... welding machine 20 years production experience TIG welding PLC control,operates simply KHBL8-80 tube to tube sheet heat exchanger automatic pulse TIG argon arc welding ... , easy to operate Panasonic IGBT inverter control dc pulse power, high efficiency, welding arc strong stabilityWater-cooling systems, ... 60HZ Rated load sustained rate 60% Rated welding voltage TIG welding ,22.6V Rated voltage no-load ...