BA300 - Backflow Preventer
2
Product Specification Sheet • EN0H-1242GE23 R1117 • Subject to change
CONSTRUCTION
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:
*non condensing
INSTALLATION GUIDELINES
Setup requirements
•
Install shut-off valves before and after backflow
preventer
•
Install backflow preventer downstream of the filter or
strainer
–
This protects the appliance against dirt
•
Install in horizontal pipework with the discharge valve
downwards
•
Ensure good access
–
Simplifies maintenance and inspection
•
In order to avoid flooding, it is recommended to arrange
a permanent, professionally dimensioned wastewater
connection
•
The installation environment should be protected
against frost and ventilated well
•
Install discharge pipework which has adequate capacity
•
These armatures need to be maintained regularly
Overview
Components
Materials
1
Three ball valves for the
connection of a differential
pressure gauge
Brass
2
Inlet/Outlet check valves
Stainless Steel
3
Housing
Ductile iron, powder-coated
with polyamide
4
Discharge valve
CW626N with stainless steel
seat
5
Pressure control line
Polyethylene with stainless
steel braid
(BA300-80ZVDS stainless
steel)
Not depicted components:
Diaphragm
EPDM
Sealing washers
EPDM
Parameter
Value
Environment:
clean, dry and dust free
Min. ambient temperature:
5 °C
Max. ambient temperature:
55 °C
Min. ambient relative
humidity:
25 % *
Max. ambient relative
humidity:
85 % *
