How to choose between vibratory, gyratory, centrifugal and in-line sifters and rectangular screens for powders and granules.
Sifting and screening protect product quality: they remove oversize particles, lumps and foreign bodies, and separate products into size fractions. In food, chemical, pharmaceutical, ceramics and recycling plants, the right separator improves yield and reduces complaints. The wrong one blinds, wears out screens or becomes a bottleneck.
The task determines the machine type, the number of decks and the mesh sizes.
| Type | Strengths | Typical use |
|---|---|---|
| Circular vibratory sifter | Versatile, compact, 1 to several decks | Check screening and grading of powders and granules |
| Gyratory sifter | Gentle motion, high accuracy for fine separations | Precise grading of fragile or fine products |
| Centrifugal sifter | High capacity, low headroom, breaks soft agglomerates | Flour, sugar, powders before packing |
| In-line pneumatic sifter | Installs directly in pneumatic conveying lines | Check screening without breaking the conveying line |
| Bag dump station with sifter | Combines manual bag tipping with screening | Minor ingredient intake |
| Rectangular screens | Large screening area, high throughput | Granules, minerals, plastics, large flows |
Laboratory or on-site tests with your material are the best way to size a separator for a demanding application.
Fine and sticky powders can block mesh openings. Common solutions are ball or slider deck cleaners under the mesh, ultrasonic screen deblinding, and choosing a separator type that suits the material. Our range includes ultrasonic separators for very fine powders.
For food and pharmaceutical use, look for stainless steel contact parts, quick-release clamps, food-grade gaskets and documentation of food-contact materials. For pharmaceutical applications, dedicated designs such as the PharmaSep range simplify cleaning and validation. Where the product is a combustible dust, check the ATEX zone and the equipment category.
Sifters remove oversize contaminants but not fine metal particles that pass through the mesh. Install magnetic separators before or after the sifter for complete foreign-body control.
Browse our screeners and sifters, circular sifters and gyratory sifters, or send us your product data: material, throughput, particle size distribution, required cut points and the available space.
Check screening removes oversize particles and foreign bodies from a product that should already be in specification. Grading separates a product into several size fractions.
Ball or slider deck cleaners, ultrasonic deblinding systems and choosing the right separator type for the material all reduce blinding with fine or sticky powders.
Centrifugal sifters are often used for flour, sugar and similar powders before packing because they combine high capacity with low headroom. The right choice depends on throughput and space.
Circular SiftersThe Classic sifter stands out for its quality, short lead time and performance to SWECO standards. Available in 800, 1,200 and 1,500 mm diameters, it is known for a simplicity and robustness…
Gyratory SiftersThe SWECO Atlas gyratory sifter is the top of the SWECO range, combining very high capacity with simple operation. Its uniform horizontal gyratory motion across the screen minimises preventive maintenance and gives…
Other SeparatorsA unique combination of features makes the SWECO centrifugal sifter the benchmark in its class. SWECO's exclusive optional pre-screen lets more material be sifted and reduces fines in the oversize, increasing productivity…
Circular SiftersThe SWECO in-line pneumatic sifter screens free-flowing dry materials. It separates fine particles from coarse ones and removes foreign material, operating only when materials are conveyed pneumatically. An air bypass system keeps…
Circular SiftersThe high-quality containment system of the SWECO bag dump sifter effectively reduces the dust released into the workplace while feeding material from bags into a SWECO separator. The dust-control system is integrated…
Rectangular ScreensThe efficient conveying action of the circular motion comes from a two-bearing vibratory system running at 1,000 to 2,200 rpm and producing up to 3.5 G. It can be inclined for screening…
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