
Series 751 FireLock® Alarm Check Valve
13
5.
Rotate the clapper out of the valve body. Inspect the clapper seal
and seal-retaining ring. Wipe away any contaminants, dirt, and mineral
deposits. Clean out any holes that are plugged in the valve-body seat
ring.
DO NOT USE SOLVENTS OR ABRASIVES.
6.
Inspect the clapper for freedom of movement and physical dam-
age. Replace any damaged or worn parts by following the applicable
instructions in the "Maintenance" section, starting on page 14.
7.
Re-install the cover plate by following the "Installing the Cover
Plate Gasket and Cover Plate" section, starting on page 18.
8.
Place the system back in service by following the "Placing the
System in Service" section, starting on page 9.