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DEHOUST GMBH – GUTENBERGSTR. 5-7 – D-69181 LEIMEN – www.dehoust.com
3. Description
The
break tank system
performs the separation of drinking water from fluids of category 5 under DIN EN 1717 and prevents
recontamination in the central mains water network. The DIN EN 1717 requires the separation of fluids in category 5 from drinking
water. Examples of category 5 fluids are rainwater, process water from grey water utilisation, well water, as well as applications in
the areas of agriculture, slaughter houses, laboratory equipment, of irrigation systems, agricultural operations, slaughterhouses
and subsurface irrigation systems.
3.1.
Functional description
A mechanical float valve (closes by float lift) regulates the fill level and the feed that is required in the tank. As water is drawn, the
water level drops and the mechanical float valve opens, allowing drinking water to flow into the tank. When water is no longer being
drawn, the level in the tank rises again and the mechanical float valve switches off the drinking water feed once the maximum level
is reached. The immersion pressure pump installed in the tank has an integrated automatic switch and dry-run protection. In case
of a pressure drop to approx. 2.5 bar in the process water line, this is registered by the automatic switch and the immersion
pressure pump is switched on until the switch-off pressure is reached again. The immersion pressure pump will continue running
for approx. 10 seconds after reaching the switch-off pressure.
To reduce the switching frequency of the pressure booster, the installation of a membrane pressure
expansion vessel of at least 50 litres in volume is recommended in the process water pressure line. The
membrane pressure expansion vessel must be suitable for operation with process water. The primary
pressure in the membrane pressure expansion vessel must be 0.3 to 0.5 bar below the start-up pressure of
the pump.
3.2.
Technical specifications
Table 1: Technical details on break tank system
Name
Break tank system
AQF
570/5
Article number
812903
Medium
Process water
Nominal contents of storage tank
495 litres
Delivery rate
max. 5.5 m³/h
Delivery height
max. 48 m
Operating pressure
max. 10 bar
Flow pressure drinking water field
min. 1 bar; max. 5 bar
max. flow quantity drinking water at
4 bar flow pressure
6 m³/h
Medium temperature drinking water
+ 5°C to 20 °C
Connection drinking water line
3/4“ inside thread
Connection process water line
1“ outside thread
Connection overflow line
DN 70
Mains voltage
230 V AC , 50 Hz, 16 A
Power consumption:
1,125 Watt input
Ambient temperature
5°C to 20 °C
Empty weight
32 kg
Total weight with filled storage
container
525 kg
Dimensions of complete system
LxWxH [mm]
720 x 720 x 1,730
