AMF AMF Users Manual | Page 21
21
Grade Grade Grade Grade anthracite Backwash
3
2
1
0
velocity
With or without flocculation
lateral under-drain filter
with nozzle plate
lateral under-drain filter
10%
0%
10%
10%
10%
10%
80%
90%
10%
0%
0%
50%
20%
>45m/hr
>45m/hr
>20m/hr
0.6 to
1.18mm
nozzle plate filters
0%
10%
10%
50%
20%
>20m/hr
0.6 to
1.18mm
lateral under-drain filter
10%
10%
60%
0%
20%
>45m/hr
1.18 to
2.5mm
nozzle plate filters
0%
10%
60%
0%
20%
>45m/hr
1.18 to
2.5mm
10%
0%
10%
20%
60%
60%
20%
20%
>45m/hr
>45m/hr
lateral under-drain filter 10% 10% 10% 70% >20m/hr
nozzle plate filters 0% 10% 10% 80% >20m/hr
Without flocculation
lateral under-drain filter.
nozzle plate filters
Grade 0 optimised filters