Screw Conveyor

Screw Conveyor designs and manufactures equipment for various industries such as Food, Pharmaceuticals, Chemical industries, Packaging industries, salt, cement, coal, biomass, agriculture, gypsum and other industries where there is a need for industrial duty equipment to convey free-flowing bulk materials.

Yagnam Pulverizer Screw Conveyors are available in many configurations. Screw Conveyors are designed based on industry standards and are modular in construction providing flexibility for a variety of applications.

Screw Conveyor has a constant volumetric capacity according to speed. It may be exposed to a head of material and by having a correctly designed flight and with variation in the speed can be used to control and feed equipment at a uniform metered rate down the process stream, eliminating surges in the process. In many situations, it is the only device that can be used as a feeder.

Screw Conveyor Operation

The flexible screw conveyor operation begins with product entering the sealed tube as the auger rotates. The shape, design style, size, and length of the auger are factors selected for each application. The screw conveyor is typically mounted to a hopper for easy loading of material. A single motor drives the auger rotation allowing the material to be pulled through the enclosed tube. The helicoid design of the auger effectively conveys a wide range of materials from powder, to granular, to larger particles.


Applications of screw conveyors:


Screw conveyors are bulk material transporting devices capable of handling great variety of materials which have relatively good flow ability. Flow ability find a CEMA material classification standard and denotes the degree of freedom of an individual material particles to move past each other. This characteristic is important in screw conveyor operation as the screw helix mounted on a central pipe or shaft, rotates within a fix trough or tube, pushes the material along the bottom and sides, sharing the material in the radial clearance between the helix and trough and causing the material to tumble upon itself as the moving face of the helical flight tends to lift the material.




  • Gentle product handling
  • Greater hygiene
  • Easy to clean
  • Total containment
  • Dust-free
  • Constant remixing
  • Low cost
  • Low maintenance


Screw Conveyor Advantages


The screw conveyor is one of the most cost-effective methods for transporting bulk materials. Screw conveyors are used in thousands of applications in almost every industry. YAGNAM PULVERIZER has provided successful bulk material handling solutions for over 20 years. If you have a difficult application, please Contact Us. We have the solution. From replacement parts to complete systems, YAGNAM PULVERIZER will meet all of your bulk material handling needs.


The screw conveyor has many advantages over other types of bulk material handling equipment.Some of the advantages are:


  • Screw conveyors are capable of handling a great variety of bulk materials from sluggish to free-flowing.
  • Screw conveyors can have multiple inlets and discharge points. Bulk materials can be conveyed and distributed to various locations as required. Slide gates or valves can be added to control the flow into and out of a screw conveyor.
  • When a screw conveyor is used as a metering device, it is considered a screw feeder. Screw feeders are used to initiate a material process by metering product from a bin or hopper.
  • Screw conveyors are very compact and adaptable to congested locations. Screw conveyors do not have a return similar to a belt or drag conveyor.
  • Screw conveyors are totally enclosed to contain the product and prevent spillage. Screw conveyors can be utilized in the horizontal, vertical or any inclined position depending upon the characteristics of the product being conveyed.
  • Screw conveyors can be used for mixing various products together and for breaking up large lumps.
  • Screw conveyors can be designed without a center pipe. This type of conveyor is called a shaftless screw conveyor and is designed for conveying wet, sticky, sluggish products such as industrial sludges and biosolids.
  • Screw conveyors can be used to cool, heat or dry products in transit. Depending on the heat transfer requirements, a screw conveyor can be jacketed, or a hollow-flight design utilized to provide the necessary heat transfer for the application.
  • Screw conveyors can be designed to be vapor-tight or hold an internal pressure. This is very important when conveying toxic or hazardous products such as those in the chemical industry.
  • Screw conveyors can provide an airlock between upstream and downstream equipment.

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