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Victaulic FireLock NXT 764 Series Manual
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Victaulic FireLock NXT 764 Series Manual

Alternate wet/dry valve
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FireLock NXT
™
Alternate Wet/Dry Valve
Series 764
Patent Pending
Certifications/Listings:
EN 12259-2:1999
EN 12259-3:2000
Cert/LPCB Ref. 104g/01
See Victaulic Publication 10.01 for more details.
Product Description:
This patent-pending Victaulic FireLock NXT Series 764
Alternate Valve is a low-differential, latched clapper valve
that uses a unique direct-acting diaphragm to separate
system water supplies from dry-pipe sprinkler systems.
This valve offers a trim system that accommodates both
wet and dry systems and is field-convertible.
victaulic.com
| NXT Alternate Wet/Dry Valve | Series 764 | Publication 30.83
30.83 4630 Rev D Updated 03/2021
© 2021 Victaulic Company. All rights reserved.
1
30.83

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Summary of Contents for Victaulic FireLock NXT 764 Series

  • Page 1 Certifications/Listings: EN 12259-2:1999 EN 12259-3:2000 Cert/LPCB Ref. 104g/01 See Victaulic Publication 10.01 for more details. Product Description: This patent-pending Victaulic FireLock NXT Series 764 Alternate Valve is a low-differential, latched clapper valve that uses a unique direct-acting diaphragm to separate system water supplies from dry-pipe sprinkler systems.
  • Page 2 (Series 705W butterfly valve – request publication 10.18) for system shut-off, pre-set pressure switches, and a drain kit for ease of installation. 30.83 4630 Rev D Updated 03/2021 © 2021 Victaulic Company. All rights reserved. victaulic.com...
  • Page 3 Components shown as dotted lines denote optional equipment 1 Measurements denoted with an asterisk take optional equipment into account. Optional drain connection kit is shown for reference and takeout dimensions. 30.83 4630 Rev D Updated 03/2021 © 2021 Victaulic Company. All rights reserved. victaulic.com...
  • Page 4 60.3 2.743 3.000 8.00 76.1 mm 76.1 2.438 3.500 17.00 88.9 5.182 4.500 21.00 114.3 6.401 6.500 22.00 165.1 mm 165.1 6.711 8.625 50.00 219.1 15.240 30.83 4630 Rev D Updated 03/2021 © 2021 Victaulic Company. All rights reserved. victaulic.com...

  • Page 5: Operation

    The water flows from the intermediate chamber to the alarm line and activates the system’s alarms. These alarms continue to sound until the flow of water stops. 30.83 4630 Rev D Updated 03/2021 © 2021 Victaulic Company. All rights reserved. victaulic.com...

  • Page 6: Material Specifications

    Clapper Shaft Bushing and O-ring (Qty. 2) * NOTE: The 1½-inch/48.3-mm and 2-inch/60.3-mm valve sizes contain washers under the heads of Exaggerated for clarity the cover plate bolts. 30.83 4630 Rev D Updated 03/2021 © 2021 Victaulic Company. All rights reserved. victaulic.com...
  • Page 7 The compressor, low-pressure alarms, ball valves, and required trim are included in the air supply system. 30.83 4630 Rev D Updated 03/2021 © 2021 Victaulic Company. All rights reserved. victaulic.com...
  • Page 8 Series 764 FireLock NXT Alternate Valve, it is not The Series 757 Regulated AMTA provides proper air necessary to install the Victaulic Series 757 Regulated regulation from the air reservoir to the sprinkler system. Air Maintenance Trim Assembly (AMTA). In this case,...
  • Page 9 Restrictor Pressure Switch Slow Fill Ball Valve (Normally Open) Fast Fill Ball Valve (Normally Closed) Strainer (100 Mesh) Spring-Loaded, Soft-Seated Ball Check Valve Exaggerated for clarity 30.83 4630 Rev D Updated 03/2021 © 2021 Victaulic Company. All rights reserved. victaulic.com...
  • Page 10 Wire the alarm pressure switch to activate a water flow alarm. Set the alarm pressure switch to activate on a pressure rise of 4 – 8 psi/28 – 55 kPa. 30.83 4630 Rev D Updated 03/2021 © 2021 Victaulic Company. All rights reserved. victaulic.com...
  • Page 11 Series 755 Manual Pull Station (Optional/ From Water Supply Sold Separately) Wet System Pressure Gauge (0 – 300 psi/0 – 2068 kPa/0 – 20.7 Bar) Exaggerated for clarity 30.83 4630 Rev D Updated 03/2021 © 2021 Victaulic Company. All rights reserved. victaulic.com...
  • Page 12 PDF format on our website at victaulic.com Victaulic reserves the right to change product specifications, designs and standard equipment without notice and without incurring obligations. Warranty Refer to the Warranty section of the current Price List or contact Victaulic for details. Trademarks Victaulic and FireLock are registered trademarks of Victaulic Company.