Standard Valve Diagnostic Test
To perform the standard valve diagnostic test, type a speed between 1 and 10 in the “speed” box and
click the Standard button. This procedure strokes the valve over its full range and should not be run
with the valve in service and the process running.
A speed between 1 and 10 must be entered. This determines the speed at which the valve will travel
during the travel vs. pressure test points. A speed of 1 or 2 is appropriate for valves with small actua-
tors. A speed of 3 or 4 is appropriate for valves with medium actuators. Higher speeds will be required
for larger actuators. During the test, if the valve moves too slowly or stops moving completely, stop the
procedure and restart it with a higher speed number. The speed number is approximately associated
with the size of the valve. For example, enter a speed of 2 for a 2-inch size valve.
When the test is finished, maximum friction, the computed spring range, minimum and maximum output
pressures, and stroking times are displayed in the Diagnostic Data box at the lower right of the window.
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Standard valve diagnostic strokes the valve over its
full range. Isolate the valve from the process prior
to running standard diagnostic.
WARNING
Figure 43. Diagnostics Window
