Screw Conveyors
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What is Screw Conveyors Machines?
A screw conveyor or auger conveyor is a mechanism that uses a rotating helical screw blade, called a “flighting”, usually within a tube, to move liquid or granular materials. They are used in many bulk handling industries. Screw conveyors in modern industry are often used horizontally or at a slight incline as an efficient way to move semi-solid materials, including food waste, wood chips, aggregates, cereal grains, animal feed, boiler ash, meat and bone meal, municipal solid waste, and many others. The first type of screw conveyor was the Archimedes’ screw, used since ancient times to pump irrigation water.
Screw conveyors are used to convey the material continuously with the help of a rotating helical screw blade (known as flights) by shear and tumbling effect inside a U shaped trough or a round tube. They are generally used for handling fines of coal, crushed material, powders, cement, chemicals etc.
Technical Specifications
- Standard screw conveyors are made out of carbon steel or stainless steel depending on the operating conditions.
- Sizing of screw conveyor and pitch of flight is determined with the reference to CEMA standards.
- Intermediate hanger bearings are provided for long conveyors for the screw to maintain allowable sag in the rotating member.
- Proper selection of angular speed for the Screw conveyor is critical in order to avoid wobbling effect during operation.
- The tough filling factor is selected according to nature of material and also with reference to CEMA standard with typically value of around 30%, however, the drive power rating is calculated based on 100% filling factor.
- For high temperature application a jacketed trough and box type flights are provided with circulating cooling water through, shaft & box flights. The quantity of cooling water depends on the properties & temperature of conveying material.
Specifications of Screw Conveyors Machines
We refer to CEMA standards for sizing, power calculation and construction of screw feeders/ conveyors.
- Screw feeders are supplied with variable pitch.
- Standard screw flights are continuous, however, variation in Screw conveyor flights can be provided depending upon the properties of the Material to be handled – e.g. Cut Flight; Cut & Folded Flight & Ribbon Flight.
Features of Screw Conveyors Machines
Trough Conveyor
- These conveyors are fabricated in Mild Steel and / or Stainless Steel material.
- The conveyors are dust sealed with felt, ‘O’ rings or oil seals.
- Designed for Pressure and vapor-tight requirements.
- Hard facing on carrying side of flight with 350-400 BHN hardness
Screw Conveyor Manufacturers
Raman Systems, headquartered in Mumbai, is a leading manufacturer and supplier of screw conveyors. Renowned for their commitment to excellence, they specialize in delivering top-tier screw conveyor products meticulously crafted to meet the needs of various industries. Their extensive range ensures superior quality and reliable performance, catering to diverse industrial applications. With a focus on innovation and precision engineering, Raman Systems remains the preferred choice for businesses seeking the finest paddle dryers to optimize their operations.