Victaulic FireLock NXT 776 Series User Manual

MAINTENANCE
The following sections instruct on how to remove and replace internal
valve components. Care must be taken to avoid damage to parts during
removal and installation.
WARNING
Depressurizeanddrainthepipingsystem•
beforeattemptingtoremovethecoverplate
fromthevalve.
Failuretofollowthisinstructioncouldresult
inseriouspersonalinjuryand/orproperty
damage.
CAUTION
Anyactivitiesthatrequiretakingthe•
valveoutofservicemayeliminatethe
fireprotectionprovided.
Beforeservicingortestingthesystem,•
notifytheauthorityhavingjurisdiction.
Considerationofafirepatrolshouldbe•
givenintheaffectedareas.
Failuretofollowtheseinstructionscould
resultinseriouspersonalinjuryand/or
propertydamage.
REMOVINGANDREPLACINGTHECLAPPERSEAL
1. Perform steps 1 – 12 of the “Required Internal Inspection” section.
2. Remove the seal assembly bolt/bolt seal from the clapper seal.
3. Remove the seal-retaining ring.
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 that is under the seal washer and 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.
I-769D_37
FireLockNXT™DelugeValve
SERIES 769
I-769DINSTALLATION,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.
REV_D

Victaulic FireLock NXT 776 Series Specifications

General

Brand	Victaulic
Model	FireLock NXT 776 Series
Category	Control Unit
Language	English