The PTFE seal is a very attractive sealing material because of its low friction. Especially noteworthy, it also has very little dry friction on steel. If it is a Teflon oil seal with a contact surface, one drawback can be overcome. At the same time, the contact surface can also be formed with a positive effect of the backward pumping effect to maintain a high sealing efficiency. The fluoroethylene seal is sandwiched between the collar and the metal casing, and the sealing portion itself has a positive action hook. This oil seal is also made with a second lip.

Second, we pay attention to the change in temperature when the temperature is below minus 200 degrees Celsius. The PTFE seal will become brittle. Pure PTFE sealing ring is a kind of clean sealing product, which will not pollute any substances it touches. It can be widely used in mechanical washers, flat washers and piston rings. Ball valve gaskets and the like have good characteristics such as corrosion resistance, high temperature resistance and medium resistance.

The friction of the seal and sealing surface depends on many factors: surface roughness, surface characteristics, pressure, media, temperature, seal material, seal form and operating speed. The seals used are of different materials. The high temperature and low temperature comparisons described are not the same. A series of performance effects are required. For pistons and piston rods operating at different temperatures, separate them separately.