Rotary Drum Filter
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Classification
Advantages
1. Low-moisture filter cake, adaptable to various filtration precision levels.
2. High pressure resistance; available in multiple materials such as PP, PET, PA, etc.
3. Smooth surface facilitates easy cake detachment.
Applications
1. Filtration in pulp and paper making.
2. Chemical industry processes.
3. Filtration of mineral concentrates in mining.
Special Heat‑Shrinkable Screen for Vacuum Rotary Drum Washers
Heat‑shrink seamless wrapping: tight fit, zero leakage, and high extraction rate.
Efficient dewatering and washing: fast drainage, high consistency, and cleaner pulp.
Superior wear and corrosion resistance:long service life, low screen consumption, and significant cost reduction.
Stable operation and easy maintenance: no misalignment, no clogging, and quick installation.
1. Premium Specialty Materials
Base material:high‑strength polyvinylidene fluoride (PVDF) monofilament.
PVDF features: premium corrosion‑resistant grade offering exceptional chemical resistance (strong acids, alkalis, and organic solvents), abrasion resistance, high‑temperature tolerance (up to 110 °C), and extended service life.
Yarn characteristics:imported high‑precision round monofilaments with uniform diameter, smooth surface, non‑sticking to pulp, and easy cleaning.
2. Precision Weave Structure (Mainstream Specifications)
Weaving process:multi‑layer composite weave (1.5‑layer / 2‑layer) in high‑density satin or twill patterns.
Top layer:fine‑denier monofilaments providing uniform, dense mesh openings – rapid drainage, good fiber retention, and light screen marks.
Bottom layer:coarse‑denier monofilaments offering strong support, high stiffness, and stable air permeability.
Core Technical Advantages (Key Selling Points)
1. Heat‑shrink seamless wrapping eliminates pulp leakage.
During installation, steam or hot‑air heating causes the screen to shrink precisely, achieving 100% conformity to the drum surface – no gaps, no wrinkles, no edge lifting. This thoroughly resolves common issues of loose screens, pulp leakage, and black‑liquor short‑circuiting, improving the extraction rate by 3%–5%.
2. Efficient dewatering and washing with high black‑liquor extraction.
Free drainage and high fiber retention yield a pulp consistency of 8%–12% and low residual alkali in the black liquor. Multi‑stage counter‑current washing delivers excellent results, producing high‑purity pulp with reduced bleaching agent consumption.
3. Superior wear and corrosion resistance for extended service life.
High‑strength monofilaments resist wear and fatigue, maintaining integrity during continuous operation without easy abrasion or filament breakage. The screen withstands acids, alkalis, temperature, hydrolysis, and aging, making it suitable for harsh conditions. Its service life is 50%–100% longer than that of conventional screens, significantly reducing screen consumption.
4. Stable and reliable operation with easy maintenance.
The screen body is stiff and flat with uniform tension – no misalignment and no wrinkling. The smooth surface resists pulp adhesion, and high‑pressure water washing ensures easy cleaning and prevents pore clogging. Quick installation (heat‑shrink mounting completed within 4–6 hours) minimizes downtime for screen replacement.
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