1. Overview
In feed production, the quality of finished pellets depends heavily on precise grading—removing unqualified large particles, fine powder, and impurities to ensure uniform particle size. The Feed Pellet Rotary Grading Sieve is a core screening device engineered for this purpose, integrating circular, oval, and linear composite motion modes to achieve high-efficiency, high-precision separation.
Available in 4 models (SFJH80 to SFJH150) with customizable 2-3 layer sieves, it is widely used in feed processing plants for grading cooled/crushed pellets and cleaning raw materials. Its versatility also extends to grain, food, chemical, and sugar industries, making it a multi-scene screening solution.
2. Core Features
2.1 Composite Motion for Superior Screening Performance
The sieve integrates circular, oval, and linear motions—this unique combination maximizes material dispersion on the screen surface, avoiding particle accumulation and ensuring full contact with the sieve mesh. Screening efficiency reaches over 95%, and particle size accuracy is controlled within ±0.1mm, far exceeding ordinary linear sieves.
2.2 Stable & Low-Noise Operation
- Balanced Transmission: The screen boat adopts belt-driven design, reducing vibration amplitude by 40% compared to chain drives; the improved flexible support at the tail further minimizes vibration and noise (≤75dB(A)).
- Robust Base: Equipped with a strengthened engine base for stable operation even at high output; optional steel wire rope hanging structure (avoids rope abrasion) enables overhead installation, saving floor space.
2.3 Flexible & User-Friendly Design
- Multi-Layer Sieve Options: Standard 2-layer sieves (separate large particles, qualified pellets, and fine powder); 3-layer sieves available for more precise grading (e.g., 3 particle size ranges for different animal growth stages).
- Easy Sieve Replacement: Adopts integrated or detachable sieving frames—lightweight, high-rigidity, and good airtightness. Sieves can be replaced in 10-15 minutes without professional tools, adapting to quick product switching.
- Anti-Accumulation Outlet: Streamlined inner design of the discharge port prevents material buildup and cross-contamination, ensuring feed hygiene compliance.
3. Working Principle
The grading sieve realizes precise separation through a 3-step workflow, acting as a “quality checkpoint” in feed production:
- Material Feeding: Cooled or crushed feed pellets enter the sieve evenly through the feeding port.
- Multi-Layer Separation:
- Upper Sieve: Retains unqualified large particles (e.g., under-crushed pellets), which are discharged and sent back for re-crushing.
- Middle Layer (Qualified): Collects pellets of standard size (e.g., 2-4mm for chicks), which are conveyed to packaging.
- Lower Sieve: Filters out fine powder and small impurities, which are recycled for re-pelletizing.
- Continuous Discharge: The composite motion of the sieve ensures continuous material flow, avoiding blockages and maintaining stable output.
4. Application Scenarios
4.1 Feed Industry (Core Application)
- Pellet Grading: After crushing large pellets, separate qualified particles (e.g., 1-2mm for shrimp feed, 3-5mm for chicken feed) from oversize/undersize materials, improving finished product quality.
- Raw Material Cleaning: Remove stones, chaff, and fine dust from corn, soybean meal, and other raw materials before pelleting, protecting downstream equipment (pellet mills) from wear.
4.2 Other Industries
- Grain Industry: Grade wheat, rice, and corn by particle size for storage or deep processing.
- Food Industry: Screen flour, starch, and snack pellets to remove agglomerates and impurities.
- Chemical/Chemical Engineering: Separate granular chemical products (e.g., fertilizer granules) to ensure uniform particle size.
5. Technical Parameters
| Model No. | Dimensions (A×B×C, mm) | Sieving Area | Power | Output |
|---|---|---|---|---|
| SFJH80 | 2790×1180×1200 | 800×1600mm×2 | 1.5Kw | 3-8t/h |
| SFJH100 | 3270×1400×1250 | 1000×2140mm×2 | 2.2Kw | 6-12t/h |
| SFJH125 | 3700×1840×1500 | 1250×2500mm×2 | 3Kw | 8-15t/h |
| SFJH150 | 4200×2000×1800 | 1500×2800mm×2 | 3Kw | 10-20t/h |
Note: A=Overall length, B=Overall width, C=Overall height; Sieving area is calculated based on 2 standard layers (3-layer option available).
6. Selection Suggestions
- Small Feed Workshops (3-8t/h): Choose SFJH80—compact size, suitable for limited space, matches small pellet production lines.
- Medium-Scale Feed Plants (6-15t/h): Opt for SFJH100/SFJH125—balances capacity and cost, fits 5-10t/h pellet lines.
- Large Feed Factories (10-20t/h): Select SFJH150—large sieving area, supports 24/7 continuous production, adapts to industrial-grade lines.
- High-Precision Needs: Add 3-layer sieves and customize sieve mesh size (0.5-10mm optional) for specialized feed (e.g., aquatic fry feed).