Industrial belts and dewatering fabrics
Beyond paper machine clothing, Hengfeng manufactures polyester belts and fabrics for solid-liquid separation, washing, filtration and conveying duties. The same monofilament extrusion, weaving, heat setting, seaming and inspection lines used for our paper machine fabrics are applied here. These products are specified from the process medium and equipment geometry rather than from a paper grade, so a written configuration review is part of every enquiry.
Typical duties
Common applications include belt filter presses for sludge dewatering, vacuum belt washers, pulp and fibre washing, effluent filtration, and drying or conveying lines in food, chemical, mining and environmental processes. Each duty places a different demand on void volume, retention, cake release, abrasion resistance and dimensional stability.
Because the belt interacts with the machine as well as the medium, we ask for the equipment type, roller and tracking arrangement, and the joining method before proposing a structure. A belt that performs well on one press can track poorly on another with a different roller geometry.
Material and chemical compatibility
Polyester is the usual starting point, with other polymers reviewed where temperature, pH, solvent or oxidising conditions require them. Hydrolysis resistance, acid and alkali resistance and thermal limits are confirmed against the actual process window. Where anti-static behaviour or food-contact requirements apply, these are recorded as explicit conditions on the specification rather than assumed.
Joining, edges and serviceability
Seam type, edge reinforcement and the ability to repair a local section are frequent selection criteria for industrial belts. We confirm the joining arrangement against the machine builder limits and provide an installation and tensioning checklist with the delivery documentation.
Configurable dimensions
- Weave structure and layer construction
- Monofilament material, diameter and any anti-static requirement
- Void volume / permeability target with stated test conditions
- Seam or endless joining method
- Finished width, length and edge treatment
- Temperature, pH and chemical exposure limits
- Surface finish for cake release or product support
Information to send for a configuration review
Please provide the process and equipment details below. Unknown items may be left blank.
- Application and equipment type (belt press, vacuum washer, dryer, conveyor)
- Process medium, solids content, temperature and pH range
- Cleaning chemicals, washing pressure and cleaning frequency
- Belt width, length, roller diameter and tracking arrangement
- Required joining method and any machine-builder restrictions
- Current belt construction, observed wear and failure location
- Target throughput and any cake-release or retention problems
Industry reference specifications (public sources) — not Hengfeng measurements
These are publicly published, industry-common reference values transcribed from third-party supplier and competitor pages on 9 November 2026, with the source and test conditions shown beside each table. They are NOT Hengfeng test results, NOT a Hengfeng product specification, and NOT a performance or supply commitment. They exist so that a technical discussion can start from comparable terms. Final values are confirmed in a written specification against your machine conditions.
Spiral dryer fabric loop types (published parameter table)
Spiral link fabrics are commonly classified as small, medium, large or super loop. The table below reproduces the widely republished loop specification table, including its own dual-unit permeability columns.
| Loop type | Loop width (mm) | Spiral filament Ø (mm) | Connection wire Ø (mm) | Tensile strength (N/cm) | Weight (kg/m²) | Thickness (mm) | Air permeability (m³/m²·h) | Air permeability (CFM @127 Pa) |
|---|---|---|---|---|---|---|---|---|
| Small loop | 5–5.2 | 0.50 | 0.80 | 1800 | 1.00 | 2.10 | 15000 | 937 |
| Medium loop | 8 | 0.68 | 0.90 | 2000 | 1.31 | 2.45 | 18000 | 1125 |
| Medium loop | 7.15 | 0.68 | 0.90 | 2000 | 1.40 | 2.45 | 16000 | 1000 |
| Medium loop | 7.2 | 0.70 | 1.00 | 2200 | 1.50 | 2.45 | 16800 | 1050 |
| Large loop | 8 | 0.90 | 0.90 | 2300 | 1.80 | 3.03 | 19000 | 1188 |
| Large loop | 10 | 0.90 | 1.10 | 2300 | 1.65 | 3.15 | 20000 | 1250 |
| Large loop | 12 | 1.20 | 1.30 | 2600 | 2.35 | 4.30 | 22000 | 1375 |
| Heat-resisting HTR-01 | 6.48 | 0.90 | 0.90 | 2000 | 1.90 | 3.30 | 14000 | 875 |
Test conditions & comparability
The source labels the CFM column "127/pa"; the m³/m²·h column is published without an explicit pressure. A second supplier table lists 840 / 890 / 1000 / 1170 ±30 CFM for small / medium / large / super loop without a stated condition — these two sets must not be compared as if they were equivalent.
- Loop width may be published as a single dimension (e.g. 8 mm) or as a pair (e.g. 4.8 × 10 mm) depending on the supplier table; both notations are kept as published.
- Some spiral belts are filled with round or flat stuffer yarns to reduce permeability, so a delivered belt can differ substantially from the unfilled table value.
Public sources
- Leizhan spiral dryer screen parameter table
- polyestermesh.org spiral mesh table
- HUATAO spiral dryer screen table
Accessed: 2026-11-09
Herringbone polyester dewatering / filter belt table
This nine-row table is republished across many Chinese filter-media sites and is widely used as a starting point for sludge dewatering, pulp washing and juice pressing belt discussions.
| Mesh no. | Warp Ø (mm) | Weft Ø (mm) | Density warp / weft (roots/cm) | Strength face / clipper seam (N/cm) | Water permeability (S/5L) | Weight (kg/m²) | Thickness (mm) | Air permeability (m³/m²·h) |
|---|---|---|---|---|---|---|---|---|
| 2470 | 0.50 | 0.70 | 24 / 9 | 2000 / 900 | 56.4 | 1.23 | 1.90 | 6130 |
| 26808 | 0.50 | 0.80 | 27 / 8.5 | 2100 / 900 | 60.3 | 1.54 | 2.20 | 5120 |
| 27708 | 0.50 | 0.70 | 28 / 8.5 | 2200 / 900 | 63 | 1.53 | 2.10 | 4120 |
| 22903 | 0.50 | 0.90 | 23 / 5.5 | 2000 / 900 | 48 | 1.40 | 1.90 | 6800 |
| 16803 | 0.70 | 0.80 | 16.3 / 5.9 | 3200 / 1200 | 70 | 1.45 | 1.976 | 5500 |
| 16903 | 0.70 | 0.90 | 17 / 4.5 | 2200 / 900 | 38.6 | 1.70 | 2.0 | 7920 |
| 16903-1 | 0.70 | 0.90 | 16.3 / 5.5 | 3200 / 1200 | 50 | 1.52 | 2.263 | 6500 |
| 121103 | 0.90 | 1.10 | 12.5 / 3.8 | 3600 / 900 | 32.4 | 1.60 | 2.60 | 8610 |
| 151105 | 0.90 | 1.1 | 16 / 6.3 | 4500 / 1200 | 90 | 2.45 | 2.843 | 3800 |
Test conditions & comparability
The published table gives no test pressure for the air-permeability column and no test method for the S/5L water-permeability column. It is a catalogue reference, not an acceptance test.
- The source notes that 16803, 16903 and 16903-1 are used for juice pressing, sludge dewatering and pulp washing.
Public sources
- Sludge dewatering belt parameter table (widely republished)The same nine-row table appears on several Chinese supplier pages; one source is cited rather than listing duplicates.
- Goepe reprint of the dewatering belt table
Accessed: 2026-11-09
Polyester plain / square-hole mesh examples
Square-hole mesh is specified by filament diameter, density, mesh count, aperture and air permeability. Multiple test conditions are often printed in the same table, so the condition column must be read with the value.
| Code | Filament Ø warp / weft (mm) | Density warp / weft (roots/cm) | Weight (kg/m²) | Thickness (mm) | Aperture warp / weft (mm) | Air permeability (m³/m²·h) | CFM @127 Pa | Open area (%) |
|---|---|---|---|---|---|---|---|---|
| 021002 | 1.0 / 1.0 | 2.85 / 2.65 | 0.60 | 1.85 | 2.50 / 2.77 | 32000 | 2000 | 52.55 |
| 031002 | 1.0 / 1.0 | 3.2 / 3.25 | 0.80 | 1.86 | 2.12 / 2.07 | 25600 | 1600 | 45.9 |
| 03902 | 0.9 / 0.90 | 3.9 / 3.65 | 0.55 | 1.70 | 1.66 / 1.83 | 20000 | 1250 | 46.58 |
| 04902 | 0.9 / 0.9 | 4.65 / 4.7 | 0.95 | 1.66 | 1.25 / 1.22 | 17600 | 1170 | 33.55 |
| 06802 | 0.80 / 0.80 | 6.6 / 6.5 | 0.85 | 1.45 | 0.72 / 0.73 | 11600 | 725 | 22.65 |
| 06702 | 0.70 / 0.70 | 7 / 7 | 0.77 | 1.30 | 0.72 / 0.72 | 11000 | 690 | 26.01 |
| 09502 | 0.50 / 0.50 | 9.7 / 10.3 | 0.50 | 0.90 | 0.53 / 0.47 | 10100 | 634 | 24.97 |
Test conditions & comparability
The source prints an m³/m²·h column, a CFM @127 Pa column and a separate L/m²/s @200 Pa column. A Chinese reprint of a similar table labels the 200 Pa l/m²/s figure (e.g. 12600 for 021002) simply as "air permeability" — a unit/condition mix-up. This site keeps the original column separation and performs no conversion.
- Four joint types are listed by another supplier for the same family: stainless-steel clipper, endless, spiral ring and pin ring.
Public sources
Accessed: 2026-11-09
Air-permeability values are comparable only when the unit, differential pressure and test method match. The tables above come from different sources, some without a stated test condition, and cannot be used as acceptance criteria or a performance promise. Binding values are those in the mutually confirmed written specification.
Frequently asked questions
Do you publish a standard industrial belt catalogue?
We do not publish a fixed Hengfeng model catalogue. The tables below are industry-common reference values transcribed from public supplier sheets with source and test conditions; they are not Hengfeng measurements. Each belt is configured against the process medium and equipment geometry, and the written specification is issued with the quotation.
Can the belt be supplied endless or with a seam?
Both arrangements can be reviewed. The choice depends on your machine builder limits, installation access and whether local repair is required.
Are these belts manufactured by Hengfeng?
Yes. They are produced in-house on the same monofilament, weaving, heat-setting, seaming and inspection lines as our paper machine fabrics.
Hengfeng manufactures this family in-house. The parameter tables on this page are publicly published, industry-common reference values transcribed from third-party supplier and competitor pages, with each source and test condition shown next to the table. They are NOT Hengfeng measurements, NOT a Hengfeng product specification and NOT a performance or supply commitment. Model designations, permeability, dimensions and seam details are configured against your machine conditions and become binding only in a written specification. Request a configuration review for that specification.
Request an industrial belt configuration
Describe the process medium and equipment. We will confirm structure, material and seam before quoting.
Send an enquiry