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Specifications subject without notice
Edition:
August 2017 Operating instructions BA 01a-01_
Warning
Preventing misuse of the control valve:
It is especially important to make sure that the selected lining for wetted parts in the control 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.
An actuator unit mounted subsequently onto the valve must fit the control valve properly and its final positions, especially
the closed position, need to be correctly adjusted.
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 and to the control equipment.
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. To take t
his matter into account on sizing the actuator, specify
how long the valve is to remain in the same position in your inquiry.
When the actuator is mounted subsequently onto the valve by the operator, the manufacturer does not assume
any final responsibility for the correctness of the actuator sizing regarding how long the valve is to remain in one
Control 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.
Do not insert your hand into the valve while it is being tested not yet installed into the pipeline. Otherwise, serious
injuries may occur.
2.3 Particular hazards
Prior to removing the control 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 control valve from the pipeline, process medium may escape from the pipe or
out of the contr
ol valve. In the case of process media that can damage health or are dangerous, drain the pipeline
completely before removing the control 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.
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 the instructions <EB01a,EB01b,
EB01c,EB01z,EB06a or EB08a>.
For control 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 control valve is properly protected against unauthorised operation.
