Feed material enters axially through one end of the sealed cylindrical housing; the rotating paddle or blade rotor (500–3,000 RPM) creates centrifugal force that propels particles radially outward against the cylindrical screen. On-specification particles are flung through the screen aperture into the outer annular collection zone and discharged at the sieved outlet. Oversize lumps, agglomerates, and tramp are advanced axially by the helical paddle pitch to the reject outlet at the far end. Blade tip speed (3–15 m/s) is the primary variable higher speed increases throughput and improves de-agglomeration of lumps; lower speed reduces fines generation.
Challenges
Screen Blinding at High Moisture or Sticky Feed
Moist or tacky product coats centrifugal screen apertures throughput rapidly collapses.
Fines Generation from Paddle Blade Tip-to-Screen Contact
At maximum speed, paddle tips can contact fragile granules against screen generates unacceptable fines.
Limited Separation Sharpness (Cut-Point Not as Sharp as Vibro Sifter)
High centrifugal energy reduces precision of cut point suitable for de-lumping, not precision classification.
Screen Replacement Requires Housing Disassembly
Cylindrical screen sits inside sealed housing screen change requires full housing removal and reassembly.
Heat Generation at High Rotor Speed (>1,500 RPM)
High-speed paddle rotation heats product via friction thermolabile powders can degrade above 35°C.
Solutions
- Scraper Blades with PTFE Coating on Paddle Tip: PTFE-coated scraper tips prevent sticky product adhesion to screen sustained throughput on moist feed.
- Variable Tip Clearance Adjustment (0.5–3 mm, Micrometre-Set): Adjustable paddle-to-screen clearance matched to product fragility fragile granules use 2–3 mm clearance.
- Dual-Zone Screen (Coarse Inlet Zone + Fine Discharge Zone): Coarser aperture at feed inlet breaks lumps first; finer aperture at discharge ensures precise cut two-zone screen.
- Quick-Release Screen Cassette (Tool-Free, <5 min Replacement): Screen mounted on axial cassette slides out from feed end without housing disassembly in <5 minutes.
- Jacketed Housing with Chilled Water (15–25°C) on High-Speed Models: Water jacket surrounds centrifugal housing limits product temperature rise to <5°C at maximum rotor speed.
Applications
- Food & Beverage: Flour, icing sugar, starch de-agglomeration, cocoa powder sieving high throughput compact installation.
- Pharmaceutical: Bulk excipient de-lumping, API powder conditioning, tablet blend oversize removal before press feed.
- Chemical: Pigment de-agglomeration, polymer powder sieving, specialty powder inline quality control at high rate.
- Nutraceuticals: Protein powder de-lumping, supplement powder inline QC before packaging high throughput continuous.
- Cosmetics: Face powder and mineral pigment de-agglomeration, fine powder inline conditioning before filling.
Models & Capacities
| Type 3Â Centrifugal Sifter / Screener: Models & Capacities | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | Scale | Throughput [kg/h] | Screen Aperture [µm–mm] | Rotor Ø [mm] | Rotor Speed [RPM] | Tip Speed [m/s] | Motor [kW] | L × W × H [mm] | Weight [kg] |
| CF-LAB | Lab | 50–300 | 150 µm–6 mm | Ø100 | 500–3,000 VFD | 3–16 | 0.37–0.75 | 450×300×350 | 28 |
| CF-PIL | Pilot | 150–800 | 150 µm–6 mm | Ø150 | 500–3,000 VFD | 4–24 | 0.55–1.1 | 600×400×450 | 55 |
| CF-500 | Production | 300–2,000 | 200 µm–6 mm | Ø200 | 500–3,000 VFD | 5–31 | 1.1–2.2 | 800×550×600 | 110 |
| CF-1000 | Production | 600–4,000 | 200 µm–6 mm | Ø250 | 500–2,500 VFD | 7–33 | 2.2–4.0 | 1,000×650×750 | 185 |
| CF-2000 | Production | 1,000–6,000 | 250 µm–6 mm | Ø300 | 500–2,500 VFD | 8–39 | 4.0–7.5 | 1,200×800×900 | 310 |
| CF-4000 | Production | 2,000–10,000 | 300 µm–6 mm | Ø400 | 400–2,000 VFD | 8–42 | 7.5–11 | 1,600×1,000×1,100 | 520 |
| CF-6000 | Large Prod | 3,500–15,000 | 400 µm–6 mm | Ø500 | 300–1,500 VFD | 8–39 | 11–18.5 | 2,000×1,250×1,350 | 850 |
| CF-8000 | Large Prod | 5,000–20,000 | 500 µm–6 mm | Ø600 | 200–1,200 VFD | 6–38 | 15–22 | 2,400×1,450×1,600 | 1,250 |