Type Designations
Material Specifications and Quality Control
Applications of Screens and Belts
- Spiral Screens/Belts with seam
- Standard spirals
- Filled, low-permeability spirals
- Woven Screens/Belts with woven-in-seam
- Compound Screen belts with needled felt layers
Spiral Screens and Belts are formed by connecting large numbers of rows of zipper-type spirals with pintle wires to achieve a smooth, seamless filter or conveying surface. Their advantage lies in the lack of a separate seam area, making for smooth running and quick installation. A firm plastic edge coating serves to provide a precise controlling surface to allow for stable running control.
Woven Screens and Belts are produced from various combinations of polyester or polyamide monofilaments. They are made endless in the machine by closure of special woven-in loop or spiral pin seams. The permeability ranges from 100 cfm to over 1000 cfm.
Compound Screens and Belts are used for processes requiring high strength base woven or spiral foundations, overlaid with one or more layers of polyamide or polyester felts, needled firmly into the base foundation. Common uses include production of cement/gypsum/ceiling tile products and recovery of fine fibers, such as in food or paper production.