Equipment
High-efficiency continuous vertical centrifugal dewatering machine for rapid surface moisture separation from plastic pellets, micropellets, and washed regrind.
Reference values for the model or models named above. The confirmed configuration, the capacity basis and the scope of supply are stated in the quotation and the drawings.
Overview
Separates water continuously from plastic pellets, micropellets, and washed flakes via high-speed vertical centrifugal action, reducing surface moisture to ≤ 0.05%–0.1%.
The Vertical Centrifugal Dryer (centrifugal dewatering machine / spin dryer) delivers continuous, high-efficiency mechanical dewatering for polymer pellets, micropellets, and washed plastic flakes directly downstream of water-cooling pelletizing systems or recycling wash lines. Operating on centrifugal acceleration generated by a high-speed rotating rotor equipped with multi-tiered angled lifter paddles, the slurry enters the bottom chamber where solid particles are driven upward along a precision cylindrical screen basket while water is forcibly separated through screen perforations.
Unlike thermal drying hoppers that consume substantial electrical heat and require prolonged residence times, the vertical centrifugal dryer utilizes pure kinetic energy to strip surface moisture down to ≤ 0.05%–0.1% on standard virgin/compound pellets in a continuous single-pass process lasting only seconds. The counter-current upward flow combined with top-mounted vapor exhaust fans prevents condensation back-dripping, delivering surface-dry pellets ready for immediate classification, storage, or direct packaging.
Key features
Each picture names one part of the machine and what it does for the material and the batch.
Dynamically balanced high-speed multi-stage rotor fitted with precision-angled lifting blades. Gently lifts pellets axially upward while applying high centrifugal force, separating water cleanly without fracturing brittle pellets or creating excess fines.
Segmented cylindrical screen basket fabricated from heavy-gauge stainless steel with smooth, non-blinding perforations. Quick-release hinged or clamp design allows complete screen removal and replacement in under 15 minutes.
Direct bottom tangential water flume and slurry inlet designed for smooth, low-turbulence entry. Rapidly drains separated process water through an oversized bottom drain outlet to prevent internal flooding and backpressure.
Full-height split access doors equipped with quick-action clamping latches and safety interlock limit switches. Provides instant 360° access for thorough washdown, screen inspection, and color changeover cleaning.
Heavy-duty stainless-steel tempered water reservoir engineered to continuously quench, cool, and slurry-convey freshly cut polymer pellets from the die face directly into the dewatering chamber. Maintains stable process water temperatures and surge-free closed-loop circulation for 24/7 continuous pelletizing lines.
Dedicated horizontal infeed screw conveyor that continuously forces high-moisture plastic flakes directly into the bottom of the drying rotor chamber to initiate dewatering. Engineered strictly for washed recycling flakes and irregular regrind—not applicable to post-pelletizing granules or micropellets.
Material and process
Read the conditions together: a machine is selected for the material and the output, not from its name alone.
Optimized for rapid mechanical surface dewatering of rigid thermoplastic pellets, masterbatch granules, recycled regrind flakes, and micro-pellets across standard engineering and commodity resins, including PP, PE, HDPE, LDPE, ABS, PS, PC, PET, PA, and rigid PVC.
Widely installed downstream of strand water baths, water-ring die-face pelletizers, underwater pelletizing water loops, and PET bottle wash lines. Processes solids throughputs from 300 kg/h to 6,000 kg/h, continuously stripping incoming surface water down to ≤ 0.05%–0.1% residual moisture without thermal degradation.
High-speed mechanical surface dewatering unit; key operating boundaries include:
Accepts continuous water-pellet or water-flake slurries directly from strand water troughs, water-ring pelletizer chutes, underwater pelletizing water loops, or plastic washing lines. Solids include rigid thermoplastic pellets, micropellets (≥ 1.0 mm), and rigid flake regrind.
Feed slurry must be free of heavy metallic tramp pieces, oversized plastic agglomerates, and long un-pelletized strands that could jam between rotor paddles and the screen basket. Slurry temperature should remain below the polymer’s Vicat softening point to prevent smearing against the screen.
Delivers continuous, surface-dry plastic pellets (residual moisture typically ≤ 0.05%–0.1% on standard PP/PE/ABS pellets) discharging continuously from the top tangential outlet chute.
Pellets retain their original shape with minimal attrition, zero thermal degradation, and low fines generation, ready for direct feeding into vibrating classification screens, pneumatic transfer silos, or bagging hoppers.
Throughput
Read a figure together with the basis below it: the same machine reaches different numbers on different materials.
300–1000 kg/h
Continuous drying throughput ratings (ranging from 300 kg/h up to 6,000 kg/h of dry pellets) are based on standard rigid thermoplastic pellets (e.g., PP, PE, ABS, PET, bulk density ~0.60 kg/L, diameter 2.5–3.5 mm) discharging from strand or underwater cooling troughs with incoming water-to-pellet slurry ratios between 10:1 and 25:1 by volume.
Throughput and final residual moisture are influenced by pellet geometry, hardness, water temperature, and screen perforation size. Irregular regrind flakes and micro-pellets require reduced feed rates and specialized screen sizing (0.8–1.2 mm slots) to avoid screen blinding and maintain moisture targets below 0.1%.
Models
The figures are the reference values entered for each model. The model for your line is confirmed against your material and output before it is quoted.
Scroll the table sideways to read every column →
| Model | Capacity range | Rated power | Dimensions | Rotor size | Feeding Motor |
|---|---|---|---|---|---|
| NC-LT350 | 0.2-0.3 Ton/Hour | 7.5 kW | L3020×W960×H2350mm | Φ350×1545mm | 1.5Kw |
| NC-LT380 | 0.3-0.5 Ton/Hour | 7.5 kW | L3100×W1120×H2350mm | Φ380×1545mm | 1.5Kw |
| NC-LT420 | 0.5-0.7 Ton/Hour | 15 kW | L3240×W1350×H2440mm | Φ420×1615mm | 1.5Kw |
| NC-LT460 | 0.7-0.95 Ton/Hour | 15 kW | L3340×W1460×H2440mm | Φ460×1615mm | 1.5Kw |
Scope of supply
The quotation states the scope for the confirmed configuration; the groups below describe how a supply is normally split.
Installation planning
These are the connections the machine and the line around it have to agree on before the layout is fixed.
Mechanical: Bottom flanged slurry inlet port (DN100–DN200) or open gravity chute; top dry pellet discharge spout (DN150–DN250) compatible with pneumatic pick-up adapters or vibrating screens; bottom process water drain flange (DN200–DN350) discharging by gravity into the water tank.
Electrical & Automation: Three-phase main power supply to the drive motor / control panel. Control panel interface provides interlock terminals with upstream pelletizer cutters and slurry water pumps, emergency stop circuit, and drive motor thermal protection trips.
The buyer provides a reinforced level concrete slab engineered for dynamic rotary equipment, free of structural resonance. Buyer arranges main power cabling to the motor terminal box or local control panel, process slurry supply piping, and a gravity drain trench or water flume connection capable of handling maximum recirculating water flows without back-flooding the dryer sump.
Spare parts
The parts that wear in normal service, and the spares worth keeping on site. How often a part is replaced depends on the material and the duty the machine runs, so the basis is confirmed for each machine.
Inspect quarterly for perforation wear, cracking, or elongation; replace when hole enlargement allows pellet loss into the water drain or when severe abrasive scoring occurs.
Primary dewatering filtration screen. Cylindrical segmented design. Keep one complete spare set on site matching your pellet diameter perforation spec. Provide machine serial number and perforation diameter when reordering.
Replace the whole rotor shaft when blade edge wear reaches 3–5 mm, when pellets start accumulating in the lower chamber, or after about 3,000 tonnes of material. Inspect every six months.
Angled lifting blades are fixed to the shaft: they cannot be replaced separately, only as a complete balanced shaft assembly. Lifting pellets along the screen wears them continuously under friction and pellet impact. Order by machine serial number.
Check belt tension monthly; replace the full matched set if belts exhibit glazing, fraying, or slip under starting torque.
Matched V-belt set transmitting power from the drive motor to the vertical rotor shaft.
Blades, screens and other normal consumables are outside the standard warranty. How a spare part is identified and ordered is set out under Warranty & Spare Parts.
Selection
Work through what you already know. The rest is settled in the conversation, not before the first message.
Follow these engineering guidelines when selecting and sizing a vertical centrifugal dryer:
Request a Quote A model name, a material or a drawing is enough to start.
Photos and videos
Tell us the material, the process and what you need to achieve. Technical details can be completed later together with our sales team.
