by John Whaley , Vice President - Key Filters
Automatic, ribbon-style continuous belt screen changers used in plastics extrusion require long filter belts that pass through the filter chamber. These belts are made up of high-tensile, stainless steel wire woven into a mesh. While it may be tempting to use lower-priced, plain-weave wire cloth filters, the reality is that these lack strength and can fail over time. The better bet? Consider using a reverse Dutch twill weave (RDW) filter belt, which is specially engineered to provide added strength and durability required for continuous belt screen changer operation.
What Exactly is RDW?
RDW is a blend of twill weaving and Dutch weaving:
RDW technology also accommodates an ultra-fine mesh filtering cloth that’s ideal for liquid applications. RDW filter belts replace conventional extruder screen packs and can last for many months of nonstop operation, making them a reliable and cost effective choice. They’re available in roll form in custom or standard lengths—and just one belt is equivalent to several hundred screen packs.
The bottom line? The type of weave used in your filter belt matters. And the extra cost of an RDW belt is well worth the added reliability and peace of mind.
Parkinson Technologies offers a large inventory of standard meshes and sizes for high tensile RDW filter belts. Learn more.