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The advantage of the valve positioner is also reflected in improving system stability. Due to problems such as hysteresis and dead zones in traditional valves, it is easy to cause oscillation or inaccurate adjustment of the control system. However, the positioner effectively reduces these adverse factors through rapid response and precise adjustment. In addition, it extends valve life and reduces maintenance costs because the positioner avoids wear on the valve actuator caused by frequent overloads or inaccurate positioning.
In terms of industry standards, valve positioners must comply with international standards such as IEC 60534-4 to ensure that they meet requirements in terms of electromagnetic compatibility, protection level, and environmental adaptability. For example, explosion-proof positioners need to be ATEX or IECEx certified to be suitable for flammable and explosive environments.
When selecting a valve positioner, you need to consider the control signal type (such as pneumatic, electric), output force range, installation method (such as direct action, reaction) and whether it has intelligent functions (such as self-diagnosis, bus communication). The intelligent positioner can realize remote monitoring and parameter adjustment through digital communication technology, further improving the intelligence level of the control system.
