Victaulic FireLock NXT 776 Series - Page 38

CAUTION
DONOTusesolventsorabrasivesonornearthevalvebody•
seatring.
Failuretofollowthisinstructioncouldpreventtheclapper
fromsealing,resultinginimpropervalveoperationand/orvalve
leakage.
13. 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.
14. While the clapper is rotated out of the valve body, pull the latch
forward to inspect the diaphragm. If the diaphragm shows any
signs of wear or damage, replace it with a new, Victaulic-supplied
diaphragm. Refer to the “Removing and Replacing the Diaphragm
Assembly” section.
15. Inspect the clapper for freedom of movement and physical dam-
age. Replace any damaged or worn parts by following the appli-
cable instructions in the “Maintenance” section.
16. Re-install the cover plate by following the “Installing the Cover
Plate Gasket and Cover Plate” section.
17. Place the system back in service by following the “Placing the
System in Service” section.
I-769D_36
FireLockNXT™DelugeValve
SERIES 769
I-769D
INSTALLATION,MAINTENANCE,ANDTESTINGMANUAL
www.victaulic.com
VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2007 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
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