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Specifications subject without notice
Edition: August 2017
Operating instructions BA 26l-02_EN
Warning
Preventing misuse of the ball valve:
It is especially important to make sure that the selected lining for wetted parts in the ball valve is suitable for the
media used as well as the prevailing pressures and temperatures.
Failure to follow these safety precautions may result in personal injury and can damage equipment
installed in the pipeline. The manufacturer does not assume any final responsibility.
Danger
The valve should only be operated and serviced by personnel appropriately qualified for pressurized
pipelines.
Skilled staff in the sense of these operating instructions is persons who, as a result of their training, their
knowledge and their experience, as well as their knowledge of the relevant standards, are able to judge the tasks
assigned to them and are able to recognize possible dangers.
Make sure that the pipeline and control equipment have been installed correctly and are checked at regular intervals. The
valve body wall thickness must be designed to take into account an additional load Fz in the usual order
(Fz = π/4•DN²•PS) for a correctly sized pipeline.
The valve needs to be connected correctly to the pipeline.
Make sure the usual flow velocities are not exceeded in continuous service in this pipeline. Exceptional operating
conditions such as oscillations, water hammering, cavitation and large proportions of solid matter in the process medium,
especially abrasive, must be clarified beforehand with the manufacturer.
Warning
We recommend to open and close the valve regularly. Depending on the valve model, we recommend opening
and closing the valve at least once a year.
Depending on how long the valve remains in one position, breakaway and operating torques may differ
considerably than those specified in the data sheet.
Ball valves that are operated at temperatures greater than +50°C or lower than -20°C must be protected, together with the
pipeline connections, against being touched.
2.3
Particular hazards
Danger
Prior to removing the ball valve from the pipeline, relieve pressure entirely in the pipeline to ensure the process
medium cannot escape uncontrollably from the pipeline.
Warning
Should it be necessary to remove a ball valve from the pipeline, process medium may escape from the pipe or out
of the ball valve. In the case of process media that can damage health or are dangerous, drain the pipeline
completely before removing the ball valve from the pipeline.
Take special care concerning any remaining media that may still be in the pipeline or have collected in the cavities
of the valve.
Warning
Only unscrew or loosen any screws or bolts connecting the body parts after the valve has been removed from the
pipeline. Tighten the screws on reassembly with a torque wrench according to repair instructions <
EB26l
>.
Warning
For ball valves intended for dead-end service:
During standard operation, in particular, with gases or hot and/or dangerous media, mount a blank flange at the
free end connection or ensure that the ball valve is properly protected against unauthorized operation.
Warning
If a ball valve used for dead-end service must be opened in a pressurized pipeline, special care must be taken to
ensure that any process media escaping under pressure do not cause any damage.
