DUKER 4510 Series Руководство по эксплуатации - Страница 4
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Do not operate a valve whose permissible component operating pressure ("Ps") and maxi-
mum permissible operating temperature ("Ts") are not sufficient for the operating condition.
The area of application is marked on the valve.
Within the permissible operating temperatures, there is a risk of injury when working on the
piping components at temperatures below 10 ° C and above 40 ° C. Therefore, protective
measures should be taken in these cases.
Operating fluids must comply with the specification of the valve. The manufacturer assumes no
liability for corrosion damage caused by aggressive media. Failure to comply with this require-
ment can endanger life and limb and cause damage to the piping system.
The valve must be properly installed in the pipeline.
In the pipeline the usual flow velocities (e.g. according to EN 1074-1: 2.5 – 5 m/s for liquids must not
be exceeded in continuous service.
Abnormal operating conditions such as vibrations, water hammers, erosion, cavitation and greater
fractions of solids in the medium – especially wearing solids – must be clarified with the manufacturer.
2.3
Special risks
Before opening and/ or repairing valve, the pipe must be completely depressurized. The pipe
should be completely emptied before replacing wearing part
For valves used as an end fitting: In normal service a blank flange or a cover must be
mounted on the free pipe connection or the valve must be securely locked in the
"SHUT/CLOSED" position. Caution on closing such a valve: Beware of risk of crushing!
Issue 03
Düker GmbH – www.dueker.de
page 4