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SHD series of intelligent non-invasive electric actuator, is the introduction of the latest international control technology, based on the development of a new generation of products. The product set absolute encoder technology, sensor technology, bus control technology, infrared remote control technology, liquid crystal display, magnetic switch and other latest automatic control technology and advanced manufacturing technology as one of the intelligent products. Its mechanical type electric actuator is a derivative product of intelligent non-invasive electric actuator. It absorbs the advanced concept of intelligent product design. It has the characteristics of small size, light weight, wide torque range and high explosion protection grade. The product is a device that controls the operation of the final control element (eg valve) in the open-loop control system, ie the product that meets the valve switch requirements. According to the working environment can be divided into ordinary products and explosion-proof products two series. Performance indicators were achieved JB / T8528-97 "ordinary valve electric device technical conditions" and JB / T8529-97 "flameproof valve electric device technical conditions.