Eriez screeners and conveyors are specifically designed to feed, convey, or screen coal. The company’s HVF Mechanical Feeders are available in nine models with capacities to 1,300 tons (1182 MT) per hour of coal. The low-profile, rugged machines move high volumes of bulk material reliably and economically. Their compact design allows for more room around equipment, smaller tunnels under stockpiles and easier installation.The straightforward design of the HVF series incorporates a standard three phase motor mounted within the base. It is connected by belt to the factory set variable-pitch sheave that drives the eccentric shaft at approximately 1,100 RPM. The vibratory motion created by the shaft is amplified by the elastomer springs to which the tray is connected. Eriez’ Model HVC mechanical conveyors are simple, rugged vibrating machines that move high volumes of bulk materials over long distances, reliably and economically.