13 Fault removal ARCA Regler GmbH
26 / 28 Series 8C D / 6H D11.2018 / 1.0
13 Fault removal
WARNING
Improper troubleshooting work on the valve
Risk of injury!
► For all troubleshooting work on the valve, observe the corresponding
notes in this operating manual or in the operating manuals for the ad-
ditionally installed components.
Please contact the manufacturer if problems occur that are not de-
scribed in this table.
Fault Possible causes Action
No flow Valve closed Open the valve by means of the ac-
tuator
Flange covers (transport protection)
have not been removed
Remove flange covers
Inadequate flow Valve not opened sufficiently Open the valve by means of the ac-
tuator
Blockage in the piping system Check the pipeline
Incorrect valve or incorrect Kvs
value selected
Use valve with correct Kvs value
Stem moves jerkily Stuffing box screw overtightened (in
case of valves with adjustable stem
sealing)
Slacken off the stuffing box screw a
little
Sealing integrity must be main-
tained
Stem or plug doesn't move Stuffing box screw overtightened (in
case of valves with adjustable stem
sealing)
Slacken off the stuffing box screw a
little
Sealing integrity must be main-
tained
Seat and plug very dirty Clean seat and plug
Due to contamination in the me-
dium, the stem or plug has eaten
into its guide
Replace the stem, plug and guides
Stem seal is leaking Stuffing box seal damaged or worn Replace sealing element
Stuffing box pretension too low (in
case of valves with adjustable stem
seal)
Tighten the stuffing box screw
Leakage rate too high in
the closed state
Sealing edges on the plug and/or
seat damaged
Rework or replace plug and/or seat
Dirt/foreign bodies in the valve Clean the interior of the valve,
fit a dirt trap if necessary
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