Commercial vehicles are equipped with diesel engines, which consume much more air than engines of passenger cars; moreover annual run of such technique is several times bigger.

That is why air heavy duty filters are characterized by big sizes (size of filtering element can be up to 10 m2) and there are always used strengthening elements in their construction.

In order to provide long life for engines of commercial vehicles their filters have much higher requirements.

For filtering element of such filters production there is used filtering paper on cellulose base, as well as perforated metal nettings, metal caps and gaskets made of durable rubber.

Nowadays in connection with environment preservation norms in force the metal parts are replaced with plastic, because metal parts utilization is more expensive and troublesome.

Metal bottom caps are replaced with polyurethane gaskets. Filters are designed in such way that bottom caps are pressurized inside housing, this construction eliminates using of rubber gaskets.