Victaulic FireLock NXT 764 Series User Manual

11. Tighten the seal-assembly bolt/bolt seal to the torque value listed in
the table below to ensure a proper seal.
REQUIREDSEAL-ASSEMBLYBOLT/BOLTSEALTORQUES
Size Torque
Actual
OutsideDiameter
NominalSize
inches inch-lbs
inches
mm N•m
1 ½
1.900
48.3
40
5
2
2.375
60.3
40
5
2 ½
2.875
73.0
90
10
76.1 mm
3.000
76.1
90
10
3
3.500
88.9
90
10
4
4.500
114 . 3
110
12
165.1 mm
6.500
165.1
160
18
6
6.625
168.3
160
18
8
8.625
219.1
160
18
12. Replace the cover plate by following the “Installing the Cover Plate
Gasket and Cover Plate” section.
13. Place the system back in service by following the “Placing the
System in Service” section.
REMOVINGANDREPLACINGTHECLAPPERASSEMBLY
1. Perform steps 1 – 13 of the “Required Internal Inspection” section.
2. Remove the clapper shaft bushings from the valve body.
3. Remove the clapper shaft. NOTE: As the shaft is being removed,
the clapper spring will drop out of position. Keep the clapper
spring for re-installation.
4. Remove the clapper from the valve body.
I-768_34
FireLockNXT™DryValve
SERIES768
I-768INSTALLATION,MAINTENANCE,ANDTESTINGMANUAL
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VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2007 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
REV_D

Victaulic FireLock NXT 764 Series Specifications

General

Brand	Victaulic
Model	FireLock NXT 764 Series
Category	Control Unit
Language	English