Move High Volumes of Bulk Material Evenly and Efficiently with The En-Masse Drag Conveyor

c-pathChoose a Hapman En-Masse drag conveyor when your capacity requirements are measured in tons/per hour and distance demands range from 20 to 200’ or more. En-Masse drag conveyors are the best choice in a wide range of conveying applications; from minerals and mining, to power utilities, to chemical plants, and to building materials. This conveyor offers you the most trusted conveying technology coupled with unprecedented durability and limited maintenance requirements.

Hapman En-Masse Drag Conveyor

The En-Masse drag conveyor is often referred to as a drag conveyor but the operation of the En-masse drag has very important distinctions. The typical drag conveyor operates using a paddle or scraper that runs along the bottom of the conveyor housing. The design of the paddles and the ratio of conveying area to material volume means the material in a drag conveyor moves forward in a tumbling, turbulent manner. Unlike the drag conveyor, the En-Masse drag conveyor moves material in a large, single, stable mass, resulting in a smooth, gentle movement of material.

The En-Masse drag operating principle affords significant advantage over other conveying methods:

  • Size to capacity ratio - A typical belt conveyor uses 20-25% of available conveying space to effectively move material. A typical drag or paddle conveyor uses 45-50% of conveying space, while the En-Masse drag conveyor uses 90% of the available conveying space to effectively move material. This means the overall size of the En-Masse drag conveyor is greatly reduced when compared to other conveying technologies moving the same volume.
  • Ability to handle product in many conveyor configurations – Horizontal, Inclined, Vertical, L-path, Z-path, and looping.
  • Ability to convey over long distances – En-Masse drag conveyors can effectively convey material across terrain and cover X.
  • Engineered for a wide range of bulk material – From Ash to Zinc the En-Masse drag conveyor design allows for large volumes of material to be moved effectively

next: Features of En-Masse Drag Conveyors


Flight Options

These flight options represent the most common designs. Other styles are available. The T- and BT-style flights are used for horizontal through slight incline applications, normally between 0o to 12o. The U-style can be used for horizontal/incline combinations through approximately 25o. The modified BT, O, OO, and OO with filler plates are utilized in horizontal/inclined applications through 90o.

next: En-Masse Drag Conveyors Options


Layout and Design

Conveying with an En-Masse drag conveyor affords you the ability to move large volumes of material in virtually any direction or layout. The flexibility in engineered design means we can provide the optimum conveyor layout to achieve all of your material handling and operating goals.




next: Features of En-Masse Drag Conveyors


En-Masse drag conveyors have a capacity range of 2 STPH up to 1000 STPH for single strand conveyors. Larger capacity requirements can be handled using a double strand conveyor.
Click to Enlarge any figure.


Nominal Dimensions for Horizontal Conveyors

L Path specs

Typical L-Path Dimensions for Normal Medium Duty Conveyors


Typical Horizontal Dimensions for Normal Medium Duty Conveyors

next: Chain and Flight Design

It's All in the Chain and Flight Design

The internal chain is the work horse of our En-Masse drag conveyor. Understanding the design characteristics will help you to understand why our chain is engineered for durability, reliability and longevity.

  • Impact and Wear Resistance – Our chain is case hardened with a strong ductile core. This engineered balance between hardness and malleable provides the right wear resistance without becoming brittle.
  • Fatigue – A chain designed to proportion the steel where needed coupled with dropped-forged steel alloy links constructed to avoid premature wear
  • Bearing Surfaces & Finish – Precision machined with tight tolerance, our bearing and surface finish process significantly limits joint articulation wear
  • Manufacturing Techniques – We maintain strict dimensional tolerances and documented quality control procedures. We select the proper alloys for the application and have a proven system in place to verify production according to standards.
  • Flight Attachment Method – Welded and bolted
  • Chain Weight and Pitch – We specifically develop and design for En-Masse drag conveying operations providing the appropriate strength to weight ratio for optimum durability and longevity

Our drop-forged conveyor chains and flight assemblies are specifically engineered for En-Masse drag conveying applications and provide superior longevity over other designs.