5
EN
2.1 Installation
Before installing the BA backflow preventer, check that:
• The BA device must be easily accessible to allow inspection,
maintenance and replacement of defective components
• Test points must be provided to enable the system to be
tested without difficulty
• It must not be installed in areas subject to flooding
• It must be installed in a ventilated area (non-polluted
atmosphere)
• The relief system must be capable of discharging the relief
flow
• It must be protected against frost and extreme temperatures
• It must be installed horizontally with the relief port facing
down
• The funnel, with air gap, must be connected to the relief
network
• It can only be used for potential backflow not exceeding the
relief capacity
The protection device must be installed by a qualified technician.
2.2 Commissioning
1. Flush and fully drain the upstream pipes before installing the
BA protection device with its accessories.
2. Install the BA protection device with its accessories, in the
direction of flow, as follows:
• Upstream: one type SOCLA or equivalent Butterfly valve,
• Between the upstream valve and the device: one type Socla
Y333P or equivalent mesh strainer with drain cock.
• Downstream: one type Socla or equivalent Butterfly valve.
Adhere to the installation diagram below:
The protection system must be assembled without forcing
the inlet and outlet fittings
3. Fit the funnel on the BA protection device. It is designed
to be connected to a pipe (e.g. PVC discharge pipe) with
external diameter equal to the diameter shown (see
ø
F).
2.3 Filling with water:
During filling with water:
• The upstream and downstream valves are closed,
• Open the upstream valve slowly, to bring the BA protection
system up to pressure gradually,
•
Open and close tap No. 1 and then taps 2 and 3
respectively to drain the BA protection device,
• Open the downstream valve slowly, to commission the BA
protection system.
Once the BA protection system has been commissioned, it:
• Ensures that the downstream water requirement is met
• Protects the upstream network against the risk of pollution
PRECAUTIONS
:
• In the case of an upstream diversion in the area right in
front of the backflow preventer, it is necessary to install
a check valve between the diversion and the backflow
preventer.
2. Installation instructions
1
2 3
Set of protection BA4760
REF
DN
H
LT
ØF
mm
mm
mm
mm
149B3486
65
247,34
740
40
149B3097
80
270,51
844
40
149B3098
100
352,52
986
60
149B3400
150
405,06
1224
60
149B3401
200
485,7
1485
60
149B3402
250
485,7
1631
60
Watter
supply
inlet
Internal
Distribution
Celling, vault, beam...
Ground, floor, walkway
Sever
conduit
Drain
H
H
LT
ØF
0,5 mini
1,5 maxi
Passage :
distance adapted to
maintenance operations
