Industry-common PMC specification reference
Model codes, construction families and measurement units for paper machine clothing are shared across the industry, and comparable parameter tables are published by many suppliers. This page gathers eleven public tables, each with its source link, test conditions and unit caveats, so a technical enquiry can start from comparable terms.
Tables on this page
- 01 Typical air-permeability ranges by dryer fabric construction
- 02 Published dryer fabric model examples
- 03 Published forming fabric model examples
- 04 Spiral dryer fabric loop types (published parameter table)
- 05 BOM press felt structures (published layer table)
- 06 Herringbone polyester dewatering / filter belt table
- 07 Pulp washing and high-speed washing mesh examples
- 08 Polyester plain / square-hole mesh examples
- 09 PET monofilament diameter / linear density reference
- 10 Published PET monofilament property windows
- 11 Nonwoven production forming mesh examples
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.
The tables below are shared across the industry: the same model codes, weave structures and measurement units appear in many public supplier catalogues. Use them to frame a comparison, then confirm the actual build with us in writing.
Typical air-permeability ranges by dryer fabric construction
Four woven dryer constructions are commonly organised by air-permeability band. These bands are published as ranges for a structure, not as a value for a specific delivered fabric.
| Construction | Published air-permeability range (CFM) | Published positioning |
|---|---|---|
| Flat yarn, single warp | 160–750 CFM | High air permeability demand; smooth, wide contact area |
| Flat yarn, double warp | 90–375 CFM | Low-to-medium permeability; surface and seam strength |
| Round yarn, 1.5-layer | 400–500 CFM | Hydrolysis-resistant round yarn; packaging grades |
| Round yarn, 2-layer | 500–750 CFM | Hot and dry dryer positions; hydrolysis resistance |
Test conditions & comparability
Test pressure and method are NOT stated on the source pages. CFM figures measured under a different pressure must not be compared with these values.
- The four figures come from four separate grade pages; the source does not publish a single combined table.
Public sources
- Hehuang (forming-dryerfabrics.com)
- Hehuang (forming-dryerfabrics.com)
- Hehuang (forming-dryerfabrics.com)
- Hehuang (forming-dryerfabrics.com)
Accessed: 2026-11-09
Published dryer fabric model examples
Model codes such as GW22504K and BGW22608 are used across the industry. The rows below show how one public source documents the same family: note that a single code (SJ16904) can appear in several distinct configurations.
| Model / configuration | Construction | Warp / weft density (ends/cm) | Yarn (mm) | Air permeability | Caliper (mm) |
|---|---|---|---|---|---|
| GW22504K | 4-shed double-layer flat weave, spiral seam | 22.5–23.5 / 12.0–13.0 | Warp and weft Ø0.50 PET (round, hydrolysis-resistant) | 11,200 m³/m²·h (709 CFM) | 2.00 |
| BGW22608 | 8-shed 1.5-layer, mini-ring seam | 22.0–22.6 / 13.5–14.5 | Warp 0.60 × 0.40 PET (flat); weft Ø0.60 / Ø0.50 PET | 4,740 m³/m²·h (300 CFM) | 1.60 |
| SJ16904 — single hanger group 1 | Documented configuration 1 | 16.2 / 9.5 | Warp 0.36 × 1.06; weft 0.90 / 0.60 | 1,817 m³/m²·h (115 CFM) | 1.62 |
| SJ16904 — single hanger group 2 | Documented configuration 2 | 16.2 / 9.0 | Warp 0.36 × 1.06; weft 0.90 / 0.60 | 2,000 m³/m²·h (125 CFM) | 1.62 |
| SJ16904 — single hanger group 4 | Documented configuration 4 | 16.2 / 6.5 | Warp 0.36 × 1.06; weft 0.90 / 0.60 | 4,500 m³/m²·h (285 CFM) | 1.60 |
| LF-22504 | Plain-woven round yarn, 1.5 / 2-layer | 25–26 / 17–18 | — | 12,000 m³/m²·h (760 CFM) | — |
Test conditions & comparability
The PAPTEX GW22504K / BGW22608 comparison explicitly states that neither source sheet gives the test pressure, and that the listed ≥2,000 N/cm break tenacity is neither an operating-tension rating nor a seam-strength value. The Longfeng page does not state the test pressure either.
- Two suppliers publish different density and permeability values under similar "22504" codes. Never treat a model code as a specification.
Public sources
- PAPTEX (paptexpmc.com)Model sheets explicitly state that values are transcribed from reviewed technical parameter sheets and require machine-condition confirmation.
- PAPTEX GW22504K model pageModel sheets explicitly state that values are transcribed from reviewed technical parameter sheets and require machine-condition confirmation.
- PAPTEX SJ16904 configurationsModel sheets explicitly state that values are transcribed from reviewed technical parameter sheets and require machine-condition confirmation.
- Longfeng LF-22504 page
Accessed: 2026-11-09
Published forming fabric model examples
Forming fabric sheets are normally organised by shed count, layer count, warp/weft density, yarn diameters and air permeability. The same code can carry slightly different densities in another supplier sheet.
| Model | Construction | Warp / weft density (ends/cm) | Warp yarn (mm) | Weft yarn (mm) | Air permeability | Caliper (mm) | Fiber Support Index (as published) |
|---|---|---|---|---|---|---|---|
| 2B3616 | 8/16-shed, 2.5-layer | 40.5–41.5 / 32–36 | Ø0.26 PET | Ø0.30 / Ø0.20 / Ø0.50 PET; Ø0.50 PA | 7,000–8,200 m³/m²·h (445–519 CFM) | 1.420 | 82–98 |
| 2B603516 | 8/16-shed, 2.5-layer | 65.5–66.5 / 58.0–61.0 | Ø0.17 PET | Ø0.20 / Ø0.13 / Ø0.35 PET; Ø0.35 PA | 4,900 m³/m²·h (310 CFM) | 1.03 | 154 |
| 2C60188 | 8-shed | 66–68 / 56–67 | Ø0.17 PET | Ø0.20 / Ø0.13 / Ø0.25 PET; Ø0.25 PA | 4,200–6,000 m³/m²·h (265–380 CFM) | 0.750 | 125 |
| LF-2B3616 | 2.5-layer, weft-double weave | 40.5–41.5 / 34.5–35.5 | — | — | 7,000 m³/m²·h (450 CFM) | — | — |
Test conditions & comparability
PAPTEX states its air permeability testing follows ISO 9237 at 100 Pa differential pressure in its evidence panel, while the individual model sheets transcribe values from reviewed technical recommendation sheets and do not repeat the test condition per row. The Longfeng page does not state a test condition.
- FSI values are the "Performance Metrics" figures printed on the source pages; the source does not publish their calculation method here.
- 2B3616 appears in both PAPTEX and Longfeng sheets with different weft density and permeability. Compare written specifications, not codes.
Public sources
- PAPTEX (paptexpmc.com)Model sheets explicitly state that values are transcribed from reviewed technical parameter sheets and require machine-condition confirmation.
- PAPTEX (paptexpmc.com)Model sheets explicitly state that values are transcribed from reviewed technical parameter sheets and require machine-condition confirmation.
- PAPTEX (paptexpmc.com)Model sheets explicitly state that values are transcribed from reviewed technical parameter sheets and require machine-condition confirmation.
- Longfeng Mesh (longfengwangye.com)
Accessed: 2026-11-09
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
BOM press felt structures (published layer table)
Press felts are commonly grouped by the number of base-mesh layers. GSM, permeability, tensile strength and line-load limits move together, so a felt should be matched to a defined press position.
| Base structure | GSM (g/m²) | Air permeability (CFM) | Tensile strength | Elongation | Line load | Max machine speed |
|---|---|---|---|---|---|---|
| Single layer BOM | 700–1200 | 30–120 | ≥2000 N/5cm | ≤1% | ≤80 kN/m | ≤800 m/min |
| Double layer BOM (1+1) | 950–1450 | 30–110 | ≥3000 N/5cm | ≤0.6% | 60–200 kN/m | ≤1000 m/min |
| Triple layer BOM (1+2 / 2+1 / 1+1+1) | 1450–1750 | 40–90 | ≥4500 N/5cm | ≤0.6% | ≥200 kN/m | ≤1000 m/min |
Test conditions & comparability
Supplier-published typical ranges; air-permeability test pressure is NOT stated. Press position, nip geometry, loading and current felt evidence must be reviewed before any of these values is used as a requirement.
- One published BOM 1+1 example lists 3.4 mm caliper, 75 CFM and 1250 g/m², which sits inside the double-layer ranges above.
- A Chinese industry directory lists a broader generic window of 800–2000 g/m², 2.5–5.0 mm and 50–300 CFM for press felts; it is a directory range, not a test result.
Public sources
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
Pulp washing and high-speed washing mesh examples
Washing mesh tables are usually keyed by mesh number, filament diameter, density and air permeability. The published list below is reproduced for the high-speed washing series only, where the columns align unambiguously.
| Mesh no. | Warp Ø (mm) | Weft Ø (mm) | Density (roots/cm) | Air permeability (m³/m²·h) |
|---|---|---|---|---|
| 2B3316-380 | 0.28 | 0.5 | 36 | 6000 |
| 2B4216-425 | 0.22 | 0.45 | 42 | 6800 |
| 2B5616-410 | 0.17 | 0.35 | 56 | 5500 |
| 2B6016-350 | 0.17 | 0.35 | 60 | 5000 |
Test conditions & comparability
The source list does not state the test pressure. Other columns on the same published list (weight, caliper, mesh count, aperture) are not aligned consistently in the HTML copy, so they are deliberately omitted rather than guessed.
- The same published list also shows a plain washing mesh 16304 at Ø0.25 / Ø0.30 and 17 roots/cm; its remaining columns are ambiguous and are omitted.
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
PET monofilament diameter / linear density reference
A monofilament is ordered by diameter, linear density, breaking force, elongation, shrinkage and tolerance. This table reproduces one published diameter series verbatim.
| Diameter (mm) | Linear density (D, as published) | Breaking force (≥ N) | Elongation at break (≤ %) | Heat shrinkage (≤ %) | Density (g/cm³) |
|---|---|---|---|---|---|
| 0.08 | 70 | 1.5 | 20 | 5 | 1.38 |
| 0.10 | 110 | 2.5 | 20 | 5 | 1.38 |
| 0.12 | 160 | 3.5 | 20 | 5 | 1.38 |
| 0.15 | 250 | 5 | 20 | 5 | 1.38 |
| 0.20 | 440 | 9 | 20 | 5 | 1.38 |
| 0.25 | 680 | 13 | 20 | 5 | 1.38 |
| 0.30 | 980 | 19 | 20 | 5 | 1.38 |
| 0.40 | 1740 | 32 | 20 | 5 | 1.38 |
| 0.50 | 2720 | 50 | 20 | 5 | 1.38 |
| 0.60 | 3920 | 70 | 20 | 5 | 1.38 |
| 0.80 | 6960 | 120 | 20 | 5 | 1.38 |
| 1.00 | 10880 | 180 | 20 | 5 | 1.38 |
Test conditions & comparability
The source states ≤20% elongation and ≤5% heat shrinkage as uniform maxima for the whole series, without a test temperature or duration. It does not publish a diameter tolerance per row.
- PAPTEX lists a 0.08–1.0 mm diameter range for its polyester monofilament product line; another supplier publishes a broader 0.045–1.00 mm range.
- Linear density is published here in denier (D); other suppliers use dtex. The two units are not interchangeable and no conversion is applied.
Public sources
- PET monofilament diameter / denier table
- PAPTEX (paptexpmc.com)Model sheets explicitly state that values are transcribed from reviewed technical parameter sheets and require machine-condition confirmation.
Accessed: 2026-11-09
Published PET monofilament property windows
For a quotation, the usable specification is a property window plus its test method — not a single diameter. These published windows show how wide the common ranges are.
| Property | Published range | Condition / unit note |
|---|---|---|
| Diameter | 0.045–1.00 mm | NTEC published range; PAPTEX product line: 0.08–1.0 mm |
| Linear density | 20–10850 dtex | dtex, not denier |
| Elongation at break | 15–45% | As published; no test method stated on this page |
| Strength at break | 3.7–5.3 cN/dtex | As published; not the same as breaking force in N |
| Dry heat shrinkage | 0.5–20% | At 180 °C, as published |
| Boiling water shrinkage | 1–8% | As published |
Test conditions & comparability
These are catalogue windows from a single supplier page, not acceptance limits. Diameter tolerance, polymer grade, hydrolysis resistance, colour and test method must be agreed in a written specification.
Public sources
- NTEC PET monofilament property ranges
- PAPTEX (paptexpmc.com)Model sheets explicitly state that values are transcribed from reviewed technical parameter sheets and require machine-condition confirmation.
Accessed: 2026-11-09
Nonwoven production forming mesh examples
Nonwoven forming belts are published under process-specific codes. The two examples below show how differently suppliers state air permeability — one with a pressure, one without.
| Code / process | Structure | Warp / weft density (roots/cm) | Yarn Ø (mm) | Thickness (mm) | Weight (g/m²) | Air permeability |
|---|---|---|---|---|---|---|
| CXW25408-165 | 1.5-layer forming mesh | 29.5–30.5 / 14.5–15.5 | Warp Ø0.24 PET; weft Ø0.45 PET / Ø0.47 PA | 0.99 | 470 | 6500 m³/m²·h at 100 Pa / 411.3 CFM at 125 Pa |
| WFB504 | White round-yarn mesh, spunbond / meltblown | 20.5 / 10.0–11.0 | Warp Ø0.50; weft Ø0.60 | 1.70 | 990 | 9000–12000 m³/m²·h |
Test conditions & comparability
CXW25408 explicitly states 100 Pa for the m³/m²·h value and 125 Pa for the CFM value. WFB504 states no test pressure. A second WFB504 page lists 9500 m³/m²·h, 1.68 mm and 1000 g/m² for the same code — another reason to confirm the written specification.
- The WFB504 source also lists heat-setting tension 60 N/cm, heat-setting temperature 180 °C, custom width < 5.5 m and length < 90 m, and endless / reverse-plug / spiral-ring seam options.
- Uniformity across the width matters as much as the average permeability value for nonwoven web formation.
Public sources
- Huading nonwoven forming mesh CXW25408
- Hengshun WFB504 nonwoven forming mesh
- Changda WFB504 nonwoven forming mesh
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.
Source index
All de-duplicated sources for the tables above, accessed 2026-11-09. Source pages may change; the original page governs the published values. No pricing, stock or commercial terms are reproduced here.
- Hehuang (forming-dryerfabrics.com)
- Hehuang (forming-dryerfabrics.com)
- Hehuang (forming-dryerfabrics.com)
- Hehuang (forming-dryerfabrics.com)
- PAPTEX (paptexpmc.com)
- PAPTEX GW22504K model page
- PAPTEX SJ16904 configurations
- Longfeng LF-22504 page
- PAPTEX (paptexpmc.com)
- PAPTEX (paptexpmc.com)
- PAPTEX (paptexpmc.com)
- Longfeng Mesh (longfengwangye.com)
- Leizhan spiral dryer screen parameter table
- polyestermesh.org spiral mesh table
- HUATAO spiral dryer screen table
- PFM Screen BOM press felt tables
- HUATAO press felt parameter table
- Aotian BOM 1+1 felt example
- Sludge dewatering belt parameter table (widely republished)
- Goepe reprint of the dewatering belt table
- Anping Xinha polyester mesh specification list
- Reking / plybelt square-hole mesh table
- PET monofilament diameter / denier table
- NTEC PET monofilament property ranges
- Huading nonwoven forming mesh CXW25408
- Hengshun WFB504 nonwoven forming mesh
- Changda WFB504 nonwoven forming mesh
Frequently asked questions
Are these Hengfeng product specifications?
No. Every value on this page is transcribed from a publicly published third-party supplier or competitor page on 9 November 2026, and each table carries its source URL and test conditions. They are industry-common reference values for a technical discussion, not Hengfeng measurements, not a Hengfeng product specification and not a supply commitment.
Can I compare CFM values from one table with another?
Only when the unit, differential pressure and test method are identical. Several source pages state no test pressure at all, and some publish CFM at 127 Pa alongside m3/m2h under an unstated condition. Values from different tables must not be ranked against each other.
Why do two suppliers publish different figures for the same model code?
Model codes such as 2B3616 or 22504 are widely used shorthand, not a controlled specification. Published density and permeability differ between supplier sheets. Always compare the written specification, including tolerance and test method, rather than the code.
How do I obtain a binding specification?
Send your machine position, paper grade and basis-weight range, speed, fabric dimensions, current construction and the issue to address. We review those conditions and issue a written specification with the agreed values and test methods; that document is the binding one.
Need a specification you can order against?
Public reference tables only align terminology and units. Send your machine position, paper grade, speed, dimensions and current fabric record, and we will review them and issue a written specification.
Send an enquiry