| 摘要 |
[Problem] To achieve stable fluid control by suppressing occurrence of overshooting, hunting, and fluctuation of the valve opening even when the ambient temperature greatly changes. [Means for Resolution] A first table TA for defining the relationship between the sliding resistance index µk of a gland packing and the ambient temperature for each type of the gland packing is provided. A second table TB for defining control parameters corresponding to hysteresis levels (HYS) for each size of the setting/operating device is provided. By repeating, at regular intervals, the acquisition of the sliding resistance index µk at present corresponding to the ambient temperature TR at present and the type of a gland packing from the first table TA and the selection of the control parameter corresponding to the size of the setting/operating device and the hysteresis level (HYS) obtained from the sliding resistance index µk at present from the second table TB, the valve opening of the regulating valve is controlled using the selected control parameter. |
