Water Heater Seam Welding Machine,The aircraft uses a computer pulse, pressure, frequency welding technology.It is welding machine with spot welding,central welding and seam welding a part. Technology is advanced. The welding crack is solid with beautiful forming.The machine uses intelligent computer control and the latest international digital control circuit.There is a frequency pulse function with the machine,which is mainly used in the solar water heater tank welding.It is a multi-function welder of tank welding,which can weld wang longitudinal crack of the tanks and spot weld.The machine can control the welding time accurately.The color of the welding point isnt changed while welding the materials.The welding point is beautiful, The gastightness is ideal. It extends the life of the tank. The welding efficiency is higher 5-10 times than the ordinary welder efficiency.