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Start up
Fig. 17: Tapping the valve set disc
8.2 Calibrate the stroke control drive (Option)
38
Eliminating suction problems (only for single ball valves with
PTFE ball seat)
For suction problems occurring during start up:
Exclude the possibility that there are foreign bodies in
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the valve.
Place the valve on a stable surface.
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Using a hammer (1) and a brass bar (2), gently tap the
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PTFE ball seat above the valve ball - see figure below.
Then with the valve in a damp condition allow it to prime.
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The stroke control drive is calibrated to the ordered dosing rate ex-factory.
In event that you want the stroke control drive to be calibrated to another
dosing rate, please contact ProMinent.
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