The most important purpose of the Air Filter is to ensure that the engine is adequately protected against wear in any possible dusty environment. The dust separation capability of the filter must be appropriate. The most important part of the air filter is the filter elements made of high-grade cellulose fibers. Another important filter element in panel and round type air filters is polyurethane. Air filters absorb the smallest micronic dust with little resistance to the air flow. Small and light heavy-duty air filters are used in engines operating in very dusty environments, especially in construction machines. Thanks to these filters, vehicles with powerful engines will not be affected by dusty environments, so the air going to the system keeps the combustion efficiency high and does not cause problems in the operating conditions of the vehicle.