Vertical travel speed: 0 to 250 mm/min Plates handles: from 1.40 to 3.20 meters height. Plates thickness: from 8 to 50 mm single side welding 32mm. Tank diameters: 5.00 meters and over Regulates welding current through the feedback of arc voltage, and it adjusts wire stick out and welding head auto lifting by welding current feedback. Applicable for í¦bottom to upí¦ constructed storage tanks,  inside/outside welding Suitable for tank diameter 5.00 m and over  adjustable wind shielding standard frame for tank shell plate 1.4 m to 3.2 m high Front and back side are forced together after water cooling. Fixed ceramic or water-cool cooper mat is applied at the back side, water-cool copper shoe is applied at the front side. It use 100% co2 gas shield and flux cored wire or intershield flux cored wire. Liquid surface of melting pool self-controllable, auto-traveling welding carriage and self-adjustable sitck out. 4feet