Low volume-high velocity exhaust systems
The Low volume-high velocity (LVHV) exhaust system is a unique application of exhaust which uses small volumes of air at high velocities to control dust from portable hand tools and machining operations. Control is achieved by exhausting the air directly at the point of dust generation using close-fitting, Custom-made hoods. Capture velocities are relatively high but the exhaust volume is low due to the small distance required. For flexibility, small diameter, light-weight plastic hoses are used with portable tools. This results in very high duct velocities but allows the application of local exhaust ventilation to portable tools which otherwise would require larger flow rates and large dust sizes when controlled by conventional exhaust methods. The resulting additional benefit is the reduction of replacement air requirements.