Sink-Float Separation Tank
The cornerstone of any high-performance PET plastic washing line. This sink-float tank uses water density to separate PET flakes from lighter PP/PE contaminants and supports high final purity.
Achieve Premium Quality, Automatically
The sink-float tank is built as the central separation stage in PET bottle washing lines, delivering stable output purity and supporting higher final product value.
High Purity Separation
Water density keeps PET flakes (density above 1.2 g/cm3) sinking while PP/PE caps and labels float, reducing cross-contamination.
Automated Continuous Workflow
Rotating drums and screw conveyors separate, collect, and transport material continuously, reducing manual handling.
Durable Construction
Type 304 stainless steel interior with a carbon steel frame supports long-term operation in wet and abrasive environments.
How Density Separation Works
Material Infeed
Mixed crushed flakes (PET, PP, PE) enter the water-filled tank.
Density Separation
Heavier PET sinks while lighter PP/PE contamination remains on the surface.
Automated Discharge
Top drums skim floating material and bottom screw conveyors discharge cleaned PET flakes.
Technical Specifications
| Interior Width | 1500 mm - 2000 mm |
|---|---|
| Total Length | 4 meters - 6 meters (customizable) |
| Interior Material | Type 304 Stainless Steel |
| Exterior Frame | Heavy-duty Carbon Steel |
| Screw Conveyor Motors | 5.5 kW + 3.7 kW |
| Rotating Drum Motors | 2.2 kW + 0.37 kW |
| Control System | Independent control panel or PLC integration |
| Warranty | 1-Year Limited Warranty |
Frequently Asked Questions
What is the main advantage of this sink-float tank?
The main advantage is high PET flake purity. Density-based separation removes PP and PE contamination and supports higher-value downstream output, including stricter recycling targets.
What materials can this tank effectively separate?
It is mainly used in PET bottle recycling to separate PET from lighter PP/PE cap and label materials. It can also separate other mixed rigid plastics when density differences are clear.
What processing capacities do you offer?
Standard lengths are typically 4 m and 6 m. Custom dimensions and motor configurations are available based on throughput and layout requirements.
Enhance Your PET Recycling Process Today
Contact us for pricing, lead time, and customization options, and to confirm configuration against your contamination profile and target output purity.
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