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7 Maintenance and trouble-
shooting
The regulators do not require any mainte-
nance. Nevertheless, they are subject to nat-
ural wear, particularly at the seat, plug and
operating diaphragm.
Depending on the operating conditions,
check the regulator at regular intervals to
avoid possible malfunctions.
Details on faults and how to remedy them
can be found in Table 1:
Î We recommend removing the valve from
the pipeline.
Î When used at high temperatures, allow
the plant section to cool down to ambient
temperature.
Î As valves are not free of cavities, remem-
ber that residual process medium might
still be contained in the valve.
EB 3003 EN
Maintenance and troubleshooting
WARNING!
Excessive pressure may cause parts
to move.
− Before performing any work on the
regulator, depressurize the relevant
plant section and, depending on
the process medium, drain it as
well.
− Shut off or disconnect the control
lines.
13
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