IMPORTANT INFORMATION
WARNING WARNING
Read and understand all instructions •
before attempting to perform maintenance
on any Victaulic piping products.
Wear safety glasses, hardhat, and foot •
protection.
Failure to follow these instructions could
result in serious personal injury, property
damage, and/or product failure.
Depressurize and drain the piping •
system before attempting to remove,
adjust, or perform maintenance on any
Victaulic piping products.
Failure to follow this instruction could
result in serious personal injury and/or
property damage.
REMOVING THE SYSTEM FROM SERVICE
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.
1. Notify the authority having jurisdiction, remote station alarm moni-
tors, and those in the affected area that the system is being taken
out of service.
2. Open the water supply main drain valve fully to flush the water
supply of any contaminants.
3. Close the water supply main drain valve.
Water Supply Main
Control Valve
4. Close the water supply main control valve to take the system out of
service.
The following instructions are a guide for removing and replacing the diaphragm in Series 764, 768,
and 769 FireLock NXT
™
Fire Protection Valves. It is important to replace the diaphragm with a new,
Victaulic-supplied diaphragm of the correct diameter to ensure proper valve operation.
I-NXT.DIA_1
Series 764, 768 and 769
REPLACING THE DIAPHRAGM IN SERIES 764, 768, AND 769 FIRELOCK
NXT™ FIRE PROTECTION VALVES
I-NXT.DIAREPLACEMENT KIT INSTRUCTIONS
www.victaulic.com
VICTAULIC IS A REGISTERED TRADEMARK OF VICTAULIC COMPANY. © 2009 VICTAULIC COMPANY. ALL RIGHTS RESERVED. PRINTED IN THE USA.
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