A.R.I. D-020 EN - Manual

D-020
COMBINATION AIR VALVE FOR WASTEWATER
A.R.I. Flow Control Accessories Ltd. Kfar-Charuv 12932 Israel Tel. 972-4-6761988 Fax. 972-4-6763402 www.arivalves.com
Periodic Maintenance
(Every 6 months and according to liquid quality)
1) Shut the isolating valve underneath the air
valve.
2) Open the drainage tap (3).
3) Attach quick release connection to the drainage
outlet (4) on top of the valve.
4) Flush clean water via the drainage opening (4)
in the air valve until seeing clean water running
from the ball valve (3)
Pressure rating for back-flush: 3 bar.
5) Shut off the drainage tap (3)
6) Reopen the isolating valve.
Installation
1) The wastewater air valve should be installed
vertically on the upper portion of the pipe line.
2) An isolating valve should be installed
underneath the air valve.
3) Do not turn separately the plastic head (1) of
the air valve. To change the direction of drainage
connecting, one must turn the whole valve or the
upper cover, by loosening the screws (2) and
turning the head at a 90
0 angle (turning the plastic
head may damage the valve performance due to
air escape).
Warning! Do not remove or disassemble
the air valve from pipeline before
performing the following steps:
1) Turn off riser shut off valve.
2) Open up pressure release valve located on the
base of the D-020.
3) Remove valve from line only after ensuring that
internal pressure in the valve has been released.
Comprehensive Periodic Maintenance
1) Shut the isolating valve underneath the air
valve.
2) Open the drainage tap (3) and drain the air
valve.
3) Open the 4 screws on top cover of air valve (2).
4) Pull out the mechanism. Wash the mechanism
and the inside of the air valve.
5) Reassemble back the mechanism and tighten
the screws (1/2”) (2). Pay attention to correct
placing of seal’s O-Ring.
6) Close the drainage tap (3).
7) Reopen the isolating valve.
4 1
2
3
A.R.I.
0302ENM-D020-10