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Danger!
There is a risk of poisoning or suffocation when working in containers. Relevant
personal protection measures (e.g. respiratory devices, protective clothing, etc.)
must be taken before work is carried out.
The bypass container may be pressurized. The interior of the bypass container may contain
a hot, toxic, caustic or explosive medium. There is a risk of injury due to liquid spraying out
of the container, burns on the hands, arms, feet and face as well as caustic burns,
intoxication (poisoning) or explosion. The container must be depressurized prior to opening
it.
Application and field of use
An approval has been issued for the BNA...EX for use as explosion-protected equipment within the
scope of application defined by EC Guideline 94/9/EC in hazardous areas. They comply with the
specifications regulating use of mechanical equipment in explosion risk areas.
The technical data in these operating instructions must be complied with.
See the installation and operating instructions for the accessory fittings and instruments
(level transmitter MG, magnetic switch, etc.).
Ignition protection BNA ... EX without Magnetic roller display:
II 1 G c T1...T6 Ignition
protection BNA ... EX with Magnetic roller display :
II 1/2 G c T1...T6
Float and chamber Zone 0 / Magnetic roller display Zone 1
Attention !
The bypass level indicators may only be used within the maximum pressure and
temperature levels listed on the type plate.
Exceeding these parametric levels may result in
malfunction or destruction of the bypass level indicator as well as to personal injury and
property damage.
All of the materials used in the bypass chamber and float must be resistant to the medium the level
of which is to be monitored. The maximum values listed on the type plate must be complied with to
ensure operation free of malfunction.
At temperatures exceeding 60°C, a sign must be attached to flanges, pipes, casing, etc. clearly
warning of the risk of burn injuries.
Structure and functional description
KSR bypass level indicators are based on the functional principle of the communicating vessel. A
float fitted with a built-in permanent magnet is located inside the bypass level indicator. The float
height position changes with the medium level. The resulting motion of the magnetic field actuates
optical and visual level displays or limit switches attached to the outside of the bypass tube.
Processing and display based on ultrasound is also feasible.
Fig. 1 illustrates the basic structure. Detailed customer specifications can be realized as per order.
Removal of transport packaging and transport safety devices
Carefully remove the BNA…EX bypass level indicator from the transport packaging.
Please comply with the instructions on the shipping packaging and remove all transport retention
elements before taking out the BNA…EX bypass level indicator. Never exert force to remove the
BNA…EX bypass level indicator from the package!
Remove any float retainer bands before installing the BNA…EX bypass level indicator. Make sure
all packaging elements have been removed and that the float can move freely within the bypass
chamber.
