GB
MU0H-1264 GE23 R0818
3
Honeywell GmbH
1
Safety Guidelines
1.
Follow the installation instructions.
2.
Use the appliance
•
according to its intended use
•
in good condition
•
with due regard to safety and risk of danger.
3.
Note that the appliance is exclusively for use in the
applications detailed in these installation instructions.
Any other use will not be considered to comply with
requirements and would invalidate the warranty.
4.
Please take note that any assembly, commissioning,
servicing and adjustment work may only be carried out
by authorized persons.
5.
Immediately rectify any malfunctions which may
influence safety.
2
Description of Function
BFW type backflow preventers are divided into 2 pressure
zones. The pressure in zone
is higher than in zone
. A
discharge valve positioned in zone
opens when the
differential pressure between zones
and
has dropped
to 0.14 bar at the very latest. The water from zone
is
discharged into the athmosphere, the check valve closes,
separating zone
from zone
.
In this way the danger of back pressure or back-siphonage
into the supply network is prevented. The water supply is
interrupted, and the drinking water network protected.
3
Technical Data
Note:
The mobile backflow preventer BFW112 in accordance
with DIN 14346 is connected to existing standpipes or
pillar hydrants to take water for fire fighting from the
pipeline network. It prevents water from flowing back into
the drinking water supply network as a result of back
siphonage or back pressure, if the pressure in this
network is lower than that in the pipeline laid for
firefighting purposes.
In addition, pressure surges do not occur in the network,
which helps to prevent burst pipes.
Media
Medium:
Drinking water / quench water
Connections/Sizes
Connection: B-Storz
Rotatable on the input side
Fixed on output side
Hydraulic properties
Opening pressure:
0.5 bar
Max. inlet pressure:
16.0 bar
Liquid category in accordance with EN 1717
Liquid category:
4
Material
Housing Aluminium
Piston Aluminium
Seals EPDM
Weight
Weight 3
kg
Operating temperature
Max. operating temperature: 65°C
Specifications
Installation position:
Horizontal up to inclanation
30°
Temperature of medium:
Cold water
