Watts SOCLA BA BM, Руководство по установке

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6
EN
11
10
13
12
15
14
4
3
6
8
1
2
9
5
7
Key
1. Top cover
2. Pressure adjuster screw
3. Drain plug
4. Drain screw
5. Safety membrane
6. Compensation membrane
7. Filter
8. Cover seal
9. Strainer cover
10. Seal
11. Pressure test pipe
12. Operating membrane
13. Spring
14. Spring washer
15. Spring washer
3. Maintenance and inspection of
installed backflow preventers
In accordance with national
statutory regulations, BA backflow
preventers must be regularly
inspected (once a year in most
countries) by an authorised
maintenance technician.
BA backflow preventers must
undergo compulsory annual testing
using test equipment conforming
to NF P43-018, such Watts or
equivalent (ref. 2234900M2).
This equipment must be checked at least once every two
years.
A- Remove the cover (3) by unscrewing the screws (4).
B- Remove the spacer (5).
3.3 Refitting instructions
Check and lightly re-grease the O-rings
• Install the downstream valve (7) in its seat in the main body (1)
• Install the relief valve module (8) in its seat in the relief body (2)
• Install the upstream valve (6) in its seat in the main body (1)
and arrange the fins at 45°
• Position the inner spacer (5) between the upstream and
downstream valves (6 and 7) and above the relief valve
assembly (8). There is only one possible position
• Fit the cover (3) and tighten the screws (4)
Removal
C- Remove the upstream valve (6).
D- Remove the relief valve module (8), using the M10 bolt
supplied in the kit.
E- Remove the downstream valve (7).
3.1 Testing kit
3.2 Instructions for fitting/removal for maintenance purposes