20 32 6 oil seal
Shaft oil seals typically consist of a flexible sealing lip made from elastomeric materials such as rubber, polyurethane, or silicone, encased in a sturdy outer shell. The sealing lip makes contact with the rotating shaft, creating a barrier that effectively retains lubricants while blocking unwanted particles. The design may include additional features such as garter springs to maintain contact with the shaft and improve sealing effectiveness over time.
shaft oil seal



Another important category is the gas-phase filter, which targets gaseous pollutants such as volatile organic compounds (VOCs), sulfur dioxide (SO₂), and nitrogen oxides (NOₓ). These substances pose significant health risks and contribute to the phenomena of smog and acid rain. Chemical sorbents, such as activated carbon, zeolites, and silica gels, are commonly used in gas-phase filters to adsorb or react with these harmful gases, thus preventing them from entering the atmosphere.
gas filter
