Home/FlowTex Dewatering Technology • Manufactured in South Africa
Dewatering Fabric Selection Guide
Compare monofilament, slit-film woven and composite filters by solids, opening size, drainage, strength and site duty.
Dewatering Fabric Selection Guide
Selected for your slurry. Manufactured for your project.
Start with a representative feed sample, particle-size distribution, dry-solids concentration, chemistry and target filtrate quality. Select the filter and structural enclosure together.
Product selection
Specifications that inform the right choice
Compare the published grades, then confirm the supplied construction and project requirements in the technical submission.
| FlowTex grade | Polymer | O90 (µm) | Normal permeability (mm/s) | Tensile MD/CD (kN/m) | CBR puncture (kN) |
|---|---|---|---|---|---|
| Mono 180 | PP | 180 | 50 | 40 / 40 | 6 |
| Mono 350 | PE | 350 | 300 | 44 / 35 | 4 |
| Mono 600 | PE | 600 | 350 | 41 / 35 | 3.5 |
Technical notes and test basis
Reference fabric averages. O90: EN ISO 12956; normal permeability: EN ISO 11058; tensile: EN ISO 10319; puncture: EN ISO 12236. Not finished-bag pressure, throughput or lifting ratings. O90 is not an absolute particle cut-off.
| FlowTex grade | Tensile MD/CD (kN/m) | O90 (µm) | Normal permeability (mm/s) | Mass (g/m²) |
|---|---|---|---|---|
| HF45 | 45 / 45 | 600 | 40 | 210 |
| HF60 | 60 / 60 | 600 | 27 | 280 |
| HF105 | 105 / 105 | 300 | 25 | 500 |
Technical notes and test basis
Nominal reference fabric values, subject to stated tolerances and the current project submission. Tensile: EN ISO 10319; O90: EN ISO 12956; normal permeability: EN ISO 11058; mass: EN ISO 9864. Fabric strength is not seam strength or allowable filling pressure.
| FlowTex liner | O90 (µm) | Normal permeability (mm/s) | Tensile MD/CD (kN/m) | Mass (g/m²) | CBR puncture (kN) |
|---|---|---|---|---|---|
| CF100 | 100 | 85 | 16 / 16 | 200 | 2.35 |
| CF95 | 95 | 70 | 20 / 20 | 250 | 3.00 |
| CF90 | 90 | 55 | 25 / 25 | 300 | 3.85 |
| CF85 | 85 | 55 | 30 / 30 | 385 | 4.50 |
Technical notes and test basis
Properties of the inner continuous-filament polypropylene nonwoven only, not the assembled composite. O90: EN ISO 12956; normal permeability at 50 mm head: EN ISO 11058; tensile: EN ISO 10319; mass: EN ISO 9864; CBR: EN ISO 12236. Values are indicative averages. Outer-shell and liner strengths must not be added. Verify the complete assembly in trials.
From specification to site
Fabrication, QA/QC & African project supply
Choose by the slurry
Coarse, medium and fines are selection routes, not universal particle-size cut-offs. Mixed feeds, dispersive clay, organics and flocculated solids behave differently. Compare initial filtrate and performance after cake formation.
Compare like-for-like tests
O90 and ASTM apparent opening size are different measurements. Clean-water permeability describes a fabric under a stated test; it cannot be multiplied by bag area to promise slurry throughput.
Confirm the assembly
Specify circumference or lay-flat dimensions, length, port geometry, seam orientation, filling limits and handling. Obtain the grade-specific technical submission and a representative trial before full-scale manufacture.
FAQ
Frequently asked questions
Are FlowTex dewatering bags and tubes available from stock?
FlowTex holds stock for immediate supply. Ask for the available grade, dimensions and quantity; allocation is confirmed for the order. Custom dimensions or a different construction require a fabrication programme. Dispatch readiness and delivery time are confirmed separately.
What should I provide for a firm technical quotation?
Send the application, wet volume or flow, solids concentration and measurement basis, particle information, chemistry, filtrate target, dimensions, quantity, destination and required date. Identify any loaded handling requirement.
How is the fabric choice confirmed?
Compare published grade properties with representative slurry trials and the fabricated assembly requirements. The supplied construction, filling limits and handling arrangement are agreed for the actual project.
Discuss your dewatering specification
Send the feed, volume, filtrate target, dimensions, location and programme. We will help define the next step.