Smear a little gasket sealant round the cover flange and fit the new gasket to it. Make sure it is flat and straight.
PTFE, which is used in the well-known brand Teflon®, is less commonly used, but it is the preferred material for specific rotating seals in the chemical, food and pharmaceutical industries. This material is notable for having a very low frictional resistance and the best chemical resistance. It can also withstand a very wide range of temperatures in these types of seals; -80 ˚C to 200 ˚C. The shafts on which oil seals with PTFE lips are used require a harder and finer finish. Something like an axle sleeve can also be used to meet this requirement.
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Engineers showcased how it could optimize fuel consumption, leading to better fuel economy and reduced emissions – a timely solution amidst growing environmental concerns Engineers showcased how it could optimize fuel consumption, leading to better fuel economy and reduced emissions – a timely solution amidst growing environmental concerns
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Oil seal materials
Polytetrafluoroethylene (PTFE, Teflon®)

oil seal 20 34 7. Its dimensions indicate that it has a 20mm inner diameter, a 34mm outer diameter, and a 7mm width. This size is suitable for a variety of applications and can be easily installed in most types of machinery.

Type (type code)
Heat resistance
When the bore and shaft centers are misaligned, seal life will be shortened because the wear will be concentrated on one side of the sealing lip.
Aluminum alloys and resin (materials with a large difference between the linear expansion coefficients) demand sufficient consideration (as there is a risk of failure due to the increased clearance with the oil seal at high temperatures).