MAINTENANCE TIME PREDICTING APPARATUS FLOW RATE CONTROLLING APPARATUS AND MAINTENANCE TIME PREDICTING METHOD

摘要

An object of the present invention is to predict a time when maintenance of a flow control device and its related equipment becomes necessary. The maintenance time predicting device includes a valve opening degree acquisition section (3) for acquiring an opening degree of the valve when the flow rate of the fluid is maintained at a predetermined target flow rate during flow rate control for controlling the flow rate of the fluid using a valve , A function approximating the relationship between the opening of the valve and the flow rate of the fluid, and a function of changing the flow rate of the fluid until the flow rate reaches a disengagement control state in which the flow rate of the fluid can not be maintained at the target flow rate, And an incapable control time estimating unit 4 for estimating a time.