NNP Screw conveyor

• Transporting bulk solids and powders horizontally or at an incline in food processing.
• Moving granular materials such as grains, seeds, or feed in agricultural settings.
• Conveying dry ingredients like flour, sugar, or spices in bakeries and ingredient plants.
• Handling waste products or by-products in various industrial processes.

Typical throughput

Throughput for this class of equipment varies significantly based on material density, screw pitch, and rotational speed, commonly ranging from 1 to 20 cubic metres per hour.

Power supply

Units of this type commonly require a 400V, 3-phase electrical supply, with motor sizes typically between 2.2 kW and 7.5 kW depending on length and material.

Material of construction

For food and pharmaceutical applications, stainless steel (e.g., 304 or 316) is standard for all product contact parts to ensure hygiene and corrosion resistance.

Footprint

The footprint is primarily determined by the screw length and motor position. For a unit with a 4800mm screw, the overall length would be approximately 5000-5500mm, with a width of around 400-600mm.

Suitable feed sizes

Screw conveyors are generally suitable for fine powders to small granular materials, typically up to 25mm in diameter, depending on the screw design and trough clearance.

Maintenance requirements

Routine maintenance typically involves checking bearing lubrication, inspecting the screw for wear, and ensuring motor and gearbox are functioning correctly. Cleaning schedules depend on the material conveyed.

• What types of materials can this screw conveyor handle?

  This type of screw conveyor is primarily designed for free-flowing to semi-free-flowing bulk solids, powders, and granular materials. It is less suitable for sticky, abrasive, or extremely fragile products.

• Can this conveyor operate at an incline?

• What are the common wear parts on a screw conveyor?

• Is this unit suitable for food contact applications?

• How is the capacity of a screw conveyor typically controlled?

Food processing conveyor systems are valued for their reliability and durability in demanding environments. Buyers typically prioritise belt condition, motor functionality, and frame structural integrity when purchasing used units. Industry feedback highlights their robust construction and ability to handle continuous operation across multiple shifts. Key considerations include compatibility with existing production lines, ease of cleaning for food safety compliance, and availability of spare parts. Well-maintained systems often provide excellent value, though thorough inspection of wear components before purchase is advisable.

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