Samson 2417 Series Mounting And Operating Instructions page 45

Table 9: Troubleshooting
Malfunction
Upstream pressure
exceeds the adjusted
set point.
Pressure drops below
the adjusted set point.
EB 2517 EN
Possible reasons
Insufficient pressure pulses on the
operating diaphragm.
Pressure tapped at the wrong place
(regulator with external control line).
Regulator installed against the flow.
Regulator or K /C coefficient too
VS V
small
Foreign particles blocking the plug
Compensation chamber in the wrong
position or too small (with steam).
Defective operating diaphragm
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 too
VS V
large
Control line blocked
Strainer blocked.
Recommended action
Î Connect the control line on site for regulators
with external control line.
Î Clean the control line and screw fittings.
Î Reconnect the control line at another point.
Î Do not connect the control line at pipe bends or
necks.
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 in-
VS V
stall a different sized regulator.
Î Contact SAMSON's After-sales Service depart-
ment.
Î Remove foreign particles.
Î Replace damaged parts.
Î Contact SAMSON's After-sales Service depart-
ment.
Î Reconnect compensation chamber at a different
place or replace it (see section 7.7).
Î Replace damaged diaphragm.
Î Remove foreign particles.
Î Replace damaged parts.
Î Contact SAMSON's After-sales Service depart-
ment.
Î Replace the damaged seat and plug.
Î Contact SAMSON's After-sales Service depart-
ment.
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
VS V
install a different sized regulator.
Î Contact SAMSON's After-sales Service depart-
ment.
Î Clean the control line and screw fittings.
Î Clean strainer.
Malfunctions
45