A.R.I. D-070 User Manual

MAINTENANCE INSTRUCTIONS

COMBINATION AIR VALVE MODEL D-070

GENERAL

1. The periodic maintenance of the air valve is an integral part in the proper regimen of water pipeline maintenance.

2. The air valve should be maintained at least once a year in accordance with the

quality of the water and the types of uid composition in the system.

INSTALLATION

Before installing the Model D-070 air valve, make sure to ush and drain the

pipeline of all dirt and solids that may be in the line. Caution in the choice of tools: Tools used for installation need to be compatible with the valve parts, especially the bolts, in order to protect the valve parts and coatings from damage. Installation of an isolating valve: Imperative that an isolating valve be installed under each air valve to enable the performance of periodic maintenance. Installation of a riser: It is recommended to install the Model D-070 air valve

on top of a riser (see g.1). Diameter of the riser should be at least one-half the

diameter of the pipeline. Manifold: When the valve is installed on a manifold, the air valves should be installed only on a welded manifold. They should be installed in a manner that the

drainage port openings should face in opposite directions (see g. 2).

Drain Port #2

Drain Port #1

DRAIN PORT

1. Drainage angle: It is recommended installing a drainage angle at the drain

port (#1) exit; the diameter of the drainage angle should be at least the

diameter of the drain port.

2. Maintain an open drain port: Do not seal or block the opening of the valve

drain port (#1).

3. Warning on emission of water: The normal operation of the valve includes

water emissions under pressure. Ensure that the drain port (#1) is not directed toward electrical elements (pumps) or people.

4. Caution: Do not put hands or objects into the drainage port (#1).

5. Drainage Pipe: Drainage pipes can be connected to the drainage angle

to direct the emission water. The end of the drainage pipe should remain completely open and unobstructed. Do not connect a drainage pipe to the

upper drainage port (#2).

WARNING

Perform the following operations prior to maintenance or removal of the air valve from the pipeline:

1. Shut the isolating valve (g.2) on the riser below the air valve.

2. Slowly open cover bolts (D,6) alternately until water and air start to be released. Wait until all the water and air cease to be released before continuing

3. Continue to open the bolts slowly, making sure that the pressure has been released from inside the air valve prior to maintenance/removal from the pipeline.

Fig. 1

Fig. 2 Manifold

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:

Shut the isolating valve on the riser below the air valve.

Maintenance of the Operating Valve

1. Shut the isolating valve on the riser below the air valve.

2. Unscrew the body of the Operating Valve Body (1).

3. Remove the Clamping Stem (2) and the Operating Assembly (4).

4. Wash the inside of the Body, the Clamping Stem, the Operating Assembly,

the Rolling Seal (3), and the O-ring (6) with clean water.

5. Gently wash and clean the sealing area inside the valve Body.

6. Check the O-rings visually for any defects. Replace if needed.

7. Check and make sure that the Rolling Seal (3) is intact (not torn or cracked) and is positioned precisely in the middle of its groove in the Operating Assembly. Replace if needed.

8. The disc at the bottom of the Operating Assembly (4) should be loose and move freely. Do not tighten the holding screw.

MAINTENANCE OF THE DYNAMIC VALVE BODY

9. Unscrew the bolts (8) (with the aid of 2 hex keys, size 19 mm) that connect the main valve cover (7) to its body (10).

10. Remove the Air & Vacuum Sealing Assembly (9) from the body.

11. Wash the body and the cover in clean water in order to remove coarse grime or accumulated scale.

12. Wash the Air & Vacuum Sealing Assembly (9) and check the rubber parts for any tears.

13. Make sure that the drill hole (D-070 sizes 3", 4") is clean and the passage

(D-070 all sizes) is open. Make sure the lower assembly seal is intact and

not torn.

14. Replace the whole Air & Vacuum Sealing Assembly (9) if any of the above parts are torn or damaged.

Do not open screws of the assembly under any circumstances.

15. Make sure that there is no dirt or debris around the sealing area of the dynamic valve body.

16. Replace the assembly in the body, reassemble in reverse order, then fasten and tighten all bolts.

17. Open the isolating valve beneath the air valve, making sure that there are no leaks.

18. Paint the outer body of the dynamic air valve according to need.

Fig. 3

Disc

Fig. 4 Operating Assembly

Sealing Assembly Drill Hole

Fig. 5 Air & Vacuum Sealing Assembly

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