A tool for diagnosis in industrial valves based on ISA standards

This paper shows the implementation of a software of valves evaluation in accordance with ANSI/ISA specifications and the use of a model which simulates the static friction for validation. The assessment is generated from the execution of standardized tests. For this purpose, the software is able to generate input signals for each specific test considering user-defined parameters, allowing flexibility and execution of tests in different types and sizes of valves. The test results are displayed graphically by plotting the input signal and position of the valve stem as variables. The analysis of these data is done to extract the parameters that reflect the current state of each instrument. The results section at the end of the paper shows some screens running tests where such information can be extracted.