Hebei Hankai double lip seal
One common type of oil seal is the lip seal, which features a flexible lip that makes contact with the rotating shaft to create a tight seal. Lip seals are often used in automotive engines, gearboxes, and industrial pumps due to their effectiveness in preventing oil leaks. Another popular option is the mechanical seal, which uses a rotating element to maintain constant contact with the shaft, ensuring a reliable seal even at high speeds and pressures.
20 30 7 oil seal

In the context of HPMC, the term “high viscosity” is relative and context-dependent. Generally, the industry recognizes HPMC with viscosity values above 100,000 mPa·s as high viscosity. It is important to note that 100,000 mPa·s may be a high viscosity value for one application, but 100,000 mPa·s may be a standard viscosity or even a low viscosity for another application. Although we mentioned above that there is a range of viscosities, the so-called high and low viscosities need to be compared to a corresponding application.