Watts Industries BA BM Serie Manual Tecnico página 2

Backflow Preventers Ba BM
2
Technical Information
Field of application:
• Protection against fluid 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 flow pressure minimum 200 kPa (2 bar).
Installation and commissioning instructions
• Installation of a backflow preventer BA shall be carried out by qualified personnel.
• Before installing the protection unit BA the upstream piping shall be flushed thoroughly.
• Install the BA-unit, consisting in flow direction of a first 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 flooding at all times and has to be protected
against freezing.
• Remove the sealing plug from the relief valve.
• The drain port dimension is meant to connect with a plastic waste pipe with an external diameter
in accordance with table A.
Introduction
The controllable backflow preventer BA BM
with reduced pressure zones protects potable
water systems against pollution caused by
backpressure or by backsiphonage.
Article number *
Type DN Device
BA BM 015 15 405015310
BA BM 020 20 405020310
BA BM 025 25 405025310
BA BM 032 32 405032310
BA BM 040 40 405040310
BA BM 050 50 405050310
* Article number for UK
Compliance with EN1717, EN12729,
Acoustic Group (AG) ISO 3822 class 1
(DN15-DN32), and on national level:
• France NF045 / Document
Technique 3.
• Germany DVGW Arbeitsblatt W570,
P-IX 870/I.
• Netherlands Kiwa BRL-K646.
• United Kingdom WRAS-criteria.
• Belgium Belgaqua.
• Italy SIET Rules 01588ST10.
• Sweden SITAC 1002 - TG 0659-09.
• Switzerland SVGW W/TPW135.
• Norway SINTEF Produktsertifikat
Nr. 1498.
• Denmark ETA VA 1.57/20243.
Unit
405015311
405020311
405025311
405032311
405040311
405050311