PVC Granulating Pelletizing Line

The SUHUI PVC granulating pelletizing line is a specialized system designed to process rigid and flexible polyvinyl chloride (PVC) waste into high-quality recycled PVC pellets. It handles a wide range of PVC scrap including industrial offcuts, construction waste, cable insulation, window profile scraps, and post-consumer PVC products — transforming them into reusable material for manufacturing pipes, cables, fittings, and profiles.

PVC processing presents unique challenges due to the material’s thermal sensitivity — overheating causes degradation and releases corrosive hydrogen chloride gas. The SUHUI PVC pelletizing line addresses this with precision multi-zone temperature control, corrosion-resistant extruder components, integrated fume extraction, and in-line additive dosing systems for stabilizers and lubricants that protect material quality throughout the extrusion process.

Supporting both rigid uPVC and flexible plasticized PVC (soft PVC) without equipment reconfiguration, this PVC recycling machine configuration is ideal for PVC recyclers, pipe manufacturers, and cable compounders pursuing circular economy and sustainable production goals. The same soft PVC pelletizing capability covers cable insulation, hoses, and flexible sheet scrap.

One line supports both rigid uPVC scrap such as pipes and window profiles and flexible PVC scrap such as cable insulation and soft sheets.

Key Features of SUHUI PVC Granulating Pelletizing Line

• Precision Multi-Zone Temperature Control: Independent heating and cooling zones along the barrel and die prevent PVC thermal degradation, maintaining melt quality throughout the extrusion process.
• Rigid & Flexible PVC Compatibility: Handles both rigid uPVC and flexible PVC (with plasticizers) without screw or die reconfiguration, maximizing line versatility.
• Corrosion-Resistant Extruder Components: Hardened, corrosion-resistant barrel, screw, and die materials withstand acidic byproducts generated during PVC processing.
• Twin-Screw Extruder: Conical or parallel twin-screw design ensures thorough mixing, homogenization, and degassing of PVC compound with additives.
• In-Line Additive Integration: Gravimetric dosing systems accurately add stabilizers, lubricants, plasticizers, and colorants directly into the extrusion process.
• Fume Extraction System: Activated carbon filters and forced ventilation capture and neutralize corrosive gas emissions, ensuring operator safety and environmental compliance.
• High-Efficiency PVC Granulator: Pre-processing granulator reduces bulk PVC waste into uniform 3–6 mm particles for consistent, stable feeding into the extruder.
• Precision Pelletizing: Die-face hot cut pelletizing with air-cooled cyclone conveying (standard configuration) produces uniform 2–4 mm PVC pellets with consistent shape and size; water-cooled die-face or underwater pelletizing can be configured for specific formulations.
• Energy Recovery System: Heat exchangers capture and reuse excess thermal energy from the extrusion process to reduce overall power consumption.

Multi-zone temperature control, corrosion-resistant screw and barrel, and stabilizer dosing keep PVC melt inside the stable 160–200°C processing window.

PVC Granulating Pelletizing Process Workflow

1. Sorting & Inspection: Incoming PVC scrap is inspected and sorted to remove non-PVC contaminants including metals (via magnetic separator), rubber, and incompatible plastics.
2. Coarse Crushing: Bulk PVC waste such as pipes, profiles, or cable scrap is fed into a primary crusher that reduces material into 20–50 mm chunks.
3. Fine Granulation: Crushed material passes through a high-efficiency granulator that produces uniform 3–6 mm granules for consistent extrusion feeding.
4. Drying (Optional): If the PVC granules contain moisture, a dehumidifying dryer removes it to prevent steam generation and surface defects during extrusion.
5. Additive Blending: PVC granules are accurately blended with heat stabilizers, lubricants, plasticizers, and colorants using a gravimetric dosing system and a high-speed heating and cooling mixer unit.
6. Twin-Screw Extrusion: The PVC compound is fed into a twin-screw extruder operating at 160–200°C, where it is melted, thoroughly mixed, degassed, and homogenized under precise temperature control.
7. Pelletizing: The homogeneous PVC melt is forced through a die head and cut into uniform 2–4 mm pellets by the die-face hot cut system. The standard line uses air cooling with cyclone conveying, while water-cooled die-face or underwater pelletizing is available for specific formulations.
8. Cooling & Dehumidifying: In the standard configuration, hot-cut pellets are cooled during air conveying and cyclone separation, so they stay dry and need no separate drying step. When a water-type pelletizer is configured, pellets pass a water bath and centrifugal dryer to reach below 0.5% moisture content.
9. Screening: Vibratory sieves remove undersized fines, oversized particles, and irregular pellets to ensure uniform product quality.
10. Packaging: Finished recycled PVC pellets are conveyed to storage silos or automatically weighed and bagged for industrial sale or in-house reuse.

The complete PVC granulation line route runs from scrap sorting and size reduction through additive dosing, twin-screw extrusion, pelletizing, cooling and screening.

Why PVC Needs a Dedicated Pelletizing Line

PVC cannot be processed like polyolefins. When PVC overheats or stays in the barrel too long, it thermally degrades and releases corrosive hydrogen chloride gas that damages standard screws and barrels and destroys material properties. This is why a general-purpose plastic pelletizing machine is not a safe choice for PVC scrap recycling.

The SUHUI PVC pelletizing machine configuration is engineered around this constraint: temperature is controlled in independent zones within the stable 160–200°C window, residence time is kept short and consistent, contact components are corrosion-resistant, heat stabilizers are dosed in-line, and any process emissions are captured by the integrated fume extraction system. As a PVC pelletizing extrusion line manufacturer based in Zhangjiagang, China, SUHUI configures each production line around the customer’s PVC scrap type and supplies it factory-direct with export and after-sales support.

Main configuration of the SUHUI PVC granulating pelletizing line: feeding hopper, twin-screw extruder, die-face pelletizing, air cooling and conveying, cyclone separator and pellet discharge hopper.

Technical Specifications

Key parameters of the standard SUHUI PVC granulating pelletizing line configuration:

Exact extruder model, output capacity and total installed power are matched to each project and confirmed with the quotation.

Recycled PVC Pellet Quality and Applications

The line produces uniform 2–4 mm recycled PVC pellets with consistent geometry, screened by vibratory sieves to remove fines and oversized particles. Stable pellet quality is what allows recycled PVC to re-enter demanding downstream processes instead of being downcycled.

Uniform, screened recycled PVC pellets are ready for pipe, profile, cable and fitting production.

Typical destinations for the recycled pellets include PVC pipe extrusion lines, PVC profile extrusion lines, cable compounding, and injection-molded fittings. For factories running their own extrusion workshops, the pelletizing line closes the loop between production scrap and raw material supply.

Recycled PVC pellets feed pipe, profile, cable insulation and fitting production.

Frequently Asked Questions

Can PVC be recycled?

Yes. PVC is recyclable through mechanical recycling, but it requires a dedicated process route. Because PVC is thermally sensitive and releases corrosive gas when overheated, PVC scrap should be sorted from other plastics and processed on equipment with precise temperature control, corrosion-resistant components, and fume extraction — exactly what a PVC granulating pelletizing line provides. For a broader view of which plastics can be recycled industrially, see our guide on what plastics can be recycled.

What types of PVC waste can the SUHUI PVC granulating pelletizing line process?

The line processes a wide range of rigid and flexible PVC scrap, including industrial offcuts, construction waste, cable insulation, window profile scraps, and post-consumer PVC products. Incoming material is sorted to remove non-PVC contaminants such as metals, rubber, and incompatible plastics before entering the granulation and extrusion stages.

Can the line handle both rigid uPVC and flexible PVC without equipment reconfiguration?

Yes. The SUHUI PVC pelletizing line supports both rigid uPVC and flexible plasticized PVC without requiring screw or die reconfiguration. This dual compatibility maximizes line versatility and reduces changeover downtime for recyclers processing mixed PVC feedstock streams.

How does the system prevent PVC thermal degradation during extrusion?

The line uses precision multi-zone temperature control with independent heating and cooling zones along the barrel and die, maintaining melt temperature within the stable processing range of 160–200°C. Corrosion-resistant barrel, screw, and die components withstand acidic byproducts, while in-line gravimetric dosing systems add heat stabilizers and lubricants directly into the extrusion process to further protect material quality.

What pellet size does the line produce, and what pelletizing methods are available?

The line produces uniform 2–4 mm recycled PVC pellets with consistent shape and size. The standard configuration uses die-face hot cutting with air cooling and cyclone conveying, as shown on this page; die-face water cooling or underwater pelletizing can also be configured for specific PVC formulations. All options suit downstream pipe manufacturing, cable compounding, and profile extrusion, and a vibratory screening stage removes undersized fines and oversized particles to ensure uniform product quality.

Does the line include a fume extraction system for operator safety?

Yes. An integrated fume extraction system with activated carbon filters and forced ventilation captures and neutralizes corrosive gas emissions generated during PVC processing. This ensures operator safety and supports compliance with workplace air quality and environmental regulations.

What additives can be incorporated during the PVC pelletizing process?

The line includes a gravimetric dosing system that accurately adds heat stabilizers, lubricants, plasticizers, and colorants directly into the extrusion process. This in-line additive integration allows precise compound formulation without separate pre-blending equipment, enabling the production of recycled PVC pellets tailored to specific downstream application requirements.

What can recycled PVC pellets be used for?

Recycled PVC pellets from this line are used to manufacture PVC pipes, window and door profiles, cable insulation and sheathing, fittings, hoses, and flooring products. Pellet uniformity and controlled formulation allow the material to run stably on standard PVC extrusion and injection molding equipment. Contact SUHUI to match the line configuration to your PVC scrap type and target output.