Case Study: Solving High-Capacity Flour Screening Challenges with the Sivtek Centrifugal Sifter
Overview
A large-scale flour processing plant, which was supplying bakeries, food manufacturing and retail flour distributors, was operating a continuous wheat flour production line. As production demand increased, the existing sieving stage — handled by conventional vibro separators — started creating major operational instability.
Production consistency between shifts was being impacted by mesh blinding, recurring downtime, dust generation and throughput limitations. What had once worked adequately at moderate capacity had become the weakest point in the process line.
The requirement was to provide a high capacity flour screening solution that can operate at a steady rate without impacting on process stability and hygiene whilst in operation.
The Challenges
Persistent Mesh Blinding
The facility’s biggest challenge was continuous mesh blinding during flour screening. Fine wheat flour — because of its low bulk density and cohesive particle behaviour — progressively accumulated on the screen surface during operation. As mesh openings became blocked, effective screening area reduced, throughput dropped, and flour consistency became increasingly unstable.
Manual mesh cleaning caused the production line to be stopped many times during the process. These interruptions impacted the entire downstream process: from filling consistency in the silos through to the efficiency of the packing machine and the targets for shifts’ production.
Unplanned Downtime Across Production Shifts
The issue was not occasional maintenance stoppages. Production interruptions were occurring multiple times during every shift. In continuous operation mode, such downtime built up and made planning production activities increasingly difficult. The current flour sieving machine was unable to provide consistent and stable throughputs over long production runs.
Dust Generation and Hygiene Concerns
At the same time, during operation, the conventional vibratory screening machines were open constructions, which led to the loss of fine flour dust into the processing environment. This generated hygiene problems, potential operator exposure and loss of product around the screening area. Maintaining food-grade processing conditions became increasingly challenging under high-throughput production.
Throughput Limitation at Higher Volumes
With the production goals rising, the current vibro separators were unable to meet the production demands. The addition of more screening machines was thought of but due to floor space and the increasing complexity of operation it was not a possibility. The requirement was to find a compact industrial flour sieving solution with high throughput performance.
The Assessment
Galaxy Sivtek’s application team conducted a detailed assessment of the production line, evaluating flour characteristics, required throughput, existing process limitations, and layout constraints.
The assessment confirmed that conventional vibratory screening technology was fundamentally mismatched to the demands of continuous high-capacity flour processing. The conventional vibration screening systems use gravity and oscillating motion to transport flour fines over a flat mesh surface. But at high feed rates, this feature is a natural consequence of the technology and not just a maintenance problem: the risk of mesh blinding is high, as is the risk of unstable throughput.
Galaxy Sivtek suggested the replacement of the existing setup with a centrifugal flour sifter having a special design for continuous high volume screening of the powder.
The Solution — SIVTEK Twin Roto Sifter 1350
To handle the operational challenges, Galaxy Sivtek installed the SIVTEK Twin Roto Sifter 1350. It s a twin-chamber centrifugal sifter built for high-capacity screening of fine, low bulk density powders such as wheat flour.
Unlike conventional vibro separators, the centrifugal screening mechanism actively propels flour against a cylindrical mesh screen using rotating beaters inside an enclosed chamber. This forced feed action keeps pushing material through the mesh, hence virtually eliminating the blinding of the mesh which has been causing trouble in production.
The twin-chamber design distributes material flow across two screening chambers simultaneously, enabling the machine to process up to 40 tonnes per hour while maintaining stable screening performance throughout continuous operation.
The fully enclosed construction eliminated airborne flour dust during operation, improving hygiene conditions throughout the production area. The system was installed on the existing production line in the facility with minimum changes in the layout. A stainless steel finish throughout has been used, which met the hygiene and food safety standards at the facility.
The Results
The operational improvements were visible immediately after installation.
Significant Reduction in Production Downtime
Recurring production interruptions caused by manual mesh cleaning were virtually eliminated. The centrifugal beater action ensured that there was no flour accumulation on the mesh surface and the facility was able to screen flour without manual cleaning throughout production hours. This decrease in unplanned downtime at screening has created more reliability and consistency in production planning to work every shift.
Stable High-Capacity Throughput
The Twin Roto Sifter 1350 consistently delivered flour screening performance over longer production cycles. As opposed to using the vibro separators before, the flour sifting capacity remained consistent over the entire period, thus improving the efficiency of the production and packaging processes.
Dust-Free Flour Screening Environment
Airborne flour dust in the sieving area was eliminated by the enclosed screening system, which also minimized the exposure of the operator to the dust in the processing area and created a more hygienic environment. This improved the food safety compliance at the facility and also brought a cleaner and safer production operation.
Simplified Operation and Compact Installation
The SIVTEK Twin Roto Sifter 1350 replaced multiple conventional screening units within a significantly smaller operational footprint. The facility eliminated the need for multiple maintenance points, made monitoring easier, and created more consistent flour screening process with a single integrated centrifugal sifting system.
Conclusion
This case illustrates a situation that is becoming more frequently found in today’s flour processing practices: conventional vibratory screening systems have difficulty when production volumes increase to an industrial scale.
The plant was able to minimize downtime, prevent mesh blinding, enhance the sanitary environment, and achieve a consistent screening of flour production process throughout the shifts by replacing the existing setup with the SIVTEK Twin Roto Sifter 1350.
At high-capacity flour processing centers, selecting the right industrial flour screening solution isn’t just about separation efficiency, it’s about achieving stable throughput, reliable operation and consistent production quality throughout an entire process line.
Galaxy Sivtek provides advanced sieving, screening and filtration solutions for flour processing facilities and food manufacturers across global markets.
If mesh blinding, downtime, or throughput inconsistency is affecting your flour screening operation, it is time to evaluate a better approach. Talk to Galaxy Sivtek’s experts and find the right solution for your production line.
