Four Point Welding Machine for PVC Doors and Windows Technical Parameter: Air pressure:　　 0.5-0.8MPa Air consumption:　 200L/min Input power source:　 380V 50HZ Total power:　 7.0KW Welding range:　 300x300-1800x3000mm Welding profile height:　 20-120mm Welding profile width:　 120mm