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Description of the selection of step seal material
Selection of stepped seal materials We have made a lot of introductions on the selection of seals. In this issue, we mainly introduce the material selection of step seals, mainly considering the following aspects:
1. As the pressure of the sealing fluid medium increases, the stress of the mother Von MIKCS in the o-ring seal increases rapidly and exceeds the stress TL in the step seal.
2. The contact width between the stepped seal and the piston rod increases with the increase of the pressure of the fluid medium, and has little effect on the hardness of the o-ring.
3. According to the hardness of the seal ring, the influence of the radial force of the seal. Use a hard o-ring seal. It is more conducive to the sealing ability of the combined seal:
4. Although the energy consumption per unit area decreases as the pressure of the fluid medium increases, the power consumption of the wiper of the step combination seal x increases, and generates a large amount of heat in the friction contact zone. Therefore, the choice of PTFE material as the material for the step seal is correct.
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