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In the on-site use of regulating valves, many problems are often caused by the quality of the regulating valve itself, improper installation and use of the regulating valve, such as improper installation environment, improper installation position and direction, unclean pipelines, etc. When installing and using electric control valves, you should pay attention to the following aspects:: (1) The regulating valve is an on-site instrument and requires the ambient temperature to be in the range of -25 to 60°C and the relative humidity to be ≤95%. If it is installed in the open air or in high-temperature places, waterproofing and cooling measures should be taken. If there is a vibration source, stay away from the source or add anti-vibration measures. (2) The regulating valve should generally be installed vertically. It can be tilted under special circumstances. If the tilt angle is large and the weight of the valve itself is too large, the valve should be protected by supporting components. (3) When installing the regulating valve pipeline, generally do not leave it too high from the surface or board. When the pipeline height is greater than 2m, a platform should be installed as much as possible to facilitate the operation of the handwheel and facilitate maintenance. (4) Before installing the regulating valve, the pipeline should be cleaned to remove dirt and welding slag. After installation, in order to ensure that no impurities remain in the valve body, the valves should be cleaned again, that is, all valves should be opened when the medium is introduced to prevent impurities from getting stuck. After using the handwheel mechanism, it should be restored to its original neutral position. (5) To enable the production process to continue when the regulating valve fails or is repaired, a bypass pipeline should be added to the regulating valve. At the same time, special attention should be paid to whether the installation position of the regulating valve meets the process requirements. (6) The installation of the electrical part of the electric control valve should be carried out according to the construction requirements of relevant electrical equipment. If it is an explosion-proof product, it should be installed in accordance with the requirements of the "Installation Code for Electrical Equipment in Explosive Hazardous Locations". For example, the on-site conductor adopts SBH type or other six-core or eight-core rubber-mounted cables with an outer diameter of about Φ11.3 mm. During use and maintenance, it is strictly prohibited to power on, open the cover for maintenance and pry on the explosion-proof surface in explosive places. At the same time, do not knock or scratch the explosion-proof surface during disassembly and assembly, and restore it to the original explosion-proof required state after maintenance. (7) After the actuator reducer is disassembled and repaired, attention should be paid to oiling and lubrication. Low-speed motors generally do not need to be disassembled, cleaned and lubricated. After assembly, you should also check whether the valve position and valve position opening indication match.