The compressed air vacuum cleaners series “AD” are suitable where electricity is either absent or prohibited , working with compressed air and being free of moving . The vacuum is created by a “venturi” system. Versions X1-X2-X3 can be used in hazardous areas classified zone 21-20 internally: marking EX II 2/1D. They are equipped with an ejector Venturi, star fi lter Ø 360 (antistatic version for ATEX) and removable 25 liter container, made of stainless steel for ATEX versions. With its compact size, it is the smallest model of the range of compressed air machines.