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Hi, it’s still me, the Industrial Control Assistant. I chose this name because it’s pretty cool! Okay! Listen! (Actually, it was the manager who asked for it); it shows what my responsibilities are. Obviously, I am a butler. I update small tips on industrial control every day. Of course, I have more than just this one function... Want to know what other functions there are? Well, let me tell you: Valve positioners are being used more and more often, but some of them operate under difficult conditions; moreover, incorrect operations by non-professionals can shorten their lifespan. While some people can use a valve positioner for 5 years, others may only be able to use it for 5 months. At this point, it is necessary to know how to protect the valve positioner in order to maintain its lifespan. Next, we will analyze it in four points. 1. During transportation and operation: In this process, valve positioners are susceptible to strong external vibrations and shocks, and we should try our best to avoid these external factors that can cause vibrations. 2. Anti-condensation measures: If the valve actuator remains unused in the workplace for an extended period of time, cover it with a sleeve to prevent rainwater from entering the actuator. If the operating environment is hot and humid, measures should be taken to prevent condensation from forming inside the locator. The product must be kept from condensing until it is shipped out. 3. Temperature conditions: If the valve actuator is used at temperatures outside the specified range, the sealing materials will degrade rapidly, preventing the actuator from functioning properly; therefore, it must be used within the specified temperature range. 4. Cleaning: Use clean gas to thoroughly remove moisture and dust from the valve positioner. Implementing protection measures in these four areas not only ensures the proper operation of valve positioners, but also extends their service life and improves their measurement accuracy. However, after being used for a while, valve positioners may develop some problems, such as abnormal output pressure. Since we spent so much money on them, we can’t just throw them away, right? So we need to check whether they can still be repaired and used. 1. The output pressure of the intelligent valve positioner is slow or abnormal. During normal production operations, the continuous operation of control valves can cause damage to their diaphragm heads and lead to air leakage, resulting in a situation where a signal is present but the valve responds slowly. This prevents the valve from functioning as intended for timely regulation. The solution is to inspect the diaphragm chamber and replace the diaphragm. 2. If the intelligent valve positioner receives an input signal but the control valve does not move, it is usually due to a malfunction in the electromagnet assembly or an incorrect air supply pressure; it is recommended to replace the electromagnet assembly or check the air pressure. 3. The intelligent valve positioner does not output pressure. The reason is dust in the air; impurities are not thoroughly filtered, which leads to the blockage of the throttle hole. It could also be due to an incorrect position of the nozzle flap, or defects in the actuator. Solutions include using 0.2mm wire to clear the throttle hole and replacing the actuator. Yes, I have many more features, but I don’t want to talk about them today (because no one asked, cry cry). Anyway, I’ll still keep updating them, whether you want to see them or not. Hehe