Patent ID: 9037281
Filing Date: 2015-05-19
Classification: F16K,G05B,Y10T

Abstract:
1. A method for condition monitoring of a valve, the method comprising: collecting performance variable data representing an operation of a valve operating in an industrial process, collecting operating point variable data representing an operating point of the industrial process, generating, on the basis of said collected performance variable data and said collected operating point variable data, a statistical distribution representing a short-term behaviour of a given performance variable of the valve separately at a plurality of operating points of the industrial process, generating, on the basis of said collected performance variable data and said collected operating point variable data, a statistical reference distribution representing a long-term behaviour of a given performance variable of the valve separately at a plurality of operating points of the industrial process, analysing the present performance of the valve by comparing the short-term statistical distribution at different operating points with the long-term reference distributions of the corresponding operating points.