2.5 Safety devices
Safety equipment
Safety function
Limit switch for top of gravity
shaft:
Protection against access to the danger area of the feed/
discharge screw when the system is switched on
❒ If the inspection cover is opened, the system is switched
off via the limit switch
➥ The power supply remains switched on
Burn back flap:
Burn back protection system (BPS) directly below the top of
the gravity shaft. During the heating up phase, after loading
has taken place and in the event of a fault, it reliably
disconnects the discharge and infeed devices, preventing fire
from spreading to the fuel store.
❒ Depending on the design of the system, a burn back flap
or a rotary valve is fitted.
Rotary valve:
Water Sprinkler System:
Self-activating extinguisher system to limit burn back around
the top of the gravity shaft.
If the temperature in the top of the gravity shaft rises above 95
°C, the valve of the sprinkler system opens, water flows out
and prevents the fire from spreading to the fuel store.
TMF:
Temperature monitoring device in the fuel store (as per TRVB
H118, Austria only) which activates the customer’s alarm(s)
when the temperature in the fuel store exceeds 70 °C.
Safety
2
Safety devices
Installation and Operating Instructions | M1730116_en
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