Series 751 FireLock® Alarm Check Valve
15
6.
Pry the clapper seal, along with the seal ring, out of the clapper.
Inspect the seal. If the clapper seal is torn or worn, replace it with a new,
Victaulic-supplied clapper seal. If replacing the clapper seal assembly
with a new assembly, skip to step 7 below.
If using the same clapper seal assembly, and the seal ring was re-
moved from the clapper seal in the previous step:
Re-insert the seal
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.
7.
Insert the seal washer carefully underneath the sealing lip of the
gasket.
8.
Make sure contaminants, dirt, and mineral deposits are removed
from the clapper.
9.
Install the clapper seal into the clapper carefully. Make sure the
seal ring snaps into the clapper completely.
10.
Place the seal-retaining ring onto the seal washer of the clapper
seal.
11.
Install the seal-assembly bolt/bolt seal through the seal-retaining
ring and clapper. Tighten the seal-assembly bolt/bolt seal sufficiently,
and apply an additional
1
/
4
turn to ensure a proper seal.
12.
Replace the cover plate by following the "Installing the Cover
Plate Gasket and Cover Plate" section, starting on page 18.
13.
Place the system back in service by following the "Placing the
System in Service" section, starting on page 9.
CAUTION
• Use only Victaulic-supplied replacement parts.
Failure to follow this instruction could cause improper valve opera-
tion, resulting in 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)