As the fast developing of chemical industry, there are many kinds of rubber product with similar producing process, mainly including: raw material preparing, Plastic refining, mixing, calendering, forming, vulcanizing etc., and most of these sections needs steam. Besides, some high temperature machines such as pressing, kneading, banbury machines, vulcanization molding, injection molding machine, cement mixer, conveyor belt dryer and molds heating and insulation also need thermal oil heater.