LGK-60S / LGK-70S Air Plasma Cutting Machine Models covered: LGK-60S | LGK-70S — Dual voltage, built-in air pump Key Features IGBT inverter technology for reliable, efficient performance. Built-in air pump — no external air supply required. Wide voltage input with automatic 220V / 380V changeover. Non-contact high-frequency pilot arc ignition: high success rate with low interference. Automatic under-voltage, over-voltage and over-heating protection. Patented air-path cooling