Stainless Steel Screw Conveyor

The Voson Stainless Steel Screw Conveyor provides enclosed transfer of flour, bran, starch and other processed powders between storage, milling, blending, weighing and packing equipment. Tubular and U-trough designs are available for horizontal or inclined installation in new flour mill plants and existing line upgrades.

Each conveyor is configured around the material, required capacity, conveying distance, lifting height and connection points. The casing, screw diameter, drive and controls are coordinated with the upstream and downstream equipment to maintain stable material flow while helping reduce dust and product loss.

Product Overview

Item	Available Configuration
Conveyed materials	Flour, bran, starch, premixed powder and similar processed products
Reference capacity	2–75 t/h, subject to material and installation conditions
Casing structure	Tubular or covered U-trough
Installation	Horizontal or inclined
Product-contact construction	Stainless steel; grade and scope confirmed for each project
Drive and control	Fixed speed or variable-speed control
Customization	Diameter, length, inlet, outlet, support frame and connection dimensions

This product is intended for enclosed flour and powder handling. For a general-purpose grain conveyor used with wheat, maize, rice and other bulk materials, see the TLSS spiral conveyor.

Available Screw Conveyor Configurations

Tubular Screw Conveyor

A tubular screw conveyor uses a round enclosed casing. Its compact structure is suitable where dust containment and a sealed conveying route are the main priorities. It is commonly used between a flour bin and downstream processing or packing equipment.

U-Trough Screw Conveyor

A U-trough conveyor uses a removable top cover, providing easier access to the screw and conveying chamber for inspection and cleaning. Multiple feeding or discharge points can be arranged when the production process connects several machines.

Horizontal and Inclined Installation

Horizontal installation is normally used between equipment at similar elevations. Inclined installation transfers material to a higher bin, mixer or packing system. Because capacity can decrease as the conveying angle increases, the final model must be selected using the actual lifting height, total length and material flow characteristics.

Key Features for Flour Mill Plants

• Enclosed conveying helps control flour dust and reduce product loss.
• Stainless steel product-contact construction provides corrosion resistance and supports cleaner material handling.
• Tubular and covered U-trough structures are available for different cleaning and layout requirements.
• Inlet and outlet positions can be customized to match bins, mixers, weighing systems and packing machines.
• Removable covers, inspection openings and cleanout access can be arranged according to the cleaning procedure.
• Supporting frames and connection dimensions can be designed around the equipment elevation and available floor space.
• Variable-frequency drives, level sensors and electrical interlocks can coordinate the conveyor with upstream and downstream equipment.

The required stainless steel grade, surface finish and scope of stainless steel construction should be confirmed before manufacturing. Material-contact parts and non-contact frames do not have to use the same construction unless specified by the project.

Reference Technical Parameters

Model	Reference Capacity (t/h)	Motor Power (kW)
TLSS160	2–6	0.75–1.5
TLSS200	4–12	1.5–3
TLSS250	7.5–23	1.5–4
TLSS300	13–37	3–4
TLSS400	20–53	3–5.5
TLSS500	25–75	5.5–11

These figures are reference ranges rather than guaranteed capacities for every powder. Actual output and motor power depend on bulk density, moisture, flowability, conveyor length, installation angle, screw pitch, speed, filling ratio and inlet loading condition.

For flour applications, Voson confirms the final screw diameter, rotational speed and drive power using the actual material data and plant layout.

Applications and Equipment Integration

The stainless steel screw conveyor can be installed at several positions in a flour processing line:

1. Transfer finished flour from a collection hopper to a storage bin.
2. Feed flour from a bin into a blending or batching system.
3. Convey blended flour to weighing and packing equipment.
4. Discharge bran and milling by-products from a buffer hopper.
5. Transfer starch or premixed powder between processing stages.
6. Provide controlled discharge beneath a bin or silo.

It can be connected with flour collection hoppers, buffer bins, blending machines, micro-ingredient systems, weighing equipment and automatic packing machines. In wheat flour milling plants, connection elevations, flange dimensions and control sequences should be coordinated before manufacturing so the conveyor fits the complete process flow.

Selection and Customization

Selecting a flour screw conveyor requires more than matching a nominal capacity. Fine flour, coarse bran, starch and premixed products behave differently inside the same casing. To prepare a suitable configuration and quotation, provide:

1. Material name and bulk density, if available.
2. Required conveying capacity.
3. Horizontal conveying distance and vertical lifting height.
4. Installation angle and available space.
5. Number and position of feeding and discharge points.
6. Upstream feeding condition and downstream equipment capacity.
7. Cleaning frequency and product-change requirements.
8. Required stainless steel scope and local power supply.

Voson can then configure the casing structure, screw diameter, pitch, conveying speed, motor power, supporting frame and inlet and outlet arrangement. This engineering approach is suitable for new flour mill projects, production-line expansions and replacement of existing conveying equipment.

Frequently Asked Questions

Where is a stainless steel screw conveyor installed in a flour mill?

It can be installed beneath collection hoppers and bins, between flour storage and blending equipment, before weighing and packing machines, or in the bran and by-product section. The correct position depends on the production flow.

Which design is easier to inspect and clean?

A covered U-trough conveyor generally provides easier access to the screw and conveying chamber. A tubular conveyor offers a more compact enclosed structure but may require specifically arranged inspection or cleanout openings.

Can one conveyor handle both flour and bran?

The same conveyor type may be used, but flour and bran have different bulk densities and flow characteristics. Screw diameter, pitch, speed and motor power must be checked for the actual material.

Can the conveyor feed an automatic packing machine?

Yes. It can transfer flour to a buffer bin or packing system. Variable-speed control, level sensors and electrical interlocks can coordinate material feeding with the packing equipment.

How does inclined installation affect capacity?

Effective capacity normally decreases as the conveying angle increases because material tends to fall back inside the casing. Lifting height, conveyor length, screw speed and material flowability must therefore be considered during selection.

Is the complete machine manufactured from stainless steel?

The construction scope is project-specific. The casing and screw can be manufactured as stainless steel product-contact parts, while the supporting frame and other non-contact components can be specified separately. Confirm the grade and scope before ordering.

To receive a configuration and quotation, send Voson the conveyed material, required capacity, conveying distance, lifting height, inlet and outlet positions and plant layout when available.