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8 Malfunctions
8.1 Troubleshooting
Malfunction
Downstream pressure ex-
ceeds the adjusted set
point.
Downstream pressure
drops below the adjusted
set point.
EB 2626-1 EN
Possible reasons
Insufficient pressure pulses on the
operating bellows.
Foreign particles blocking the
plug
Seat and plug are worn or leak.
Pressure tapped at the wrong
place (regulator with external
control line)
Regulator or K
/C
coefficient
VS
V
too large
Operating bellows defective
Regulator installed against the
flow
Regulator or K
/C
coefficient
VS
V
too small
Pressure tapped at the wrong
place (regulator with external
control line)
Foreign particles blocking the
plug
Strainer blocked
Recommended action
Î Clean the borehole in the body.
Î Connect the control line on site for regulators with
external control line. Clean the control line and
screw fittings.
Î Remove foreign particles.
Î Replace damaged parts.
Î Contact SAMSON's After-sales Service.
Î Replace the damaged seat and plug.
Î Contact SAMSON's After-sales Service.
Î Reconnect the control line at another point.
Î Do not connect the control line at pipe bends or
necks.
Î Check the sizing.
Î Change K
/C
coefficient, if necessary or install
VS
V
a different sized regulator.
Î Contact SAMSON's After-sales Service.
Î Replace the damaged operating bellows.
Î Install the regulator so that the direction of flow
matches the direction indicated by the arrow on
the body.
Î Check the sizing.
Î Change K
/C
coefficient, if necessary or install
VS
V
a different sized regulator.
Î Contact SAMSON's After-sales Service.
Î Reconnect the control line at another point.
Î Do not connect the control line at pipe bends or
necks.
Î Remove foreign particles.
Î Replace damaged parts.
Î Contact SAMSON's After-sales Service.
Î Clean the strainer.
Malfunctions
8-1
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