38
EB 3131 EN
Malfunctions
Malfunction
Possible reasons
Recommended action
Control loop hunts.
Regulator or K
VS
/C
V
coefficient too
large
Î
Check the sizing.
Î
Change K
VS
/C
V
coefficient, if necessary or in
-
stall a different sized regulator.
Î
Contact SAMSON's After-sales Service.
The restriction in the control line for
pressure tapping is too large or miss-
ing.
Î
Install a restriction.
Î
Install a smaller restriction.
Slow control
response
Restriction in the screw joint of the ac-
tuator dirty or too small.
Î
Clean screw joint or install larger screw joint.
Dirt in the control line.
Î
Clean the control line.
Jerky control
response
Increased friction, e.g. due to foreign
particles between seat and plug.
Î
Remove foreign particles.
Î
Replace damaged parts.
Î
Contact SAMSON's After-sales Service.
Loud noises
High flow velocity, cavitation.
Î
Check the sizing.
Î
Install larger regulator, if necessary.
Leakage at the actua
-
tor
Defective operating diaphragm
Î
Replace damaged diaphragm.
Contact SAMSON's After-sales Service for malfunctions not listed in the table and when the
malfunction cannot be remedied as described.
Note