double wiper seal

rear hub oil seal. Oil may begin to leak out of the hub, leading to low oil levels and potential damage to the hub components. The hub may also become contaminated with dirt and debris, causing increased wear and potential failure of the bearings and other parts.
In addition to reducing friction, hydraulic piston oil seals also help maintain the cleanliness of the hydraulic fluid. By sealing the piston chamber, these seals prevent dirt, debris, and other contaminants from entering the system and causing damage to the hydraulic components. This is particularly important in industries where hydraulic systems are exposed to harsh environments or heavy use.
hydraulic piston oil seals



The lifespan of solar panels is another crucial consideration, as their longevity directly impacts their overall efficiency and economic viability. Most solar panels come with warranties ranging from 20 to 25 years, during which they are expected to maintain a certain level of performance. In practice, many solar panels can continue to function effectively beyond their warranty period. Research has shown that high-quality panels can operate for 30 years or longer, although their efficiency may gradually decline over time. Typically, solar panels lose about 0.5% to 1% of their efficiency per year, meaning a panel that starts at 20% efficiency could still achieve around 80-90% efficiency after 25 years of use.
solar panel lifetime efficiency
