Such types of spiral dryer fabrics for belt press filter are stuffed with filler mono-filaments in the spiral loops to reduce the permeability. These spiral fabrics are widely used for sludge or sewage dewatering in many industries such as paper mills, effluent treatment plants, mining and mineral industry.

Polyester spiral press filter belt is also a monofilament polyester fabric but not like a woven fabric, instead this is a polyester fabric with spiral twisted wires where pins hold the spirals together like a chain.

Most of the polyester spiral press filter belt is being used within the dewatering industry to separate sludge from water within filter belt presses. Polyester spiral fabric belts are also being used within the food industry to dry fatty milk and whey powders on, or to separate solids from liquids. Other applications and industries are chemicals, pharmaceutical, coals washing and paper pulp washing. The polyester spiral fabric can be equipped with or without filling yarns which enables to adjust and customize the air and liquid permeability.

Specifications:

Air Permeability is tested at 127Pa. Water Permeability is tested at 1200Pa.
Warp yarn Weft yarn Air permeability Water permeability Thickness Tensile Strength Weight
0.6/PET 0.8/PET+φ0.7*2 630~670 CFM 380~400 L/m2.s 2.01 mm 1100 N/cm 1313 g/m2
0.68/PET 0.9/PET+φ0.7*2 765~825 CFM 400~420 L/m2.s 2.45 mm 1600 N/cm 1507 g/m2
0.68/PET 0.9/PET+φ0.7*3 710~760 CFM 370~390 L/m2.s 2.45 mm 1600 N/cm 1561 g/m2
0.68/PET 0.9/PET+φ0.7*4 490~530 CFM 280~300 L/m2.s 2.45 mm 1600 N/cm 1661 g/m2
0.68/PET 0.9/PET+φ0.6*5 335~375 CFM 210~230 L/m2.s 2.45 mm 1600 N/cm 1654 g/m2
0.68/PET 0.9/PET+0.65*1.6 730~780 CFM 400~420 L/m2.s 2.45 mm 1600 N/cm 1521 g/m2
0.68/PET 0.9/PET+0.65*2.0 620~660 CFM 340~360 L/m2.s 2.45 mm 1600 N/cm 1569 g/m2
0.68/PET 0.9/PET+0.70*2.2 590~630 CFM 320~340 L/m2.s 2.45 mm 1600 N/cm 1634 g/m2
0.68/PET 0.9/PET+0.70*2.3 580~620 CFM 310~330 L/m2.s 2.45 mm 1600 N/cm 1661 g/m2
0.68/PET 0.9/PET+0.47*2.7 440~470 CFM 210~230 L/m2.s 2.45 mm 1600 N/cm 1558 g/m2
0.9/PET 0.9/PET 935~975 CFM 500~520 L/m2.s 2.73 mm 1600 N/cm 1563 g/m2
0.9/PET 0.9/PET+φ0.80*3 500~540 CFM 300~320 L/m2.s 2.73 mm 1600 N/cm 1938 g/m2
0.9/PET 1.05/PET+φ0.90*3 730~770 CFM 390~410 L/m2.s 2.92 mm 1800 N/cm 1947 g/m2
0.9/PET 1.05/PET+φ0.90*4 490~510 CFM 260~280 L/m2.s 2.92 mm 1800 N/cm 2073 g/m2
0.9/PET 1.05/PET+φ0.80*5 415~455 CFM 215~235 L/m2.s 2.92 mm 1800 N/cm 2053 g/m2
0.9/PET 1.05/PET+0.65*2.0 730~770 CFM 390~410 L/m2.s 2.92 mm 1800 N/cm 1808 g/m2
0.9/PET 1.05/PET+0.70*2.3 680~720 CFM 340~360 L/m2.s 2.92 mm 1800 N/cm 1880 g/m2