Malfunctions; Troubleshooting - Samson 3241-1-Gas Mounting And Operating Instructions

8 Malfunctions

Depending on the operating conditions, check the valve at certain intervals to prevent a pos‑
sible failure before it can occur. Operators are responsible for drawing up an inspection and
test plan.
Tip
SAMSON's After‑sales Service can support you in drawing up an inspection and test plan
for your plant.

8.1 Troubleshooting

Malfunction
Actuator or plug stem does not
move on demand.
Actuator or plug stem does not
move through the whole range.
The valve leaks to the atmo‑
sphere (fugitive emissions).
Increased flow through closed
valve (seat leakage).
Reduced flow rate
EB 8020-1 EN
Possible reasons
Actuator is blocked.
Signal pressure too low
Signal pressure too low
The packing and metal bellows
are defective.
Metal bellows is defective.
Flange joint loose or gasket
worn out.
Dirt or other foreign particles de‑
posited between the seat and
plug.
Valve trim is worn out.
Strainer blocked
Malfunctions
Recommended action
Check attachment.
Unblock the actuator.
Check the signal pressure.
Check the signal pressure line for
leakage.
Check the signal pressure.
Check the signal pressure line for
leakage.
Contact SAMSON's After‑sales
Service.
Contact SAMSON's After‑sales
Service.
Check the flange joint.
Replace gasket at the flanged
joint (see section 7.1 or contact
SAMSON's After‑sales Service).
Shut off the section of the pipe‑
line and flush the valve.
Contact SAMSON's After‑sales
Service.
Clean strainer. See associated
device documentation.
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