Recently, a fault occurred in a pneumatic control valve at an industrial production site, where small signals were difficult to actuate, affecting the precise regulation of process parameters. Upon receiving the report, the technical team responded quickly and conducted a special investigation.
Upon inspection, the malfunction was primarily attributed to three factors: firstly, the valve core experienced jamming due to the deposition of impurities in the medium; secondly, there was a slight blockage in the air supply pipeline, leading to unstable pressure; and thirdly, there was a drift in the parameters of the positioner. Following the principle of "troubleshooting external links before dismantling internal components", the team sequentially cleaned the gap between the valve core and the valve seat, cleared the air supply filtration device, recalibrated the positioner parameters, and simultaneously optimized the packing compression force to avoid excessive friction.
Currently, the faulty valve has returned to normal operation, and the small signal response sensitivity meets the standard. To prevent similar issues in the future, routine maintenance of the equipment will be strengthened, including regular cleaning of impurities from the air source, calibration of the positioner, and optimization of the medium filtration process, to ensure the stability and reliability of the production control system.
