium to make the sealing lip more tension to achieve better sealing power. Its main sealing force is formed by system pressure. Therefore, from zero pressure to high pressure can guarantee a good seal, the use of large pressure range, good sealing effect.

3. The jacket is made of PTFE mixture. The PTFE mixture has the properties of good chemical inertness and good temperature resistance (it can work continuously at 250°C). It is based on polytetrafluoroethylene and filled differently. The materials and different filling percentages can achieve different physical and chemical properties.

4. The spiral spring is an O-shaped spring formed by spiral wound flat plate. It is also called energy storage spring. It provides elasticity and compensation for the seal ring. The seal has permanent elasticity in the elastic range of the spring and can make up the wear of the outer ring material. And with the offset and eccentric parts, and is affected by the working temperature and pressure.

5. The cavity of the sealing ring at the spring can be filled with elastic rubber to prevent the dirt from entering the sealing body and can be disinfected. It can also be used in the occasions such as sludge, slurry or glue.