The RIBO COMPAIR suction units are characterised by the complete absence of electrical or electromechanical components and moving parts. The suction is generated by a flow of compressed air which, when conveyed through a suitably sized duct, creates a powerful Venturi effect. They are ideal to be used in particularly difficult or dangerous environmental conditions, on construction sites or in rooms where electrical power is prohibited or not available. They can be used both as mobile suction and filtering units with containers of various sizes, and as fixed units for centralised vacuum systems and pneumatic conveyors (also with loading hopper).