I-768N
/ Series 768N FireLock NXT
™
Dry Valve
/ Installation, Maintenance, and Testing Manual
REMOVING AND REPLACING THE CLAPPER
SEAL
1.
Perform steps 1 – 13 of the “Required Internal Inspection” section.
2.
Remove the seal assembly bolt/bolt seal from the clapper seal.
3.
Remove the seal-retaining ring. Save the seal-retaining ring for
re-installation.
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 valve leakage.
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.
5.
Remove the seal washer from the clapper seal. Dry up any
moisture under the seal washer or on the clapper seal.
CAUTION
• Use only Victaulic-supplied replacement parts.
Failure to follow this instruction could cause improper valve
operation, resulting in property damage.
6.
Pry the clapper seal, along with the seal ring, out of the clapper.
Inspect the clapper 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.
6a.
If using the same clapper seal assembly and the seal ring was
removed from the clapper seal in the previous step: Re-insert the
seal ring carefully underneath the outer lip of the clapper seal.
Ensure that 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.
Remove any debris from the clapper. Inspect the clapper for
damage that may affect the sealing capabilities of the new clapper
seal. Contact Victaulic of the clapper requires replacement.
I-768N_27
REV_C
