Viking VK520 Technical Data

January 20, 2006
ESFR Upright Sprinkler SIN VK520
(Shown with the ordinary
temperature rated element.)
1. PRODUCT NAME
Viking Early Suppression Fast Response
Upright Sprinkler SIN VK520† (K=14.0)
• Sprinkler Base Part Number 10625
• U.S. Patent No. 6,585,054
Available since 2000.
† The Sprinkler Identification Number (SIN) is
stamped on the sprinkler deflector.
2. MANUFACTURER
THE VIKING CORPORATION
210 N. Industrial Park Road
Hastings, Michigan 49058 USA
Telephone: (269) 945-9501
(877) 384-5464
Fax: (269) 945-9599
e-mail: techsvcs@vikingcorp.com
3. PRODUCT DESCRIPTION
Viking Early Suppression Fast Response
(ESFR) Upright Sprinkler SIN VK520 is a
fast response fusible element type sprin-
kler designed for early fire suppression.
With a 14.0 nominal K-Factor and spe-
cial deflector, this sprinkler produces
large, high-momentum water droplets in
a hemispheric pattern below the deflec-
tor. This permits penetration of the fire
plume and direct wetting of the burning
fuel surface while cooling the atmo-
sphere early in the development of a
high-challenge fire.
ESFR Upright Sprinkler SIN VK520 may
be used in the protection of ordinary
types of storage. However, it is primar-
ily intended to protect types of storage
that tend to produce severe challenge
fires: palletized and solid pile storage
Note: Units of measure in parentheses may be approximations.
Form No. F_060298
TECHNICAL DATA
and single, double, multiple row, and
portable open rack storage (no open-top
containers or solid shelves).
Viking ESFR Upright SIN VK520
Sprinklers provide protection of most
common storage materials up to 30 ft
(9,1 m) high in buildings up to 35 ft (10,7
m) high, including:
• Encapsulated or unencapsulated
Class I, II, III, and IV commodities*.
• Cartoned unexpanded plastics*.
• Cartoned expanded plastics*.
In addition, some storage arrangements
of rolled paper and rubber tire stor-
age may be protected by Viking ESFR
Upright Sprinkler SIN VK520*.
* REFER TO THE LATEST
APPLICABLE FM LOSS
PREVENTION DATA SHEETS,
INCLUDING 2-2 AND 8-9, AND
THE LATEST NFPA STANDARDS.
4. TECHNICAL INFORMATION
Viking ESFR Upright Sprinkler
SIN VK520 has special FM Approv-
al for use with the following types
of obstructed construction:
May be installed above continuous,
ungrouped obstructions up to and
including 4" (100 mm) wide.
Definition of "UNGROUPED": For
pipes, conduits, or groups of pipes
and conduit to be considered indi-
vidual or ungrouped, they must be
separated from the closest adjacent
pipe, conduit, cable tray, etc., by a
minimum of 6 times the width of the
obstruction. For example, a 1" (25
mm) diameter conduit would need to
be a minimum of 6" (150 mm) from
the nearest pipe or conduit to be
considered individual or ungrouped.
A cable tray 4" (100 mm) wide would
need to be a minimum of 24" (600
mm) from the nearest pipe, conduit,
cable tray, etc., to be considered indi-
vidual or ungrouped.
NOTE: No sprig required for sprin-
kler pipe sizes up to and including
3" (76,2 mm) nominal I.D.
ESFR UPRIGHT SPRINKLER
SIN VK520 (K = 14.0)
APPROVAL: FM Approved and ac-
cepted for use, City of New York
Department of Buildings—refer to
the chart on page 121 b.
Rated to 175 psi (1 207 kPa) water
working pressure.
Factory tested hydrostatically to 500 psi
(3 447 kPa).
K-Factor: Nominal 14.0 U.S. (20,2 met-
ric, for use when pressure is meas-
ured in kPa).
Thread Size: 3/4" (20 mm) NPT
Deflector Diameter: 2-7/8" (73,0 mm)
Overall Length: 3-3/8" (85,7 mm)
SPRINKLER MATERIALS
Frame: Brass Casting UNS-C84400
Seat (pip cap) and Insert Assembly:
Copper UNS-C11000 and Stainless
Steel UNS-S30400
Belleville Spring Sealing Assembly:
Nickel Alloy, coated on both sides
with Teflon Tape
Screw: Stainless Steel UNS-S31603
Deflector: Copper UNS-C19500 or
UNS-C51000
Lock-Nut: Brass UNS-C36000
Trigger and Support: Stainless Steel
UNS-S31600
Fusible Element Assembly: Beryllium
Nickel, coated with black acrylic
paint
Ejector Spring (for the ordinary tem-
perature rated sprinkler only): 17-7
Stainless Steel
AVAILABLE FINISH: Brass
ACCESSORIES
Sprinkler Wrench Part No. 05118CW/B
• Available since 1981.
Sprinkler Cabinet Part No. 03985A
• Capacity: six (6) sprinklers
• Length: 12-5/8" (321 mm)
• Height: 9-1/8" (232 mm)
Depth: 4-1/8" (105 mm)
•
• Finish: High Gloss Red Enamel
• Available since 1977.
5. AVAILABILITY & SERVICE
Viking products are available through
a network of domestic, Canadian, and
international distributors. See the Viking
Corp. Web site for your closest distribu-
tor or contact The Viking Corporation.
Replaces page 121 a-d, dated May 28, 2004 (updated
design requirements and re-formatted the page).
Sprinkler 121 a