... cloth 2.Auto function Water proofing and roofing welder, PVC Roofing welding machine,Plastic welding machine(PVC,TPO ,EVA membrane) Description:This welding machine can add weight additional based ... : 25m3/h Air pressure: 3000Pa Welding speed: 1-15m/min Welding width: 40mm Water proofing and roofing welder, PVC Roofing welding machine,Plastic welding machine(PVC,TPO ,EVA membrane)