Water Ring Pelletizer: The Cure for Strand Breakage
For PP and PE film recyclers, strand breakage causes downtime and unstable pellet quality. Our water ring die-face cutter removes the strand stage entirely and cuts molten plastic directly at the die head for more continuous operation.
- Designed for recycled PP and PE film with varying moisture and melt flow conditions.
- Produces uniform, round pellets without manual restringing and water-bath strand handling.
- Available in practical capacities from 160 kg/h to 1200 kg/h depending on model.
Key Advantages of Water Ring Pelletizing
Zero Strand Breakage
Unlike strand pelletizers, the die-face system has no strands to break and can keep running under fluctuating MFI and moisture conditions.
Premium Pellet Aesthetics
Produces round, uniform lentil-shaped pellets that flow better and look more consistent in the finished product stream.
Fully Automated Operation
Eliminates the need for manual restringing and reduces labor around the water bath area.
Higher Moisture Tolerance
The water ring system can cool and convey pellets more reliably even when drying is not perfect.
Compact and Efficient
By removing the long water bath cooling tank, the system saves factory floor space.
Consistent Throughput
The integrated cutter compactor and die-face cutter work together to maintain more stable production.
Water Ring Die-Face Cutting Working Principle
1. Feeding
Material is fed via a belt conveyor into the compactor. Feeding speed is automatically adjusted and an optional metal detector can be integrated.
2. Shredding and Compacting
Rotary blades cut and heat the material through friction, shrinking and densifying it before it is fed stably into the extruder screw.
3. Plasticizing and Degassing
A specialized single-screw extruder gently melts the material. A double-zone vacuum system removes inks, moisture, and other volatiles.
4. Water Ring Pelletizing
Molten plastic is cut immediately at the die head and flung into the cooling water ring, avoiding strand handling altogether.
Water Ring Pelletizer Applications & Polymers
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Flexible Packaging
Suitable for LDPE and LLDPE industrial films, shopping bags, and shrink wraps.
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PP Woven Bags
Handles raffia, cement bags, and FIBC material with strong and consistent pellet output.
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Multi-Layer Films
Processes complex films including printed or laminated BOPP material after preparation.
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Post-Consumer Waste
Works with washed agricultural film and post-consumer plastic scraps requiring stable pelletizing.
Water Ring Pelletizing Line Specifications
| Model | Screw Dia. (mm) | L/D Ratio | Main Motor (KW) | Throughput (kg/h) |
|---|---|---|---|---|
| RM80 | 80 | 36:1 | 45/55 | 160-220 |
| RM100 | 100 | 36:1 | 90/110 | 300-380 |
| RM120 | 120 | 36:1 | 132 | 450-480 |
| RM140 | 140 | 36:1 | 160/185 | 500-650 |
| RM160 | 160 | 34:1 | 220/250 | 800-1000 |
| RM180 | 180 | 34:1 | 315 | 1000-1200 |
Water Ring Pelletizer in Action: Video
Complete Washing & Pelletizing Line
This machine is one stage of a full recycling line. A typical wet line runs in this sequence, and the equipment below covers each stage:
- Friction Screw Washer — scrubs off oil, labels, and surface dirt before separation.
- Sink-Float Separation Tank — separates plastics by density, floating light polyolefins off the heavier resins.
- Centrifugal Dryer — spins off free surface water mechanically after washing.
- Thermal Dryer — hot-air drying to below 1% moisture before pelletizing.
- Rigid PP/HDPE Flake Pelletizer — pelletizes clean rigid HDPE and PP flake into uniform pellets.
- Single-Screw Pelletizing Line — water-ring or strand single-screw pelletizing at production throughput.
See the full rigid plastic washing line, or our guide on plastic recycling washing line cost.
Frequently Asked Questions
It eliminates strand breakage by cutting molten plastic at the die face instead of pulling cooled strands through a water bath. This is especially helpful for recycled PP/PE film with varying moisture and MFI.
It is mainly used for recycled PP and PE film, woven bags, raffia, and similar soft polyolefin scrap streams that are hard to run stably on strand pelletizers.
Die-face cutting typically produces uniform, near-spherical pellets with better flow and packing consistency than irregular strand-cut granules.
Standard models cover about 160–1,200 kg/h depending on screw diameter, motor power, and material condition. Exact capacity is confirmed after reviewing your feedstock.
Yes. It is commonly installed after washing and drying. Stable feeding and controlled residual moisture still matter for pellet quality and throughput.
Yes. Support includes a one-year limited warranty, remote technical assistance, spare parts supply, and optional installation guidance or on-site commissioning.
Warranty & Global Installation Support
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1-Year Limited Warranty
All our recycling machinery comes with a limited warranty for added peace of mind.
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Expert Installation Support
We offer installation packages where our engineers can guide setup and customize the line to match customer requirements.
Get a Water Ring Pelletizer Quote
Ready to eliminate strand breakage and upgrade to professional-grade pellets? Contact us for a quotation on our water ring system.
