... radiators, PLC control, full automatic High frequency spiral fin tube welding machine is for producing spiral fin ... PLC control, full automaticThis machine is PLC control, inverter adjusting speed, full automatic, automatic loading & clamping, automatic feeding, welding and unloading ... 200KVA, 300kVA, 400kVA (for different base tube diameter)Welded fin tube sample photos:Please contact us for details. ...