In some places, electrical power is not accessible or forbidden because of specific directives as the ATEX one. In such cases, compressed air represents an alternate source of power which is also often available in large quantities. Compressed air vacuum cleaners are the perfect solution for these environments. Delfin produces a wide range of compressed air vacuum cleaners powered by Venturi units, characterized by low air consumptions. These machines represent an excellent solution for dust, solids and liquids suction when electrical power is not accessible or limited.