Sugar and sweeteners are typically screened at 14 to 200 mesh (1,400 to 75 microns) depending on the application. Coarse granulated sugar uses 14 to 40 mesh for grading and safety screening, while powdered sugar and fine sweeteners require 60 to 200 mesh for de-lumping and particle size control.
Sugar screening presents unique challenges because sugar is hygroscopic, abrasive in crystalline form, and prone to clumping when exposed to humidity. Choosing the right mesh size, screen material, and equipment configuration determines whether you get clean separation or constant blinding and downtime. ScreenerKing has supplied screens to sugar refineries, confectionery plants, and beverage manufacturers for over 30 years. This guide covers every common sugar and sweetener application.
Recommended Mesh Sizes by Application
| Material / Application | Mesh Size | Micron Size | Purpose |
|---|---|---|---|
| Raw sugar — scalping | 6–10 mesh | 3,350–2,000 µm | Remove large clumps and foreign material |
| Granulated sugar — safety screening | 14–20 mesh | 1,400–841 µm | Remove foreign material, oversize crystals |
| Granulated sugar — grading | 30–40 mesh | 595–400 µm | Classify into fine and coarse fractions |
| Caster sugar (superfine) | 40–60 mesh | 400–250 µm | Ensure uniform fine crystal size |
| Powdered sugar (10X confectioners) | 100–200 mesh | 150–75 µm | De-lumping, remove agglomerates |
| Brown sugar | 8–14 mesh | 2,380–1,400 µm | Break up clumps, remove oversize |
| Turbinado / demerara sugar | 10–16 mesh | 2,000–1,190 µm | Grade coarse crystals, remove fines |
| Stevia / erythritol powder | 40–80 mesh | 400–180 µm | Safety screening and de-lumping |
| Sucralose | 60–100 mesh | 250–150 µm | Particle size classification |
| Dextrose / glucose powder | 30–60 mesh | 595–250 µm | Safety screening, remove agglomerates |
Factors That Affect Mesh Selection for Sugar
- Humidity and moisture: Sugar is highly hygroscopic. Ambient humidity above 60% causes clumping and screen blinding, especially on fine mesh below 60 mesh. Control the environment or add deblinding systems such as bounce balls or ultrasonic kits.
- Crystal hardness and abrasion: Crystalline sugar is abrasive and wears screens faster than soft powders. Expect shorter screen life on coarse sugar grading applications compared to flour or starch screening.
- Product specification: Retail granulated sugar requires tighter particle size distribution than industrial sugar used for dissolving in beverages. Tighter specs require more precise mesh selection and potentially multi-deck screening.
- Throughput: Sugar is dense (approximately 50 lb/ft3 for granulated). Higher throughput requires larger screener diameter. A 48-inch or 60-inch unit is common for refinery-scale sugar grading.
- Static charge: Fine sugar and powdered sweeteners can develop electrostatic charge, causing particles to cling to the screen. Grounding the screener and using stainless steel mesh helps reduce static-related blinding.
Screen Material Recommendations
304 stainless steel is the standard screen material for sugar and sweetener applications. It is FDA-compliant, corrosion-resistant, and handles the abrasion of crystalline sugar well.
316 stainless steel should be used when processing sugar solutions, liquid sweeteners, or when the facility uses aggressive washdown chemicals containing chlorides. 316 SS provides better resistance to pitting corrosion in wet or acidic environments.
T-430 stainless steel may be used when magnetic detection is part of the food safety program and a magnetic-grade screen is required downstream of a metal detector. However, 304 SS remains the primary choice for most sugar plants.
ScreenerKing replacement screens in 304 SS and 316 SS are available for all standard sizes from 18 to 60 inches, compatible with Sweco, Kason, Midwestern Industries, Cleveland Vibratory, and Russell Finex separators.
Equipment Recommendations
- Confectionery and small batch (under 1,000 lb/hr): ScreenerKing SiftPro 18" or 24" — ideal for powdered sugar de-lumping and specialty sweetener screening.
- Mid-volume food plants (1,000–5,000 lb/hr): ScreenerKing SiftPro 30" — handles granulated sugar grading and safety screening.
- Industrial sugar processing (5,000–15,000 lb/hr): ScreenerKing SiftPro 48 (48") — refinery-grade throughput for granulated sugar classification.
- High-volume refinery (15,000+ lb/hr): ScreenerKing SiftPro 60 — maximum capacity for raw sugar scalping and finished product grading.
Frequently Asked Questions
What mesh size is used for granulated sugar?
Granulated sugar is typically screened at 20 to 40 mesh (841 to 400 microns). Safety screening to remove foreign material and clumps uses 14 to 20 mesh. Grading into fine and coarse fractions uses 30 to 40 mesh. The exact mesh depends on the sugar specification and end use.
Why does powdered sugar blind my screens?
Powdered sugar is hygroscopic and very fine. It absorbs moisture from the air, causing particles to stick together and clog mesh openings. Control humidity in the screening area, use bounce ball or ultrasonic deblinding systems, and avoid letting sugar sit on a stopped screen. Properly tensioned ScreenerKing screens also help reduce blinding.
Can I use the same screen for sugar and flour?
You can use the same screener unit but should keep dedicated screens for each product to prevent cross-contamination. Optimal mesh sizes also differ between sugar and flour. ScreenerKing replacement screens are affordable enough to maintain separate screens for each product and swap them in minutes.
