Azbil’s Smart Valve Positioner 700 Series includes diagnostic functions for monitoring the control valve for safety operations. The control valve diagnostic capability of the FOUNDATION fieldbus model, with the latest ITK 6.1 registration, ensures safe plant operations by providing early detection of control valve abnormalities, allowing optimum control valve maintenance scheduling. It fully complies with the Fieldbus Foundation technical specifications.
The Smart Valve Positioner 700 Series detects abnormalities in shut-off, the actuator spring and the gland packing friction by measuring output pressure with a dedicated pressure sensor. It detects the stick-slip movement of the control valve quantitatively using the stick slip diagnostic algorithm. The "stick slip" is a valve’s unstable state caused by excessive friction.
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