Victaulic 751 FireLock Series

Questions and Answers

U
ubriggsAug 4, 2025
What to do if the Victaulic Control Unit water motor alarm is not ringing?
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  Elizabeth BarnettAug 4, 2025
  If the Victaulic Control Unit's water motor alarm isn't ringing or is weak, first ensure that the holes in the seat ring aren't plugged to allow water into the intermediate chamber. Also, check that check valves isolate each valve's alarm line in the system, preventing leaks from another valve's alarm line drain. Finally, confirm the correct restrictor size is installed in the alarm line drain; if incorrect, replace it according to the trim drawing.
J
James SwansonAug 13, 2025
Why is water leaking from the Victaulic 751 FireLock Control Unit intermediate chamber?
- J
  Johnny WadeAug 13, 2025
  If water leaks from the intermediate chamber of your Victaulic Control Unit, check the clapper seal and seat for physical damage and ensure no debris is present. Also, ensure there's no vacuum in the alarm line. If a vacuum exists, install a Series 752V Retard Vent Kit or create an air break in the alarm line.
S
Shannon PowellAug 25, 2025
How to fix a fluctuating water pressure gauge on a Victaulic 751 FireLock Control Unit?
- K
  Kristine CruzAug 25, 2025
  If the system water pressure gauge is fluctuating with the supply pressure in your Victaulic Control Unit, check the bypass check valve's orientation, ensuring the arrow points from the supply side to the system side. Also, remove the threaded cap to the check valve and clear any debris, ensuring the clapper moves freely.

Summary

HAZARD IDENTIFICATION

WARNING

Defines hazards resulting in death or serious personal injury if not followed.

CAUTION

Defines hazards resulting in personal injury and property damage if not followed.

INSTALLER SAFETY INSTRUCTIONS

GENERAL

MAINTENANCE AND TESTING

IMPORTANT INSTALLATION INFORMATION

VALVE;TRIM INSTALLATION

Step-by-step instructions for installing the valve and its trim components.

HYDROSTATIC TESTING

PLACING THE SYSTEM IN SERVICE

EXTERNAL INSPECTION

REQUIRED SYSTEM TESTS

MAIN DRAIN TEST

WATER FLOW ALARM TEST

REQUIRED INTERNAL INSPECTION

MAINTENANCE

REMOVING AND REPLACING THE CLAPPER SEAL FOR DN80, DN100, AND DN150 SIZE VALVES

REMOVING AND REPLACING THE CLAPPER SEAL FOR DN200 SIZE VALVES

REMOVING AND REPLACING THE CLAPPER ASSEMBLY (ALL SIZES)

TROUBLESHOOTING