Samson 2413 Series - Page 46

46 EB 2517 EN
Malfunctions
Table9: Troubleshooting
Malfunction Possible reasons Recommended action
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 depart-
ment.
Slow control response
Control line or restriction blocked by
dirtcausingtheowthroughittobe
restricted.
Î Clean the control line.
Î Clean the restriction.
Upstream pressure
uctuates
Regulator or K
VS
/C
V
coefcienttoo
large
Î Checkthesizing.
Î Change K
VS
/C
V
coefcient,ifnecessaryorin-
stalladifferentsizedregulator.
Î Contact SAMSON's After-sales Service depart-
ment.
Pressure tapped at the wrong place
(regulatorwithexternalcontrolline).
Î Reconnect the control line at another point.
Î Do not connect the control line at pipe bends or
necks.
The restriction in the control line for
pressure tapping is too small or miss-
ing.
Î Install a restriction.
Loud noises Highowvelocity,cavitation.
Î Checkthesizing.
Î Install larger regulator, if necessary.
Leakage at the
actuator.
Defective operating diaphragm/
bellows.
Î Replace damaged diaphragm/bellows.
Leakage at the bellows
extension.
Defective bellows seal
Î Replace bellows seal.
Î Contact SAMSON's After-sales Service depart-
ment.
Red mark appears at
the diaphragm rupture
indicator (actuator
with two diaphragms).
Defective operating diaphragm Î Replace damaged operating diaphragm.