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What is the functional difference between a Drag Chain and En-Masse Conveyor?

Efficient Operating Principle of Drag Chain

The principle operation of a drag conveyor is based on material movement using a skeletal chain and flight assembly that is drawn along the bottom section of an enclosed housing. Drag conveyors are an optimum choice for bulk processors, power producers, cement manufacturers and minerals processors for the conveying efficiency and enclosed housing.

Unlike a belt conveyor, a drag conveyor uses nearly 50% of the available space inside the conveyor housing for material movement, a belt conveyor only uses about 20%. This means that a greater volume of material can be moved in a smaller housing, at slower speeds and with less horsepower. Slower chain speed means less wear, and less horsepower equals lower energy requirements and operating costs.

En-Masse Drag Chain Conveyor Illustration | Hapman.comEn-Masse Drag conveying works by pulling a single strand of endless chain centered in an enclosed housing with flights attached on both sides of the chain (skeletal looking) through a rectangular section of a bulk solid material.

The bulk solid is conveyed by the motion imparted on the bottom surface of the trough by the chain and the shear friction between the particles of the bulk solid material conveyed. The En-Masse drag conveyor is not limited to conveying En-Masse, there are many applications where the bulk solids capacity that is required or the conveyor configuration isn’t practical, but in a lot of these cases the single chain strand with skeletal flights is a very good and reliable solution for conveying needs. In other words, EnMasse drag conveying is one type of operating principle of a Drag Conveyor.