What is a backward curved centrifugal fan? The backward curved centrifugal fan design uses the centrifugal force generated by a rotating disk, with blades mounted at right angles to the disk, to impart movement to the air or gas and increase its pressure. The assembly of the hub, disk and blades is known as the fan wheel, and often includes other components with aerodynamic or structural functions. The centrifugal fan wheel is typically contained within a scroll-shaped fan housing. How does a backward curved centrifugal fan work? Backward cu...
Local Exhaust Ventilation, or LEV, is a recommended method of shipyard ventilation. The nature of the shipbuilding industry means that air quality can be poor due to the presence hazardous chemicals, dust and welding fumes. To ensure workers are not exposed to these potentially harmful substances in often confined working spaces, LEV systems are key. LEV involves trapping airborne contaminants at their source before they pollute the air that is breathed by workers. For welding, cutting and heating processes, this type of ventilation must con...