The lock feeder is a device of a continuous action. It provides dust discharge with non-destructive tightness of the apparatus. At the cost of applying of renewable liners made of elastic wear-resistant material, a firm adherence to the walls of the chamber is ensured as well as the gate sealability. Lock feeders are intended to batch free-pouring powdered grainy materials (the size f the grain is not more than 10 mm) with the surface moisture not more than 1,5% and poured density not more than 1,8g/cm³ as well as to discharge the accumulated material from bins, cyclones, silo, etc.
They are applied for equipping the grinding complexes KI and classifying complexes KK.
Lock feeders of OJSC «NPO Center» production are more simple in construction and servicing and on the whole are more reliable in operation.
At the present time there have been developed 9 modifications of two standard sizes with the productivity from 3 up to 40 m³/hour.