8
4. Close ventilation valve V1.
The filter station
AL-TAP
is now ready to filter.
V1=ZU
Note:
With the first use of the cartridge, the first 20 litres filtered must be discarded to be
absolutely sure clear water comes out (fabrication residues can be within the membrane).
Filtration operation:
Filtration takes place as soon as the stop valve V2 and outlet
valve V3 are opened.
The flow rate depends on the geodetic suction height
∆
H.
Suction
Height
∆H
Flow rate (new
cartridge)
Typical Flow rate
(in operation*)
0 m
0.7 L/min
≙
1000 L/day 0.2 L/min
≙
288 L/day
1 m
2.0 L/min
≙
2880 L/day 0.6 L/min
≙
864 L/day
2 m
3.2 L/min
≙
4608 L/day 1.0 L/min
≙
1440 L/day
3 m
4.4 L/min
≙
6336 L/day 1.4 L/min
≙
2016 L/day
*
Note:
- The flow rate is strongly dependent on the raw water quality and
membrane blockage
- The suction pressure is only ready if the suction hose is completely
vented!
Table: Flow rate as a function of the suction height
∆
H and
blockage
During filtration operation, filtration is possible down to the
membrane base, since the membrane is impermeable to air
when saturated. The fibres will dry as air enters the system
(at 20°C, after approx. 3 hours). After drying, it is necessary
to ventilate the system again according to Chap. 6.
V1=ZU
V2=OFFEN
V3=ZU
V1
V1
V2
V3
