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Quarter-turn electric actuators are widely used in the field of automatic control within industrial sectors such as power, metallurgy, petroleum, and chemical engineering. To improve the reliability of electric actuators, it is necessary to minimize and eliminate faults as much as possible. Some faults in valve electric actuators can be resolved through adjustments, while others arise from prolonged use and reduced accuracy; in such cases, repairs or component replacements are required to restore their performance. There are also faults caused by inadequate design in the original version of the electric actuator, and improvements are needed to address these issues. Changhui Instruments yunrun.com.cn http://yunrun.com.cn/upload/202108/21/202108210135209470.png 1. Fault characteristics of angle-type electric actuators ① Faults during the commissioning phase: The fault issues with newly purchased electric actuators are quite complex, and they are caused by a combination of quality problems related to design, manufacturing, installation, and management on the part of the manufacturer of the electric actuators. ②Failures in the early and middle stages of operation: Valve electric actuators generally experience lower failure rates during the middle stage of operation, when the system components are in a better working condition. ③Faults in the later stages of operation: After an angle-of-rotation electric actuator has been in use for a period of time, various components suffer from excessive wear over time due to differences in operating frequency and load conditions. The fault characteristics of electric actuator models at this stage include poor position feedback, low positioning accuracy, decreased stability, significantly reduced efficiency, and an increasing failure rate. 2. Sporadic and sudden failures in angle-of-rotation electric actuators: Such sudden failures occur abruptly over time; the areas affected by the faults and their causes are relatively clear. They can be caused by both non-human and human factors, such as poor contact in position feedback devices, worn brake pads leading to locking, damaged components, burned-out coils, and failed seals. That’s all for the discussion on common faults and troubleshooting methods of angle-of-rotation electric actuators. Changhui Instruments hopes to help everyone make better use of these actuators.