A.R.I. D-070-P EN - Manual (Page 2)

PERIODIC MAINTENANCE
The purpose of periodic maintenance: check integrity of the seals and clean the
sealing areas.
The frequency of maintenance will be determined by the condition of the water
system – weekly, monthly, quarterly etc.
The maintenance of the Dynamic Air Valve is performed for 2 separate parts:
MAINTENANCE OF THE OPERATING VALVE
1. Shut the isolating valve on the riser below the air valve.
2. Unscrew the Operating Valve Body (2).
3. Remove the Clamping Stem (4) and the Operating Assembly (5). Wash the
inside of the Body , the Clamping Stem , the Operating Assembly , the
Rolling Seal (3), and the O-ring (7) with clean water.
4. Gently wash and clean the sealing area inside the valve body.
5. Check the O-Ring visually for any defects. Replace if needed.
6. Check and make sure that the Rolling Seal is intact (not torn or cracked)
and is positioned precisely in the middle of its groove in the Operating
Assembly. Replace if needed.
7. The disc at the bottom of the Operating Assembly (Fig. 4) should be loose
and move freely. Do not tighten the holding screw.
8. Reassemble the Operating Valve after maintenance.
MAINTENANCE OF THE DYNAMIC VALVE BODY
9. Unscrew and remove the Locking Ring (6) together with the attached
Operating Valve. Remove the Air & Vacuum Sealing Assembly (9) from the
Body (11).
10. Wash the Body and the Locking Ring in clean water in order to remove
coarse grime or accumulated scale.
11. Wash the Air & Vacuum Sealing Assembly and check the rubber parts for
any tears. Replace the entire unit if needed.
Do not open screws of the assembly under any circumstances.
12. Make sure that the drill hole is clean and the passage is open (Figure 5).
13. Make sure that there is no dirt or debris around the sealing area of the
dynamic valve body.
14. Replace the assembly in the body, reassemble in reverse order, then fasten
and tighten the Locking Ring.
15. Open the isolating valve beneath the air valve, making sure that there are
no leaks.
FIg. 5
Air & Vacuum Sealing Assembly
Fig. 4 Operating Assembly
Disc
Sealing Assembly Drill Hole
4
3
11
8
5
2
1
6
10
7
9
Fig. 3