A new series of powder hopper loaders is available from Motan, Inc., Plainwell, Mich. The Metro P family (15, 25, and 50 liters) is designed for safe, clean, 24/7 operation with very little maintenance. Type F is for free-flowing powders and Type N for non-free-flowing materials. They handle 200 to 1000 kg/hr (440 to 2200 lb/hr).
Made of electro-polished stainless steel, these units are designed to prevent bridging and formation of lumps. To refill the units, the discharge flap signals to actuate the vacuum valve. Since filter quality is key to powder loaders, they employ four to seven star-filter cartridges with PTFE coating. The filters are cleared by automatic air-jet dedusting about 1 sec before the end of the conveying cycle.