1. Overview
The Vibrating Feed Pellet Grading Sieve is a specialized screening device engineered to separate qualified feed or wood pellets from unqualified large particles and fine powder. Based on the probability screening principle, it achieves precise grading by matching appropriate screen mesh sizes and sieve surface inclination.
With core advantages of dust-free operation, low noise, and high screening efficiency, this sieve is a staple in feed pellet plants and wood pellet facilities. It solves the critical problem of “powder contamination in finished products”—ensuring uniform pellet size, improving product quality, and boosting economic benefits for producers.
2. Why Use a Vibrating Grading Sieve in Feed Production?
Directly packaging feed pellets without screening leads to mixed fine powder, which degrades product quality and reduces market competitiveness. The vibrating grading sieve addresses this pain point and delivers three key values:
2.1 Improve Finished Product Quality
It effectively separates qualified pellets from oversize particles (under-crushed) and fine powder. The resulting products have uniform particle size, no impurities, and meet commercial feed quality standards—enhancing customer trust.
2.2 Reduce Cost & Recycle Materials
Unqualified large particles are sent back for re-crushing, and fine powder is recycled for re-pelletizing—reducing raw material waste by 8%-12% and shortening the return on investment cycle.
2.3 Protect Downstream Equipment
By removing impurities and agglomerates before packaging, it avoids blockages in automatic packing machines, extending the service life of downstream equipment.
3. Core Features & Benefits
3.1 Simple Structure & Easy Operation
- Adopts a streamlined design with fewer moving parts, ensuring reliable screening performance and low failure rates.
- Operation is straightforward: only need to adjust amplitude and feed rate; routine maintenance (screen replacement, cleaning) can be completed in 10 minutes without professional tools.
3.2 Efficient & Energy-Saving Performance
- Powered by high-performance vibrating motors (0.4Kw for both models), it consumes 30% less energy than traditional sieves while maintaining high output (4-15t/h).
- Screening efficiency reaches over 90%, ensuring continuous matching with small-to-medium pellet production lines.
3.3 Low-Noise & Eco-Friendly Design
- Equipped with fully sealed sieve chambers and damping springs, it achieves low noise (≤70dB(A)) and no dust leakage—meeting environmental protection requirements for feed factories.
- Food-grade stainless steel sieves ensure feed hygiene, avoiding cross-contamination during screening.
3.4 Anti-Blockage & Cost-Saving Innovation
- Larger Screen Meshes: Compared to ordinary sieving machines, its enlarged screen meshes significantly reduce blockage caused by sticky pellets, optimizing the screening process and reducing downtime.
- Shorter Screen Surface: Under the premise of ensuring grading effect, the shortened screen surface reduces material consumption and production costs by 20%.
- Flexible Separation: Combines large screen meshes with 20° sieve surface inclination to achieve small separation sizes (adjustable by mesh replacement), adapting to diverse pellet specifications.
4. Operating Instructions
Proper operation ensures stable performance and extends equipment service life:
- Pre-Operation Adjustment: Set the amplitude according to pellet size and output; ensure the motor rotation direction is consistent with the pellet flow direction.
- Pre-Operation Inspection: Check that damping springs are intact and motor plugs are securely connected to avoid vibration abnormalities.
- Start-Up Sequence: Start the motor under no-load conditions; begin feeding only after the machine runs stably.
- Feeding Requirement: Feed materials uniformly and steadily within the specified range to prevent uneven material layers from affecting screening efficiency.
- Shutdown Sequence: Stop feeding first, then turn off the motor after all materials are discharged.
- Routine Maintenance: Clean the sieve surface and chamber regularly; inspect screen wear and replace damaged sieves in time.
5. Selection & Optimization Tips
5.1 Choose the Right Screen Mesh Shape
- Rectangle Meshes: Suitable for cylindrical pellets (e.g., standard chicken feed pellets) — ensure smooth passage without shape damage.
- Round Meshes: Ideal for irregular pellets with similar volume (e.g., wood pellets, shrimp feed) — improve size classification accuracy.
5.2 Solve Feeding Concentration Issues
If using a bucket elevator for direct feeding, pellets tend to accumulate in the middle of the sieve, reducing screen utilization and grading effect. Install a buffer hopper with flow deflectors at the feeding port to distribute materials evenly across the sieve surface.
6. Technical Parameters
| Model No. | Sieving Area | Power | Vibration Frequency | Output | Sieve Surface Inclination |
|---|---|---|---|---|---|
| SFJZ80 | 800×1800mm² | 0.4Kw | 960Hz | 4-12t/h | 20° |
| SFJZ100 | 1000×1800mm² | 0.4Kw | 960Hz | 6-15t/h | 20° |