Screw Conveyor

Where It Is Used

• Powders, granules and small lumps — grain, flour, feed, cement, chemical powders and plastic pellets.
• Pasty, sticky and sludge materials in shaftless screws.
• Chemical and powder dosing, conveying and discharge; food, grain and feed handling; building material and mining; environmental and sludge dewatering duties.
• Duties that need enclosed, dust-contained conveying.

Key Features

• An enclosed housing helps contain material and dust. Corrosive materials and hazardous areas require a separate assessment of materials, sealing and protection measures.
• Compact and available horizontally, inclined or vertically: small footprint, with multiple infeed and discharge points.
• Handles dry to semi-fluid and sticky materials; shaftless designs suit viscous sludge and blockage-prone duties.
• Relatively low cost and easy to maintain; can double as dosing or feeding where a dedicated screw feeder is used.

Selection Notes

• Inclined conveying can reduce capacity and increase power demand; steep or vertical duties require a suitable screw and housing design.
• Large lumps, fragile, strongly abrasive or tangling materials jam, wear or break — confirm against a material table.
• Sticky or bridging materials need shaftless or special flight designs; standard shafts tangle and block.
• Hanger bearings, flights, ends and seals are hygiene dead spots; food and pharmaceutical duties need cleanable designs, confirmed per project.
• Not a flexible-router conveyor: long runs usually favour belts, so it is not used for arbitrary paths.