34
EB 3135-2 EN
Malfunctions
Table 5:
Troubleshooting
Malfunction
Possible reasons
Recommended action
Flow rate exceeds adjusted set
point
Leak between seat and plug
Remove regulator from the
pipeline and clean the valve
seat and plug. Contact
SAMSON for further action.
Defective operating diaphragm
Contact SAMSON's After-sales
Service.
Control line with needle valve
blocked.
Remove control line and needle
valve. Clean them.
Valve too large for control task
(flow rate) or too small
(differential pressure)
Recalculate K
VS
and contact
SAMSON for further action.
Flow set point not reached.
Leak between seat and plug
Remove regulator from the
pipeline and clean the valve
seat and plug. Contact
SAMSON for further action.
Incorrect set point range
selected.
Check set point range and
contact SAMSON for further
action.
Safety device, e.g. pressure
limiter, has been triggered.
Check plant. Unlock safety
device.
Plant differential pressure too
low.
Compare differential pressure in
the plant with the plant’s drag.
Strainer blocked
Drain and clean filter of the
strainer.
Incorrectly installed valve
(direction of flow).
Install the regulator in such a
way that the flow of direction
corresponds with the direction
indicated by the arrow on the
valve body.
Control loop hunts.
Valve too large for control task
Recalculate K
VS
and contact
SAMSON for further action.
Contact SAMSON's After-sales Service for malfunctions not listed in the table and when the
malfunction cannot be remedied as described.
Note
Summary of Contents for 2489/58 Series
Page 39: ...EB 3135 2 EN 39 Certificates 1...
Page 43: ...EB 3135 2 EN 43 Certificates 3...
