Compared with rubber oil seals, PTFE oil seals have more advantages
1. The rubber oil seal adopts a sharp lip that is compressed by a spring, and the contact surface with the shaft is only 0.3-0.5mm wide. The PTFE oil seal adopts a spring-free wide lip dynamic structure, and the contact surface with the shaft is 5-7mm wide, so that it can It maintains a sufficient oil film and is not sensitive to the eccentricity of the shaft. It can still work normally under the working condition of 0.4mm radial runout.
2. The inner wall of the PTFE oil seal is engraved with a thread groove opposite to the shaft rotation. When the shaft rotates, an inward thrust is generated to prevent the fluid from flowing out. This thrust is so high that it can seal 1.0MPa (single lip), 3MPa (double lip) fluid pressure, and the rubber oil seal is only 0.03MPa.
3. The anti-friction property of the PTFE oil seal is especially suitable for working with no oil or less oil. Even if it is restarted after a long-term shutdown, it can immediately have low friction characteristics.
4. The PTFE oil seal is especially suitable for high-speed rotation applications, and the speed can reach 30m/s.
5. Teflon oil seal can achieve no leakage.
Post time: Aug-13-2020