Method Of Operation - Ecolab Inspexx S Betriebsanleitung

BA295S - Backflow Preventer
CONSTRUCTION
Overview

METHOD OF OPERATION

BA type backflow preventers are divided into three pressure
zones. The pressure in zone is higher than in zone  ,
which in turn is higher than in zone  . A discharge valve is
connected to zone  which opens at the latest when the
differential pressure between zones  and  drops to
0.14 bar. The water from zone  discharges to atmosphere,
both check valves close and therefore separate zone  from
zone  and  . In this way the danger of back pressure or
back syphonage into the supply network is prevented. The
pipework connection is interrupted and the drinking water
network is protected.
TRANSPORTATION AND STORAGE
Keep parts in their original packaging and unpack them
shortly before use.
The following parameters apply during transportation and
storage:
Parameter
Environment:
Min. ambient temperature:
Max. ambient temperature:
Min. ambient relative
humidity:
Max. ambient relative
humidity:
*non condensing
2
Value
clean, dry and dust free
5 °C
55 °C
25 % *
85 % *
Product Specification Sheet • EN0H-1252GE23 R1020 • Subject to change
Components
1
Three ball valves for the
connection of a differential
pressure gauge
2
Connection fittings
3
Housing
4
Discharge connection
Not depicted components:
Integral strainer, mesh size
approx. 200 μm
Valve cartridge with integral
check valve and discharge
valve
Outlet check valve
Sealing elements
INSTALLATION GUIDELINES
Setup requirements
• Install shut-off valves before and after backflow
preventer
• Install in horizontal pipework with the discharge valve
downwards
• Ensure good access
– Simplifies maintenance and inspection
• If a fine filter is not installed in the drinking water system,
the installation of a filter with a mesh width of 100 μm is
recommended in front of the backflow preventer
• In case of inlet-pressure fluctuations or a inlet pressure
over 10 bar, we recommend to install a pressure
reducing valve upstream of the backflow preventer
• Do not install in places where flooding can occur
• The installation environment should be protected
against frost and ventilated well
• Install discharge pipework which has adequate capacity
• In order to avoid flooding, it is recommended to arrange
a permanent, professionally dimensioned wastewater
connection
• These armatures need to be maintained regularly
Materials
Brass
Brass
Dezincification-resistant
brass
High-quality synthetic
material
Stainless steel
High-grade synthetic
material
High-grade synthetic
material
Elastomer materials suitable
for drinking water