4
Hydraulic operation of IN ANGLE backwash valves:
In backwash mode: the hydraulic command [1], pressuri-
zes the upper control chamber [2], forcing the diaphragm
[3] down moving downwards the metal axis [4]. As a re-
sult, the seal [5] closes tightly incoming dirty water port
1. This communicates the dirty flow coming out from the
filter (C port) to the drain port 2.
In filtration mode: we drain pressure out of the upper
control chamber [2], the spring [7] moves the metal axis
upwards. The seal [5] closes the drain port seat 2 and
then the incoming dirty water goes from incoming port 1
to C port to be filtered in disc filter.
Hydraulic operation of IN LINE backwash valves:
In backwash mode: the hydraulic command [1] pressuri-
zes the lower control chamber [2], moving the diaphragm
[3] and the metal axis [4] upwards. As a result, seal [5]
closes tightly the incoming port 2. This communicates
C port (dirty flow coming out from the filter) with drain
port 1.
In filtration mode: we drain pressure out of the lower con-
trol chamber [2], the spring [7] moves the diaphragm [3]
and metal axis [4] downwards. The seal [5] closes tightly
the drain port 1 and therefore the incoming dirty water
goes into the filter to be filtered from 2 port to C port.
Operation and maintenance manual
Installation recommendations
Installation recommendations
• 1’’ triple effect air vale
• 2’’ triple effect air valve
• Drainage 63 mm:
The backwash flow is between
7 and 28 cubic meters/hour.
• Drainage 63 mm:
The backwash flow is between
7 and 28 cubic meters/hour.
• Dirty water
• Dirty water
• Clean Water:
* If pressure in the filtration
station is lower than 2,5 bar,
we recommend a sustaining
pressure hydraulic valve in
the outlet HDPE manifold
(downstream).
• Clean Water:
* If pressure in the filtration
station is lower than 2,5 bar,
we recommend a sustaining
pressure hydraulic valve in
the outlet HDPE manifold
(downstream).
[2]
[5]
[6]
[3]
[4]
[1]
2
1
C
Backwash
2
[7]
1
C
2
Filtration
Inlet clean water to electrorelays
Drainage of upper chambers of
IN ANGLE backwash valves
NO
NO
Inlet clean water to electrorelays
Hydraulic control of backwash valves in
vertical configuration filtration stations
Hydraulic control of backwash valves in
horizontal configuration filtration stations
Drainage of lower chambers of
IN LINE backwash valves
NO
NO
Filtration
2
[7]
C
1
2
Backwash
1
[3]
[2]
[6]
[4]
[5]
[1]
2
C
1