Flowserve ValveSight Diagnostics - Manual (Page 17)

ValveSight Diagnostics for HART User Manual FCD VSENSF0001-02-AQ 03/15
17 flowserve.com
6.1 Valve Health
This screen shows the indicators of Valve Health. For each indicator, key parameters are shown including alarm limits.
The user-adjustable alarm limits can be changed here. Clicking on the
Implications and Possible Solutions button dis-
plays a detailed description about what the indicator means and how it works. Also displayed are suggestions for making
repairs. This page is only available with the Advanced DTM and a positioner that has been upgraded with Pro diagnostics.
Friction
The friction of the valve/actuator assembly is displayed here as indicated on the graph hand in the “Nominal Value” and
“Current Value” display boxes. The Current Value is the most recently calculated friction value. A newly calculated friction
value requires that the valve moves a small amount, typical in normal operation. The Nominal Value is the value stored in
memory on the positioner and is updated every 10 minutes.
To view more information about what low or high friction can mean, click the Implications and Possible Solutions button.