GENO
®
-flushing compressor 1988 K
Order no. 015 151 963-inter Created: KONS-gmei-mrie G:\BA-151963-INTER_GENO-SPUELKOMP-1988_K.DOC
42
9.
Determine the minimum flow speeds of the flushing sections.
DIN EN 806-4 6.2.3 recommends a minimum flow speed of 0.5 m/s
in each piping section when flushing drinking water installations
prior to commissioning.
With sanitation flushing of corroded piping, we recommend a
minimum flow speed of 1.5 m/s.
Table based on EN 806-4 6.2.3 Table 7. Recommended minimum flow
rate and minimum number of withdrawal points which are to be
opened for flushing depending on the largest nominal diameter of the
piping in the flushed section for the minimum flow speeds of 0.5 m/s /
1.5 m/s.
Largest nominal diameter of the piping in the
flushed section
[DN]
25
32
40
50 65 80
100
[Inches]
1"
1 ¼"
1 ½"
2"
2 ½"
3"
4"
The following thus applies for flushing with a minimum flow rate of 0.5 m/s
Recommended minimum volumetric flow rate
[m³/h]
0.9
1.4
2.3
3.5
6.0
9.0
14.1
Parallel connection of flushing compressors
[Number]
1
1
1
1
2
2
-
Minimum number of withdrawal points with DN
15 or equivalent cross sectional area which are to
be fully opened
[Number]
1
2
3
4 6 9
14
The following thus applies for sanitation flushing with a minimum flow rate of 1.5 m/s
Recommended minimum volumetric flow rate
[m³/h]
2.7
4.3
6.8
10.6
17.9
27.1
42.4
Parallel connection of flushing compressors
[Number]
1
1
2
2
-
-
-
Minimum number of withdrawal points with DN
15 or equivalent cross sectional area which are to
be fully opened
[Number]
3
5
8
12 20 30
47
Note:
The current flow in m³/h can be read off the GENO
®
-flushing
compressor 1988 K display.
