Automatic Dust Filter Bag Sewing Production Line includes following 5 parts ... Part 5. Control Unit Application: For sewing tube dust filter bag Widely used for woven and non-woven fabric, ... felt, meta-aramid felt, PPS felt, PTFE, polyester felt filter bag, etc. Main Charaters: a. High efficiency. The ... sewing speed can be 9 meters/minuter, suitable for bags with diamater of 120-300mm. b. Low failure rate ...