Research on Valve Disc Displacement Detection in Off-line Safety Valve Calibration
The determination of the valve disc displacement during offline calibration of safety valves enhances the precision of identifying valve opening,preventing the misinterpretation of leaks as openings.Through the integration of a laser displacement sensor and displacement targets into the digital pressure detection system for safety valve open-ing,an investigation was conducted into the measurement of valve disc displacement during safety valve offline cali-bration.The study yielded a method and applicable range for measuring valve disc displacement in safety valve cali-bration.Experimental results demonstrate that distinguishing between leaks and openings in full-lift safety valves can be achieved by monitoring the valve disc displacement.The findings provide technical support for accurately deter-mining safety valve openings.