Precision Belt Filter Cloth for DLW Horizontal Vacuum Belt Filters
Skytech Ultrafab Horizontal Belt Filter (DLW) Cloth is engineered for continuous-operation horizontal vacuum belt filters — also known as DLW (Dorr-Oliver/Larox-Weir) or horizontal belt vacuum filters — used for high-throughput dewatering of mining slurries, chemical precipitates, phosphate concentrate, gypsum, and paper pulp. Precision-woven from polypropylene or polyester monofilament to exact DLW filter specifications, the cloth provides optimal drainage rate, cake release, and dimensional stability under the continuous tension and vacuum loading of 24/7 belt filter operation.
What Is a Horizontal Belt Filter (DLW)?
A Horizontal Belt Filter (DLW) is a continuous-operation vacuum filtration machine where a moving filter cloth belt passes over a series of vacuum boxes. Slurry is fed onto the belt, vacuum is applied through the cloth, and liquid drains away while a filter cake builds on the upper surface. The cake is washed and further dewatered as the belt advances, then discharged at the belt end before the cloth returns for the next cycle. The filter cloth must combine correct porosity with the dimensional stability to run continuously under tension and vacuum without stretching, creeping, or tracking off the belt.
Features and Benefits
- Precision Woven Monofilament: Woven from SS 316L or PP/PES monofilament yarn for precise, consistent aperture across the full belt width — uniform drainage rate prevents cake non-uniformity and channelling
- Dimensional Stability Under Tension: Heat-set woven construction maintains precise belt width and length under the continuous mechanical tension of the belt drive system — no elongation or width creep over time
- Anti-Tracking Edge: Straight-woven selvedge edges and optional guide strips prevent belt tracking problems that cause cloth damage and process disruption in continuous DLW operation
- Excellent Cake Release: Smooth monofilament surface minimises cake adhesion — clean discharge at the belt head reduces cloth carry-over, belt washing water consumption, and cloth blinding rate
- Low Blinding Rate: Open weave construction with high free area percentage maintains drainage capacity over long continuous operating periods between cloth cleaning intervals
- Custom Width and Joint: Belt width from 500 mm to 3500 mm fabricated to DLW filter specification; seamless or welded joint options for continuous belt installation
Technical Specifications
| Parameter | Details |
|---|---|
| Available Materials | Polypropylene Mono, Polyester Mono, Nylon Mono |
| Weave Patterns | Plain, Twill, Satin — application optimised |
| Micron Rating | 50 µm – 1000 µm |
| Belt Width | 500 mm – 3500 mm |
| Max Temperature | PP: 90°C | PES: 135°C |
| Joint Type | Clipper lace, welded splice, or seamless |
| OEM Compatibility | Dorr-Oliver, Larox-Weir (DLW), Delkor, Outotec |
| Tensile Strength | ≥ 3500 N per 5 cm width |
Applications
- Mining Concentrate Dewatering: Copper, gold, iron ore, and coal concentrate dewatering on DLW horizontal belt filters — high tonnage continuous operation with maximum throughput
- Phosphate Processing: Phosphate rock slurry dewatering and phosphogypsum cake formation in horizontal belt filter operations in fertiliser production
- Chemical Precipitation: Calcium carbonate, barium sulphate, titanium dioxide, and other chemical precipitate dewatering in continuous DLW belt filter systems
- Paper Pulp: Pulp and paper process water solids recovery and paper fibre dewatering on horizontal vacuum belt filters in pulp mills
- Gypsum and FGD: Flue gas desulphurisation (FGD) gypsum dewatering in power plant belt filter systems — demanding application combining high throughput with corrosive slurry chemistry
Why Choose Skytech Ultrafab for Horizontal Belt Filter (DLW)?
- DLW OEM Specification Matched: Belt dimensions, weave, and edge detail fabricated to exact Dorr-Oliver, Larox-Weir, and equivalent OEM specifications — guaranteed fit and performance on the first installation
- Continuous Operation Durability: Heat-set dimensional stability and abrasion-resistant monofilament construction designed for 24/7 continuous belt filter operation with minimal stretch or tracking problems
- Application Engineering: Belt filter cloth specification — weave type, monofilament diameter, and open area — selected for each slurry type to balance drainage rate, cake release, and belt life
- Competitive Cost: Indian manufacturer pricing delivers significant cost advantage versus imported European belt filter cloth without compromising weave precision or dimensional specification
- Rapid Custom Production: Standard widths and weave types in 10–14 working days; custom widths and non-standard specifications in 15–21 working days from drawing confirmation
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