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 procedures:
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 V3000MF or equivalent manual
stop valve,
•
Between the upstream valve and the device: one type
SOCLA Y222P or equivalent mesh strainer with drain cock.
•
Downstream: one type SOCLA V3000MF or equivalent
manual stop valve
Adhere to the installation diagram below:
The protection system must be assembled without forcing the
inlet and outlet fittings
3. Remove the protection plug from the valve port
4. 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 in the table
below:
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 and commissioning instructions
DN of backflow preventer
15 20 25 32 40 50
ext. Ø of pipe (in mm)
32
40
50
1
2
3
Ceiling, vault, beam...
Ground, floor, walkway...
Water supply
inlet
Internal
distribution
Sewer
Conduit
Drain
H
0,50 m (mini.) 1,50 m (maxi.)
0,50 m (mini.)
H
