30
EB 2546-1 EN
Malfunctions
Table 4:
Troubleshooting
Malfunction
Possible reasons
Recommended action
Downstream pressure
drops below the adjusted
set point.
Insufficient pressure pulses on the
operating diaphragm.
Î
Clean the control line and screw fittings.
Î
Draw up an energy balance.
Regulator installed against the
flow.
Î
Install the regulator so that the direction of flow
matches the direction indicated by the arrow on
the body.
Regulator or K
VS
/C
V
coefficient
too small
Î
Check the sizing.
Î
Change K
VS
/C
V
coefficient, if necessary or install
a different sized regulator.
Foreign particles blocking the
plug
Î
Remove foreign particles.
Î
Replace damaged parts.
Î
Contact SAMSON's After-sales Service.
Safety device, e.g. pressure
limiter, has been triggered
Î
Check plant. Unlock safety device.
Strainer blocked.
Î
Clean strainer.
Downstream pressure
exceeds the adjusted set
point.
Foreign particles blocking the
plug
Î
Remove foreign particles.
Î
Replace damaged parts.
Î
Contact SAMSON's After-sales Service.
Seat and plug are worn or leak.
Î
Clean the seat and plug.
Î
Replace the damaged seat and plug.
Î
Contact SAMSON's After-sales Service.
Regulator or K
VS
/C
V
coefficient
too large
Î
Check the sizing.
Î
Change K
VS
/C
V
coefficient, if necessary or install
a different sized regulator.
Control line blocked
Î
Clean the control line and screw fittings.
Jerky control
response
Increased friction, e.g. due to
foreign particles between seat
and plug or in the stem guide on
the bonnet.
Î
Remove foreign particles.
Î
Replace damaged parts.
Î
Contact SAMSON's After-sales Service.
Slow control response
Control line blocked by dirt
causing the flow through it to be
restricted.
Î
Clean the control line.
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