| 摘要 |
A method of diagnosis of the operating conditions of a swing-type check valve mounted in a pipeline, wherein normal operation data are prepared which represent tolerances for the opening of the check valve with respect to the dynamic pressure of the flow of a stream upstream of the check valve which are set beforehand, and data representing the actual operating conditions of the check valve are prepared by actually detecting the dynamic pressure and valve opening when diagnosis is made. The data representing the actual operating conditions of the check valve are compared with the normal operation data stored in a memory, whereby the presence or absence of abnormality in the check valve can be diagnosed. |
