This product adopts improved constitution and effective materials, with appropriate temperature management and extensive adjustment range. It may give diverse temperature leadership level collection merchandise in step with person requirements, which provides convenience for person product design. The product overcomes the issues of volatile management accuracy, temperature drift, quick life, aging, and fracture after multi-frequency operation caused by different structural kinds of thermostats in extreme temperature and excessive humidity environments. It is particularly used for fuel fryer temperature control. temperature control valve, gasoline oven temperature leadership valve, etc.