Victaulic FireLock NXT 769 Series Manual

IPS CARBON STEEL PIPE – FIRE PROTECTION PRODUCTS
Series 769 FireLock NXT™ Preaction Valve
With Preaction Trim
Grooved X Grooved
PRODUCT DESCRIPTION
FM
APPROVED
See Victaulic
publication 10.01
for details.
Clapper
Seat
Exaggerated for Clarity
NOTE: Valve is shown above in the "set" position
® REGISTERED TRADEMARK OF VICTAULIC – © COPYRIGHT 2005 VICTAULIC – PRINTED IN U.S.A. – SKU #WCAS-6DRKJ4
United States • Phone: 1-800-PICK-VIC (1-800-742-5842) • Fax: 610-250-8817 • e-mail: pickvic@victaulic.com
Canada • Phone: 905-884-7444 • Fax: 905-884-9774 • e-mail: viccanada@victaulic.com
Europe • Phone: 32-9-381-1500 • Fax: 32-9-380-4438 • e-mail: viceuro@victaulic.be
UK • Phone: 44(0)1438741100 • Fax: 44(0)1438313883 • e-mail: viceuro@victaulic.be
Central and South America • Phone: 610-559-3300 • Fax: 610-559-3608 • e-mail: vical@victaulic.com
Australasia • Phone: 86-21-54253300 • Fax: 86-21-54253671 • e-mail: vicap@victaulic.com
The patent-pending Victaulic Series 769 FireLock NXT™ Preaction Valve controls the water supply entry
into the Preaction system piping and sprinklers. The Preaction System is normally supervised with
pressurized air or nitrogen in order to detect any leaks in the system. The Series 769 is a low differential,
latched clapper valve that uses a unique direct acting diaphragm to separate system water supplies from
Preaction pipe sprinkler systems. The positive latching mechanism uses the supply water pressure from
upstream (city side) of the main control valve to hold the clapper shut. When the water pressure in the
diaphragm chamber is released the latch retracts from the clapper and the valve actuates. The low
differential and unique latch and actuator design of the valve allows the valve to be self-resetting;
therefore it is not necessary to remove the cover. The low differential design is not subject to water
columns.
The valve allows the water to operate a water motor alarm and/or electric pressure alarms, which continue
until the flow of water stops.
The valve is rated to 300 psi/2065 kPa water working pressure for sizes 4 – 8"/40 – 200 mm. The valve is
factory tested hydrostatically to 600 psi/4135 kPa for sizes 4 – 8"/40 – 200 mm. Required air pressure is
13 psi/90 kPa. The Series 769 is available grooved x grooved. Standard grooved dimensions conform to
ANSI/AWWA C606.
Victaulic Series 769 Preaction valves do NOT require a separate check valve in the preaction system and
feature a straight though valve body design that provides superior flow and low-pressure drop. The valve
body is tapped with a special drain for a complete system. Full trim packages for non-interlocked, single-
interlocked and double-interlocked systems are available. The valve has simple access to all internal
parts for easy maintenance. All internal parts are replaceable.
Maintenance and service can be performed from the installed position. The rubber clapper seal is
replaced easily without removing the clapper from the valve. The body is tapped for main drain and all
available trim configurations. The valve is painted inside and out to increase corrosion resistance.
The Victaulic Series 769 FireLock NXT Preaction valve features reduced trim pieces and slim design for
reduced footprint and substantial space and weight savings. Trim includes an alarm test valve, which
allows testing of the alarm system without reducing the system pressure. The valve is available bare, pre-
®
trimmed, as a Vic -Quick Riser or in a Series 745 FireLock Fire-Pac Cabinet.
Pre-trimmed
The pre-trimmed valve comes completely assembled with all necessary trim components including any
optional accessories for quick assembly and set up.
Vic-Quick Riser
The Vic-Quick Riser comes completely pre-trimmed and includes a shut off
valve (uses a Series 705W FireLock Butterfly valve – request publication
Latch
10.18) for system shut off, pressure switches, and a drain kit for ease of
installation. For complete Vic-Quick Riser information request publication
30.20.
Series 745 FireLock Fire-Pac
The Fire-Pac is a completely pre-assembled fire protection valve that
provides maximum service in a minimal enclosed space. The unit includes a
water supply shutoff valve, the sprinkler system fire protection valve, alarm
line pressure switches, air supervisory pressure switches, supervisory pump
switches, and digital pressure gauges that are easily viewed through a
Diaphragm
Assembly
window in the cabinet door. For complete Fire-Pac information request
publication 30.23.
Clapper
Seal
30.82
VICTAULIC ® IS AN ISO 9001 CERTIFIED COMPANY
4220 REV A