Vacuum tube generator is the old generation, and has been eliminated in many industries. However, in some applications, especially those require operating frequency higher than 450 KHz, vacuum tube generator still earns its own place. To replace vacuum tube generator is a systematic project, because many aspects should be considered, such as induction heating process requirements, production rate, efficiency, security, cost, reliability, maintenance, etc. So, as long as the market demands, the products will be supplied.