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