Centrifugal Sifters

High-Throughput, Efficient Product Screening

The centrifugal sifters offered by Rospen are designed to screen at high capacities, delivering good separation and conditioning of powders, granules, and other similar bulk materials. Our machines ensure consistency, high quality, and optimal performance in your processes. It is essentially a rotating sieve for use in gravity, vacuum or blowing applications with a variety of screen sizes, ATEX and hygienic versions available.

Summary

Screen Size: 100 micron – 30 mm
High sifting rates even with small particle size
Continuous oversized discharge
Capacity from 50 – 80,000kg/hr
ATEX Zone 20/ Zone 22
Optional materials of construction: Mild Steel, Stainless Steel 304, 316, and, upon request, polished finishes to user specifications.

How It Works

The high-output machines are efficient and effective since they enable a continuous supply of material to enter the sifting area via a feed screw. In this case, the product is thrown onto the sifting screen through the centrifugal action of the sifter paddles, ensuring even product distribution and effective sifting.

The oversized end is fitted with an adjustable baffle, which is designed so that any lumps or product clumps break down prior to entering the oversized bin.

Key Advantages

Precision Control: Accurate, consistent sieving for quality-controlled output
Material Conditioning: Breaks up agglomerates and homogenises blends
Crushes Friable Lumps: Ensures a uniform product by reducing soft agglomerates
Continuous Operation: Maintains flow and minimises downtime
Flexible Integration: Can be vacuum or pressure rated for seamless use with pneumatic conveying systems

Versatility & Applications

Our centrifugal sifters excel at:

Controlled sieving for quality assurance
Product classification by particle size
Bulk material conditioning to maintain process efficiency

With robust, high-speed operations, Rospen sifters will have a continuous flow of material, delivering rapid and even distribution across the sifting screen for optimal throughput.

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Features & Options

Screen: 360-degree rotating screen
High Output Rates: Capacities up to 80 tonnes per hour and more on special request
Continuous Oversize Discharge: Streamlines handling and processing
Material Choices: Constructed to suit your needs in mild steel, stainless steel 304, or 316, with polished finishes available. Basket assembly available in 430 metal detectable stainless steel.
Tailored Configurations: Modular designs and sizing to fit your application
Sanitary Design: Easy access for cleaning and maintenance
Explosion Protection: For applications where explosive dusts are processed, Rospen offers an ATEX-rated centrifugal Sifter (Internal Zoning 20 (on request)/21 (as standard), External Zoning 22).

Model Comparison Table

Model	CFS-600	CFS-750	CFS-1000
Materials of Construction
304 Stainless Steel	✓	✓	✓
316 Stainless Steel	✓	✓	✓
Surface Finish Options
Bead Blast (Inside and Outside)	✓	✓	✓
Polished (180/240 Grit – (Inside/Outside)	✓	✓	✓
Features
Cantilevered Shaft	✓	✓	✓
Quick Release Shaft	✓	✓	✓
Bolted Paddle Assembly	✓	✓	✓
Fully Welded Paddle Assembly	✓	✓	✓
Air Purge Seals	✓	✓	✓
Bolted and Hinged End Door	✓	✓	✓
Bolted and Hinged Side Door	✓	✓	✓
Restricted Oversize Outlet	✓	✓	✓
ATEX Options
Safe Area Internal and External	✓	✓	✓
ATEX 20 Internal/ATEX 22 External	✓	✓	✓
Design Type
Pressure Design (+1 Barg/- 0.5 Barg)	✓	✓	X
Gravity Design	✓	✓	✓

Average Capacity Range and Mesh Sizes

Typical throughput based on a CFS600 sifter.

Products	Capacity Range	Typical Mesh Size
Flour	130 – 80000 kg/hr	400 – 6000 μ
Starch	300 – 20000 kg/hr	100 – 2000 μ
Spices	500 – 8000 kg/hr	600 – 3000 μ
Milk Powder	400 – 20000 kg/hr	100 – 3800 μ
Cosmetics	500 – 8000 kg/hr	630 – 1000 μ
PVC	130 – 8000 kg/hr	125 – 3000 μ
Detergent / Soap Powder	1100 – 2700 kg/hr	500 – 1700 μ
Phosphates	1200 – 7000 kg/hr	125 – 4000 μ
Gypsum	1000 – 20000 kg/hr	200 – 500 μ
Sugar	100 – 9000 kg/hr	215 – 4000 μ