What machine positions is SJ22804 listed for?
The supplied application notes list Dryer positions for grades with specific sheet-surface requirements. Final suitability depends on the actual machine position and operating conditions.
Flat Yarn Dryer Mesh
SJ22804 Double-Layer Flat Yarn Dryer Mesh — A position-matched dryer-section fabric
SJ22804 is listed as a double layer double-layer flat yarn dryer mesh, in the Flat Yarn Dryer Mesh family. Its construction and the dimensional values below are transcribed from the supplied product schedule. The listed air-permeability window is (90-300 CFM) and is configurable for the machine position. The application notes identify dryer positions for grades with specific sheet-surface requirements. Review the forming or dryer-section layout, furnish, seam and operating conditions before specifying.
Get a QuoteKey Features
- The double-layer structure provides a smooth contact face.
- The supplied description positions this construction for paper grades with particular surface requirements.
- Confirm permeability and seam details against the dryer group and current machine configuration.
- Selection check: confirm the permeability target and test basis for the exact machine position.
Technical Specifications
| Structure | Double layer |
|---|---|
| Pattern | Flat warp 0.30 x 0.78 mm; weft 0.80/0.60 mm |
| Warp Density | 22 /cm |
| Weft Density | 8.5 /cm |
| Yarn Diameter | Flat warp 0.30 x 0.78 mm; weft 0.80/0.60 mm |
| Caliper | 1.45 mm |
| Air Permeability | 90-300 CFM (configurable) |
Only values present in the supplied schedule are shown. Tolerances and final supply specifications require confirmation.
Applications
The supplied schedule lists dryer positions for grades with specific sheet-surface requirements. For a dryer fabric, the position within a multi-cylinder dryer section matters because speed, contact conditions, sheet support and the desired air-flow window vary along the machine. For a forming fabric, the furnish, drainage demand, retention objectives and required sheet-side support should be reviewed together. The grade name alone is not enough to choose a construction.
Use the stated structure and yarn layout to shortlist the model, then compare it with the current fabric and the exact machine position. The available product information does not specify a guaranteed production result, service life or energy saving. Those outcomes depend on the operating system and must be assessed from the mill's own run data.
If this model is being considered as a replacement, share the paper grade, target basis weight, machine speed, fabric width, loop length, seam type and current permeability or forming data. The technical team can then verify whether the supplied schedule is appropriate or whether a position-specific variation should be discussed.
Selection Notes
Air permeability should be selected for the machine position, not from a generic product label. Where the schedule lists a range, the final target is configurable and must be confirmed against operating conditions. Where no value is listed, request the value for the proposed construction rather than inferring it from another model.
For an actionable quotation, provide machine speed, paper grade and basis weight, fabric width, loop length, current fabric model or construction, current air-permeability or drainage data, seam arrangement and machine position. Include any observed operating issue only if you have measured or documented it. This helps distinguish a construction change from a dimension or seam replacement.
Frequently Asked Questions
Is the air permeability fixed for SJ22804?
No single value should be assumed. The supplied schedule gives 90-300 as a configurable range; confirm the target for the exact position.
What information is needed for a quotation for SJ22804?
Provide paper-machine speed, paper grade and basis weight, fabric width, loop length, current-fabric details, seam requirement and the intended machine position. Values not included in the supplied schedule must be confirmed before ordering.
Can the listed specifications be changed?
Some constructions and permeability targets may be configurable, but the available design range depends on the machine and position. Treat the listed dimensions as the supplied reference and request written confirmation for the quotation configuration.
Related Models
Technical Reading
For a construction review, send the machine speed, grade and basis weight, width, loop length and current fabric information with your request.