HG1
5.5 Impermissible operation
In order to operate the valve as efficiently as possible and to avoid malfunctions:
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Valves must not be used to support the pipeline nor as a step-up. This includes the different kinds of opera-
tion like hand levers, gear operators, actuators, feedback and control systems.
>
Never operate the valve without actuating devices and/or locking of the shut-off-element.
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Do not exceed the pressure and temperature range specified on the valve or specified in the technical data
(PS / TS, the corresponding pressure-temperature range diagram can be found in chapter technical data un-
der pressure-temperature range diagram).
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Avoid all foreign particles on the sealing surfaces.
>
Do not operate the valve in the cavitation area.
>
The throttling and control range in an intermediate position with an opening of 0 to 20% is not permissible in
the long run, as the flow rate will be excessive high and the valve will be damaged.
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Version 0 • Dokument-Nr. 74572811
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