Customized Sieving & Screening: Wheat Flour Handling for Biscuit Production

In the biscuit industry, product quality begins long before dough hits the oven. Every single step in the wheat flour processing journey — from bulk storage to the final mixing — plays a crucial role in determining the texture, taste, and consistency of the biscuits. With the growing interest in hygienic, efficient, and contamination-free processing, sieving and screening technologies applied at a higher level have become particularly indispensable.

Bulk wheat flour and other ingredients like powdered sugar, starches, and milk powder are often received in silos. Though a silo provides controlled storage, transferring material to the plant has a contamination risk. That’s why the journey from silo to mixing is critical — and where Galaxy Sivtek’s Powder Transfer System (PTS), Vacuum Sivtek, and Sivtek Pressure Screen deliver unmatched performance in efficiency, hygiene, and precision.

Powder Transfer System (PTS) — sealed, reliable conveying

The PTS converts silo discharge into a closed, dust-free feed to your process. It uses pneumatic conveying (venturi / blower / vacuum pump options) and includes a suction wand, PTS hopper, and vacuum pump as required by layout.

Key, brochure-backed specs and points:

• Capacity range: typically 100–5,000 kg/hr (higher on request).
• Construction: the material-contacting parts are made from SS316L to boost hygiene and cleanability.
• Controls: vacuum control station with timed valves, dosing logic, and automatic filter stroke / regeneration to prevent filter blinding and sustain continuous operation.
• Conveying mode: Commonly conveyed in a dilute-phase due to being a low bulk density, non-abrasive powder (flour).

Why this matters: PTS removes manual handling, reduces dust exposure, prevents spillage, and gives a consistent feed to the inline sieve.

Vacuum Sivtek — inline vacuum sieving for fine powders

The Vacuum Sivtek is installed directly in the PTS line to screen material under negative pressure (vacuum). The brochure cites operating vacuums up to ~400 mmHg, providing a sealed sieving environment.

What it does, simply:

• Removes lumps, fibers, and oversize particles introduced during storage or transfer.
• Operates enclosed so no airborne dust escapes and screened flour is immediately re-conveyed.

Operational note: match sieve mesh to desired flour grade and let the vacuum control station manage dosing and filter cleaning cycles for uninterrupted throughput.

Re-transfer via PTS — keep the loop closed

After vacuum sieving, the PTS moves the screened material onward. Keeping material in a closed loop (PTS → Vacuum Sivtek → PTS) eliminates intermediate open hoppers and reduces contamination risk.

Practical benefit: fewer handling steps, lower cleaning demand, and predictable feed into mixing or the final screen.

Two routing choices — direct mix or final pressure screening

Option A — Direct to Mixing Tank

Use this for standard biscuit grades where upstream vacuum sieving meets quality requirements. It’s faster and uses fewer machines.

Option B — Via Sivtek Pressure Screen (final safety sieve)

For premium lines or extra assurance, route flour through the Sivtek Pressure Screen before mixing. This unit operates under positive air pressure and agitates particles inside a sealed chamber so fines pass through the mesh while oversize material is retained. Meshes are interchangeable (supports very fine meshes — up to 100 mesh or more, per brochure), and air pressure is adjustable to suit different flour characteristics.

Why the Pressure Screen: it’s a final defense against contaminants and oversized granules, protecting mixers and assuring batch uniformity.

Why Galaxy Sivtek

Choosing Galaxy Sivtek means more than buying equipment — it’s about partnering with a trusted ally that helps biscuit manufacturers turn material-handling concepts into dependable plant operations.

Advantages for biscuit manufacturers

1. Hygiene & food safety — Fully enclosed PTS → Vacuum Sivtek → Pressure Screen flows minimise exposure and reduce contamination risk at every transfer point, supporting HACCP and audit readiness.
2. Operational efficiency & time savings — Automated packing system transfer, timed portion dosing, and self-cleaning filter cycles, minimize manual handling, decrease the length of batch cycles, and eliminates housekeeping time. So we have a faster line and fewer hours of labor.
3. Flexibility — PTS modules can be arranged flexibly, and meshes can be interchanged with variable pressure settings to quickly modify compounds, recipes, and volume.
4. Consistent quality — Inline screening for biscuits production with multiple stages for uniformity in particle size will assure predictable dough rheology, hence minimizing rejects and aiding in baking performance.
5. Regulatory compliance — Food-grade construct, easy tool free and hygienic construction assists in meeting the demand of the cGMP/FDA/BRC and makes the cleaning/ inspection cycle easier to work on.

Conclusion

From the moment wheat flour leaves the silo, the path it takes determines the final biscuit’s success. Galaxy Sivtek’s innovative sieving and transfer solutions make sure that every single particle from the flour meets your manufacturing standards – safely, efficiently and hygienically. In an industry where consistency is king, these technologies are not just equipment, but a competitive advantage.

If you want to safeguard your biscuit production process and improve efficiency with a customized sieving solution, reach out to Galaxy Sivtek today. Our experts will analyze your needs and recommend the best-fit equipment for your operations.