Series 751 FireLock® Alarm Check Valve
16
Removing and Replacing the Clapper Seal for
4 – 6-inch (100 – 150-mm) Size Valves
1.
Perform steps 1 – 5 of the "Required Internal Inspection" section,
starting on page 12.
2.
Remove the seal-assembly bolt/bolt seal from the clapper.
3.
Remove the seal-retaining ring.
4.
Remove the solid clapper seal from the clapper. Inspect the seal.
If the solid clapper seal is torn or worn, replace it with a new, Victaulic-
supplied solid clapper seal.
5.
Make sure contaminants, dirt, and mineral deposits are removed
from the clapper.
6.
Install the solid clapper seal into the clapper.
NOTE:
Make sure
the sealing lip is pointing upward.
7.
Place the seal-retaining ring onto the solid seal.
8.
Install the seal-assembly bolt/bolt seal through the seal-retaining
ring and the clapper. Tighten the seal-assembly bolt/bolt seal sufficient-
ly, and apply an additional
1
/
4
turn to ensure a proper seal.
CAUTION
• Use only Victaulic-supplied replacement parts.
Failure to follow this instruction could cause improper valve opera-
tion, resulting in property damage.