Maintenance judgment index estimation device, flow control device and maintenance judgment index estimation method

摘要

The invention provides an apparatus for inferring a maintenance assessment indicator, a flow control apparatus and a method for inferring a maintenance assessment indicator. In the operation of the device, an inference is made to determine whether the flow control apparatus and its related equipment need maintenance. The apparatus for inferring the maintenance assessment indicator includes a valveopening acquiring unit (3) configured to acquire a valve opening when the flow of the fluid in flow control with a valve for controlling the flow of the fluid is maintained at a predetermined targetflow ; an opening estimation unit (4) configured to infer the flow upper limit value as a maintenance assessment indicator of the flow control apparatus in a case that the valve opening at the acquirement time is assumed to reach the upper limit based on a function obtained by approximating the relationship between the valve opening and the flow of the fluid and the valve opening obtained by the valve opening acquiring unit (3).