Straight Seam Welding Machine,ZF-200 Longitudinal seam weldert is specialized designed for thin wall,cuboids and flat work piece welding machine with matching weld electric power source,shielded carbon arc welding ) which can weld of produces,such as stainless steel,mild steel,alloy steel,copper and so on.Main technology parameter Model NO. ZF-200 ZF-300 ZF-500 ZF-1000 ZF-2000 The valid length of welding 200mm 300mm 500mm 1000mm 1200mm The thickness of welding (mm) 0.3-2.0 0.3-2.5 0.5-3.0 0.8-3.5 1.0-6.0 The Min.cylinder diameter of welding Negotiable The speed of welding(mm/min) 600-1500 600-1500 600-1500 600-1500 600-1500 Work voltage 220V 220V/380V 220V/380V 220V/380V 220V/380V .