Victaulic FireLock NXT 768 Series - Removing and Replacing the Diaphragm Assembly

REMOVINGANDREPLACINGTHEDIAPHRAGMASSEMBLY
1. Remove the system from service by following steps 1 – 10 of the
“Required Internal Inspection” section.
2. Break the unions that connect the trim to the diaphragm cover.
Refer to the applicable trim drawing for details.
3. Remove the cap screws from the diaphragm cover, and pull the
diaphragm cover/trim off the valve.
4. Remove the diaphragm from the valve body.
5. Clean the back of the valve body to remove any debris that may
interfere with proper diaphragm seating.
5a. Clean the inside of the diaphragm cover to remove any foreign
material.
CAUTION
Usecautionwheninstallinganewdiaphragmintothevalve•
body.
Failuretofollowthisinstructioncouldcausedamagetothe
diaphragm,resultinginimpropervalveoperationandvalve
leakage.
6. Replace the diaphragm with a new, Victaulic-supplied diaphragm.
Align the holes in the diaphragm with the holes in the valve body.
Be careful not to damage the diaphragm during installation.
I-768_37
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.
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