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Victaulic 751 FireLock Series - User Manual

Victaulic 751 FireLock Series
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HANG THESE INSTRUCTIONS ON THE
INSTALLED VALVE FOR EASY FUTURE REFERENCE
WARNING
• Read and understand all instructions before attempting to install, remove, adjust, or perform maintenance on any Victaulic piping products.
• Depressurize and drain piping systems before attempting to install, remove, adjust, or perform maintenance on any Victaulic piping
products.
• Wear safety glasses, hardhat, and foot protection.
• Save this installation, maintenance, and testing manual for future reference.
Failure to follow instructions and warnings could cause system failure, resulting in death or serious personal injury and property damage.
I-751.VDSINSTALLATION, MAINTENANCE, AND TESTING MANUAL
Series 751 FireLock
™
European Alarm Check Valve Stations
I-751.VDS
REV_F

Table of Contents

Questions and Answers

  • U
    ubriggsAug 4, 2025
    What to do if the Victaulic Control Unit water motor alarm is not ringing?
    • E
      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

Victaulic 751 FireLock Series Specifications

General IconGeneral
Body MaterialDuctile Iron
Seat MaterialEPDM
CoatingOrange Enamel
Connection TypeGrooved
SeriesFireLock Series 751
Maximum Working Pressure300 psi
Pressure Rating300 psi
Sizes2" to 8"
Trim MaterialBronze
Listings/ApprovalsUL, FM
StandardsLPCB, VdS, CE

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