Series 756 FireLock
®
European Dry Valve Stations
23
MAINTENANCE
The following steps instruct on how to remove and replace inter-
nal valve components. It is important that care be taken to avoid
damage to parts.
Removing and Replacing Clapper Seal
1.
Perform steps 1 – 8 of the “Required Internal Inspection”
section, starting on page 21.
2.
Remove the seal assembly bolt/bolt seal from the clapper,
as shown above.
3.
Remove the seal retaining ring. This seal retaining ring will
need to be re-installed in later steps.
4.
Pry the edge of the seal washer from inside the clapper
seal, as shown above.
DO NOT
pry the seal washer out from the
inner hole. Remove the seal washer from the clapper seal. Dry
up any water that is under the seal washer.
5.
Pry the clapper seal, along with the seal ring, out of the
clapper, as shown above. Inspect the seal. If the seal is torn or
worn, replace it with a new, Victaulic-supplied seal.
5a.
If the seal ring was removed from the clapper seal in
the previous step:
Re-insert the ring carefully underneath the
outer lip of the clapper seal. Make sure the smaller diameter of
the seal ring is toward the sealing surface of the clapper seal, as
shown above.
WARNING
• Depressurize and drain the piping system
before attempting to install, remove, or adjust
any Victaulic piping products.
Failure to follow this instruction could cause prod-
uct failure, resulting in serious personal injury
and/or property damage.
CAUTION
• Any activities that require taking the valve out of
service may eliminate the fire protection provided.
• Before servicing or testing the system, notify the
authority having jurisdiction.
• Consideration of a fire patrol should be given in
the affected areas.
Failure to follow these instructions could cause seri-
ous personal injury and/or property damage.
CAUTION
• DO NOT pry the seal washer out of the clapper seal from the inner hole.
Failure to follow this instruction could damage the seal washer, resulting in
improper clapper sealing and/or property damage.
Larger diameter
of clapper seal
is installed in
clapper
Smaller diameters
of seal ring and
clapper seal
Sealing side
of clapper seal
(faces out of
clapper)
