Vacuum cleaners ideal for use in difficult conditions, equipped with a cooling lobe pump which allows for a substantial vacuum level. This system is a suction unit to be combined with a pre-separator for material collection. The filter unit is composed of a main filter made of fabric which is electro-mechanically shaken and pocket shaped to reach a suitable surface.
The safety filter is a class M air filter cartridge. Diesel powering of the suction unit makes it operatively independent.