Double Column Screen Changer for Water Supply and Drainage Pipe Extrusion Lines
The double column screen changer is a core continuous filtration device widely used in PE, PVC, HDPE and other plastic water supply and drainage pipe extrusion production lines. It adopts dual-station alternate operation, enabling non-stop screen replacement while maintaining stable melt pressure and production continuity.
In pipe extrusion, molten plastic contains impurities and carbon deposits that easily cause defects such as spots, cracks and dimensional deviations, which seriously affect pipe pressure resistance and service life. The double column screen changer uses large-area filter screens to efficiently remove contaminants, protect dies and downstream equipment, and ensure uniform wall thickness and smooth surface of pipes.
Its hydraulic drive system realizes fast and stable station switching within seconds, with pressure fluctuation controlled within ±0.3 MPa. The sealed structure prevents material leakage and oxidation, adapting to long-term high-temperature and high-pressure working conditions. Compared with single-column models, it offers larger filtration area, longer service life and lower downtime, significantly boosting hourly output.
This equipment is highly compatible with small-batch customized production and large-scale continuous extrusion lines. It supports easy installation on new or existing extruders and melt pumps, with simple operation and low maintenance. For water supply and drainage pipe manufacturers, applying double column screen changers markedly improves product qualification rate, reduces material waste, and enhances overall production efficiency and market competitiveness.
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