Hi-Vac 250 connected to a manifold system now serves two molding areas. Major jobbing foundry has purchased Hi-Vac for each of its six foundries. Units are used for cleanup of shot, sand, sea coal, sludge, etc. In four hours, two men can now clean out an area that had taken four men a week. Coal company handles troublesome dust from ground and pulverized coal with a Hi-Vac Model 250.
Material is too light to sweep and floats when wet.
Coal is now vacuumed for use as carbon black. Quarry uses Hi-Vac Model 230 to vacuum out cloth dust collectors before installing new filter bags. Glass manufacturer utilizes a Hi-Vac Model 250 on production line to empty and refill refractory molds. Giant cement plant uses 14 Hi-Vacs to keep cement dust under control. Vacuumed material is easily reclaimed.