OPERATION AND MAINTENANCE MANUAL
01-2016
3
1 TECHNICAL DESCRIPTION
1.1 PRODUCT DESIGNATION AND IDENTIFICATION
The subject of this Operation and Maintenance Manual is:
Type BA reduced pressure zone antipollution (anticontamination) check valves.
1.2 USE
The P/N 1350 type BA low-pressure antipollution (anticontamination) check valves are intended for
protecting building water supply systems from contamination backflow within the pressure range from 0.05 MPa
to 1.6 MPa and temperatures up to +70ºC.
1.3 TECHNICAL SPECIFICATION
The P/N 1350 type BA low-pressure antipollution (anticontamination) check valves
are intended to protect water supply systems from contamination with backflow liquids.
- Available diameters:
DN65-DN250
- Max medium flow rate:
4 m/s;
- Max operating pressure (PS):
1.0 MPa
1.6 MPa
- Max operating temperature (TS):
70ºC.
The valves are designed according to PN-EN 12729: 2005, a product standard for
devices which
protect potable water from backflow contamination, controllable backflow preventer with a reduced pressure
zone, family B, type A.
A distinct feature of the Type BA antipollution check valves is a two-chamber design which allows
isolating the incoming medium flow and automatic removal of medium residues from the reduced
pressure chamber.
Protection against pollution of potable water in water installations and general requirements
of devices to prevent pollution by backflow are explained in PN-EN 1717: 2003, where type BA valves can be
controllable and protect potable water supply installations from pollution with Category 2 liquids.
Antipollution valves can be used as check valves in indoor installation only when placed
between a water meter and the receiver(s) and generally in horizontal pipelines. The valve body features a flow
direction arrow.
The valve connection flange design is acc. to PN-EN 1092-2: 1999, with the sizes compliant with the
nominal pressure values.
Nominal PN pressure:
- 0.6 MPa
- 1.0 MPa
- 1.6 MPa
Installation length of flanged and bell socket tapped antipollution valves:
- see the size table.
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