Owner manual
MAINTENANCE INSTRUCTIONS
COMBINATION AIR VALVE
BARAK, MODEL D-43 2”
INSTALLATION
1. The D-43 combination air valve should be installed vertically on a riser on the
crown of the pipeline.
2. An inlet isolating valve should be installed underneath the D-43 air valve.
PERIODIC MAINTENANCE
- Routine service is an integral part of the standard procedure for maintenance
of a water supply system.
- Recommended routine maintenance - at least once a year, according to the type
and quality of the liquids in the system.
PROCEDURE (Fig. 1, 2)
1. Shut the Isolating Valve under the air valve before servicing.
2. WARNING – Slowly turn the valve Body (3) counterclockwise to release
internal pressure from the air valve. Continue turning to remove the air valve
from the service valve.
3. Wash the threaded area of the air valve Body under running water to remove
accumulated debris from the threaded area of the lower air valve Body.
4. Manually unscrew the Float Lock (5) and remove it from the air valve Body.
5. Remove the Float and Seal Assembly (4) by sliding it out from the air valve
Body.
6. Wash the Float and Seal Assembly thoroughly under running water, paying
special attention to the Air Release Orice (Fig.2), the Air Release Rolling Seal
(4b) and the Air & Vacuum Seal (4a).
7. Visually examine the Air Release Rolling Seal and the Air & Vacuum Seal for
any cracks or tears. If found, replace the entire Float and Seal Assembly unit. **
8. Manually verify free and unhindered movement between the Upper
Component and the Lower Component of the Float and Seal Assembly
(Fig. 2). Clean the slots of any debris that might cause interference.
9. Manually unscrew and remove the Discharge Outlet (1) from the air valve Body.
Thoroughly wash the Discharge Outlet and the air valve Body under running
water. Remove all debris from the Discharge Outlet screen.
10. Manually screw the Discharge Outlet tightly into the air valve Body.
11. Slide the Float and Seal Assembly into the air valve body, Upper Component
side rst (Fig. 2).
12. Manually screw the Float Lock into the air valve Body tightly till the end.
13. Wash the threaded area of the Service Valve.
14. Manually screw the D-43 Air Valve on the Isolating Valve and turn tightly till
the end.
15. Slowly open the Isolating Valve.
** The Float and Seal Assembly unit can easily be replaced in the eld.
The old Float and Seal Assembly unit should be recycled in an approved
Recycle Container for plastic materials.