4
Unscrew the seat (4) from the cage (3) being
careful not to lose the renewable seat (9) unless
it
’s being replaced. Remove the plug (5) with
connector (7) attached and the bushing (6).
Note: Bushing is only supplied in older valves
with ductile iron cage.
Unscrew the connector (7) from the plug (5). It
may be necessary to apply heat as these parts
are secured with Loctite.
Remove the float screw (13), lock washer (18)
and float hood (17) from the float ball (12).
Apply heat if necessary.
Inspect all parts for wear and damage. Minor
scratches and dents in the float are normal.
Some floats may contain sand for added weight
but if water is detected replace the float.
Carefully clean the orifice of scale. Replace
damaged parts.
REASSEMBLY
Clean all parts especially seating and sealing
surfaces before reassembling valve. Worn parts
should be replaced during re-assembly.
Apply Loctite 263 to threads on one end of
connector (7), install in plug (5) and tighten.
Install bushing (if needed) in cage.
Lubricate and install renewable seat (9) in plug
and drop plug into cage (3). Install seat (4) over
the plug stem, thread into cage and tighten.
Apply Loctite 263 to exposed threads on
connector (7), screw on the float ball (12) and
tighten.
Lubricate and place seat O-ring (10) in seat (4),
install in cover (2) and tighten.
Ensure mechanism operates freely when float
ball is lifted and allowed to drop.
Apply Loctite 380 to threads on float screw (13)
and install float screw, lock washer (18) and float
hood (17) on bottom of float ball (12).
Lubricate cover O-ring (13) in cover (2) and
install on body (1) ensuring O-ring is retained.
Install the cover bolts (11) and tighten in an
alternating pattern.
Carefully introduce pressure and check for
leaks.
BACKFLUSHING INSTRUCTIONS
Follow all local cross-connection and safety
codes and regulations!
To determine if a GA Industries sewage air valve
needs cleaning or backflushing:
•
Close the inlet isolating valve then slowly
open the ½” flushing ball valve (if installed)
or slowly remove the pipe plug at the top
of air valve to relieve internal pressure.
•
Open the 1” blow off ball valve (if installed)
or remove the pipe plug near the bottom.
Liquid should freely drain from the valve
body. If it does not, then the valve is likely
in need of cleaning or backflushing.
To clean a GA Industries sewage air release
valve equipped with backflushing attachments:
•
Close the inlet isolating valve and then
slowly open
the ½” flushing valve to
relieve internal pressure.
•
Open the
1” blow off valve
•
Connect the ½” flushing valve to a
pressurized source of clean water using
the rubber hose provided with the
backflushing attachments.
•
Introduce flushing water until liquid runs
freely from the blow off valve.
•
Shut off and disconnect the supply of
clean water and close the blow off and
flushing valves.
•
Slowly open the inlet isolating valve. The
air release valve should exhaust air and
then close tightly
REPLACEMENT PARTS
Genuine replacement parts are available from
your local VAG/GA Industries representative or
from the factory:
VAG USA, LLC
234 Clay Avenue
Mars, PA 16046 USA
Telephone: 724-776-1020
Fax: 724-776-1254
E-mail:
Please have the nameplate data available when
ordering parts.
