Viking - C-1 Window Sprinklers
Viking - C-1 Window Sprinklers
Viking - C-1 Window Sprinklers
1. DESCRIPTION
Viking Model C-1 Window Sprinklers are non-automatic, open, “outside” sprinklers intended for
protection of windows, walls, and roofs against exposure fires. The directional discharge pro-
duces a flat 180° fan-shaped spray pattern. Used to produce a water curtain, they are installed
on manual or automatic deluge systems.
3. technical data
Specifications:
Available since 1971.
Minimum Operating Pressure: 7 psi (0.5 bar)
Rated to 175 psi (12 bar) water working pressure
Model C-1 Window Sprinklers are installed on fixed fire protection systems, such as deluge systems, where total flooding is re-
quired. They produce a flat 180° fan-shaped spray pattern.
They are available in various orifice sizes. The smallest nozzle passage is 1/4” (6 mm) for VK790; 5/16 (8 mm) for VK791; 3/8”
(10 mm) for VK792; 7/16” (11 mm) for VK793, 1/2” (13 mm) for VK794, 5/8” (16 mm) for VK795, and 3/4” (19 mm) for VK796.
The orifice size and SIN are stamped on the wrench boss.
Thread size: 1/2” (15 mm) for VK790-VK794, 3/4” (20 mm) NPT for VK795 and VK796
Nominal K-Factors: Refer to the Approval Chart
Overall Length: Refer to the Approval Chart
Spray Nozzle Material Standards:
Viking Technical Data may be found on
Nozzle Body: Brass UNS-C36000
The Viking Corporation’s Web site at
Ordering Information: (Also refer to the current Viking price list.) http://www.vikinggroupinc.com.
Order Model C-1 Window Sprinklers by selecting the appropriate part number
The Web site may include a more recent
from the Approval Chart.
edition of this Technical Data Page.
Available Finishes: Brass or Chrome
For example, Spray Nozzle VK790 with a Brass finish = Part No. 01320BA
4. Installation
WARNING: Viking Model C-1 Window Sprinklers are manufactured and tested to meet the rigid requirements of the approving
agency. The nozzles are designed to be installed in accordance with recognized installation standards. Deviation from the stand-
ards or any alteration to the nozzle after it leaves the factory including, but not limited to: painting, plating, coating, or modification,
may render the unit inoperative and will automatically nullify the approval and any guarantee made by The Viking Corporation.
The Approval Chart on page 13 shows listings and approvals of Model C-1 Window Sprinklers for use on water spray systems. The
chart shows listings and approvals available at the time of printing. Other approvals are in process. Check with the manufacturer
for any additional approvals.
A. Spray nozzles are to be installed in accordance with the latest edition of Viking technical data, the latest published
standards of NFPA, FM Global, LPCB, APSAD, VdS or other similar organizations, and also with the provisions of gov-
ernmental codes, ordinances, and standards whenever applicable. The use of Model C-1 Window Sprinklers may be
limited due to occupancy and hazard. Refer to the Authority Having Jurisdiction prior to installation.
B. Window Sprinklers are installed on fixed fire protection systems, such as deluge systems, where total flooding is required.
C. Handle sprinklers and spray nozzles with care. They must be stored in a cool, dry place in their original shipping container. Never
install a sprinkler or spray nozzle that has been dropped or damaged.
D. Corrosion-resistant sprinklers and spray nozzles must be installed when subject to corrosive atmospheres. When installing cor-
rosion resistant nozzles, take care not to damage the corrosion resistant coating.
Form No. F_051800 Replaces pages 11-13, dated December 12, 2013.
(Added distribution coverage charts.)
Spray Nozzle 12 December 20, 2013
5. Operation
Model C-1 Window Sprinklers are open sprinklers used to produce a water curtain. They are installed on manual or automatic
deluge systems to protect windows against outside exposing fires.
Approval Chart
Model C-1 Window Sprinklers
DESIGN CRITERIA
(Also refer to the Approval Chart on page 13.)
FM Approval Requirements:
Consult FM Approval Guide for acceptable applications. ���������������������������������������������������������������������������������������������
For installation in accordance with the latest applicable FM Loss Prevention Data Sheets and
Technical Advisory Bulletins. FM Global Loss Prevention Data Sheets and Technical Advisory Bulletins contain guidelines relating to, but not limited to:
minimum water supply requirements, hydraulic design, ceiling slope and obstructions, minimum and maximum allowable spacing, and distance below
the ceiling.
Pipline Strainers
Orifice diameter is less than 3/8” (9.4 mm) for Model C-1 Window Sprinklers with K-Factors of 2.1 and 1.5. A pipeline strainer with a 1/8” (3.2 mm) or
less perforation is required for FM Approval.
NOTE: The FM installation guidelines may differ from cULus and/or NFPA criteria.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Viking window sprin-
klers are to be installed in accordance with the latest edition of Viking technical data, the appropriate standards
of NFPA, FM Global, LPCB, APSAD, VdS or other similar organizations, and also with the provisions of govern-
mental codes, ordinances, and standards, whenever applicable.
B. Sprinklers and spray nozzles that have been painted or mechanically damaged must be replaced immediately. Nozzles showing
signs of corrosion shall be tested and/or replaced immediately as required. When replacing spray nozzles, use only new spray
nozzles.
1. Using a standard crescent wrench, remove the old spray nozzle and install the new unit. Care must be taken to ensure that
the replacement spray nozzle is the proper model with the correct K-Factor. The nozzle orifice size and SIN are stamped on
the wrench boss.
C. The spray nozzle discharge pattern is critical for proper fire protection. Therefore, nothing should be hung from, attached to,
or otherwise obstruct the discharge pattern. All obstructions must be immediately removed or, if necessary, additional nozzles
installed.
D. Fire protection systems that have been subjected to a fire must be returned to service as soon as possible. The entire system
must be inspected for damage and repaired or replaced as necessary. Spray nozzles that have been exposed to corrosive prod-
ucts of combustion or high ambient temperatures, should be replaced. Refer to the Authority Having Jurisdiction for minimum
replacement requirements.
7. availability
The Viking Model C-1 Window Sprinklers are available through a network of domestic and international distributors. See The Viking
Corporation web site for the closest distributor or contact The Viking Corporation.
8. Guarantee
For details of warranty, refer to Viking’s current list price schedule or contact Viking directly.
December 20, 2013
WINDOW SPRINKLER MODEL : VK790 * SPRAY COVERAGE EXTENDS BEYOND AN AREA THAT COULD BE ACCURATELY MEASURED.
BASE P/N: 01320B SCALE: EACH SQUARE EQUALS ONE FOOT.
K-FACTOR: 1.5 U.S. (21.6 METRIC)
Figure 2: VK790 Distribution Coverage
WINDOW SPRINKLER MODEL : VK791 * SPRAY COVERAGE EXTENDS BEYOND AN AREA THAT COULD BE ACCURATELY MEASURED.
BASE P/N: 01321B SCALE: EACH SQUARE EQUALS ONE FOOT.
K-FACTOR: 2.1 U.S. (30.3 METRIC)
WINDOW SPRINKLER MODEL: VK792 * SPRAY COVERAGE EXTENDS BEYOND AN AREA THAT COULD BE ACCURATELY MEASURED.
BASE P/N: 01322B SCALE: EACH SQUARE EQUALS ONE FOOT.
K-FACTOR: 3.0 U.S. (43.2 METRIC)
Figure 4: VK792 Distribution Coverage
WINDOW SPRINKLER MODEL: VK793 * SPRAY COVERAGE EXTENDS BEYOND AN AREA THAT COULD BE ACCURATELY MEASURED.
BASE P/N: 01323B SCALE: EACH SQUARE EQUALS ONE FOOT.
K-FACTOR: 4.3 U.S. (62.0 METRIC)
Figure 5: VK793 Distribution Coverage
Form No. F_051800 Replaces pages 11-13, dated December 12, 2013.
(Added distribution coverage charts.)