Technical Information - Watts Industries BA BM 015 Manual Del Usuario

BACKFLOW PREVENTERS BA BM
2

Technical Information

Field of application:
• Protection against fl uid category 4 (EN1717),
examples of applications:
- Soap dispensing units;
- Photoshop equipment;
- Sealed heating systems > 45 kW;
- Brewery and distillation plant.
Note: applications also refer to national
requirements.
• Medium: potable water.
• Maximum working temperature 65 °C.
• Maximum pressure 1 MPa (10 bar).
• Inlet fl ow pressure minimum 200 kPa (2 bar).
Installation and commissioning instructions
• Installation of a backfl ow preventer BA shall be carried out by qualifi ed personnel.
• Before installing the protection unit BA the upstream piping shall be fl ushed thoroughly.
• Install the BA-unit, consisting in fl ow direction of a fi rst stop valve, strainer, BA-protection
device and a second stop valve. The BA-unit must be readily accessible to allow access for
testing, repair and replacement. The following dimensions shall be observed (see drawing 4)
• The BA-unit shall be installed horizontally with the air-gap-to-drain downwards and without any
tension and/or traction at the inlet and outlet connections.
• The location of installation shall not be liable to any fl ooding at all times and has to be protected
against freezing.
• Discharge from the relief valve shall be by means of gravity fl ow to a drain port being mindful of
the following fl ow rates in table A.
Table A
ø DN
Ø DN
m 3 /h
6 8
6 8 10
40 40 40
Introduction
The controllable backfl ow preventer BA BM
with reduced pressure zones protects potable
water systems against pollution caused by
backpressure or by backsiphonage.
Type
BA BM 015
BA BM 020
BA BM 025
BA BM 032
BA BM 040
BA BM 050
* Article number for UK
Compliance with EN1717, EN12729 and on
national level
• France
• Germany
• Netherlands
• United Kingdom
10 15 20
15 20 25
40 60 60
Article number *
DN Device Unit
15 405015310 405015311
20 405020310 405020311
25 405025310 405025311
32 405032310 405032311
40 405040310 405040311
50 405050310 405050311
NF045 / Document
Technique 6.
DVGW Arbeitsblatt W570.
BRL-K646.
WRAS-criteria.
25 32
32 40
80 80
40
50
80