Venturi blowers are used to extract or ventilate hazardous vapours and cool spaces in reservoirs, laboratories, refineries, chemical plants and metal fabrication industries. These blowers can effectively reduce the air pressure flowing through a constricted section of pipe and are therefore ideal for cooling purposes in confined spaces. Venturi-style pneumatic air blowers come in various materials, base diameters, external duct lengths and overall lengths. Venturi air blowers have either a metal or a plastic housing for safe and reliable air transfer (metal Venturi blowers offer higher air flow as compared to their plastic counterparts). Raptor Supplies is an authorised distributor of high-quality Venturi blowers from Allegro and Air Systems International.