Samson 42-36 E Mounting And Operating Instructions page 60

Malfunctions
Malfunction
Flow set point not
reached.
Flow rate fluctuates
Slow control
response
Jerky control
response
Loud noises
Leakage at the
actuator
Note
Contact SAMSON's After-sales Service for malfunctions not listed in the table.
8-2
Possible reasons
Control line blocked
Strainer blocked
Regulator or K /C coefficient too
VS V
large
The restriction in the control line for
pressure tapping is too large or
missing.
Restriction in the screw joint of the
actuator 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 Clean the control line and screw fittings.
Î Clean the strainer.
Î Check the sizing.
Î Change K /C coefficient, if necessary or
VS V
install 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 3018 EN