Self-cleaning Screen Changer

The Self-Cleaning Screen Changer integrates a complete filtration system, comprising a main body, inner screens, scrapers, a slag discharge screw, and other components. Housed in a fully sealed main body, the inner screen filters impurities from the melt flow, with impurities adhering to the screen surface. As impurities accumulate, the internal operating pressure of the screen changer gradually rises to a preset value—triggering a pressure sensor that activates the scraper. Then the scraper removes impurities from inner screen surface, which are discharged via the slag discharge channel. The entire filtration process is automated via sensors and control system, requiring no manual intervention. Unlike conventional screen changers, it also eliminates the need for frequent screen replacement.

Advantages of Self-Cleaning Screen Changer
1. Fully Automated Filtration: The entire filtration process is sensor- and control system-driven, requiring zero manual intervention—significantly reducing labor costs.
2. Continuous High-Efficiency Filtration: Unlike conventional screen changers, it operates continuously for months without frequent screen replacements.
3. Superior Durability: Constructed with alloy materials and treated with nitriding, it features a robust structure, high-temperature resistance, and corrosion resistance—ideal for long-term high-load operations.
4. High Production Capacity: Its exclusive dual inner screens and dual scrapers design doubles the filtration area, with a maximum output of 2.5 tons per hour.
5. Easy Operation: Operators can master installation and setup after simple training.
6. Simplified Maintenance: A modular design and integrated lifting arm facilitate easier maintenance and part replacement.
7. Low Consumable Usage: The inner screen is the only consumable. Made from high-quality alloy steel, each screen lasts 2–6 months depending on operating conditions.
8. High Cost-Efficiency: While the initial investment is higher, its long-term benefits—including high efficiency, durability, and low maintenance costs—deliver strong cost-effectiveness.

Disadvantages of Self-Cleaning Screen Changer
Compared to other screen changers, the self-cleaning screen changer has a higher upfront investment. Additionally, its larger size requires more installation space. It is limited to a lower working pressure (maximum 20Mpa) and a filtration accuracy of up to 120 mesh—lower than that of plate or piston-type screen changers.

Self-Cleaning Screen Changer: Its unique design enables continuous production, eliminating the need for frequent screen replacements unlike conventional models. It is ideal for high-output, continuous-production scenarios, including:
◆ Most polymer recycling line
◆ Granulation line(strand and underwater granulation)
◆ Sheets line(foam, strapping, plastic boards)
◆ Pipes and profiles line
◆ Compounding line(masterbatches, fillers)
◆ Wire and cable extrusion line
◆ Pipes line(medical, industrial, irrigation)
◆ Fibers line(monofilaments)
◆ Blow molding line
◆ Meltblown/spunbond nonwovens line
◆ Melt blown/spunbond non-woven fabrics​
◆ Granulation (strand and underwater granulation)​
◆ Plastic recycling