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STANDARD RESPONSE 


FUSIBLE LINK UPRIGHT 
AND PENDENT SPRINKLERS
TECHNICAL DATA
March 24, 2006
Nickel Alloy, coated on both sides 
with Teflon Tape
Screw: Stainless Steel UNS-S30300
Pip Cap: Copper UNS-C11000
Button: Copper UNS-C19400
AVAILABLE FINISHES
Brass, Chrome-Enloy®, White Poly finish, and Black Polyester in all temperature ratings; Wax-Coated Brass for sprinklers with temperature ratings through 
286 °F (141 °C). 
5. ACCESSORIES (order separately)
Sprinkler Cabinets:
A. Six-head capacity: Part No. 01724A
B. Twelve-head capacity: Part No. 
01725A (available since 1971).
Sprinkler Wrenches:
A. Standard Sprinkler Wrench: Part No. 
10896W/B (available since 2000) or 
05000CW/B (no longer available). 
Standard wrench is also to be used 
for wax coated sprinklers.
B. Wrench for Polyester coated and recessed sprinklers: Part No. 07398W* 
(available since 1990).
Requires a ½” ratchet (not available from 
Viking).
Refer to the “Sprinkler Accessories” section of the Viking data book.
*
Note: Units of measure in parentheses may be approximations.
Form No. F_030492
Replaces page 18 a-b, dated March 4, 2005 (updated the approval 
chart). Refer to page SR1-2 for general care, installation, and 
maintenance information.
Sprinkler 18 a
Sprinkler Temperature
Classification
Sprinkler Nominal
Temperature Rating1
Maximum Ambient
Ceiling Temperature2
Frame Paint 
Color1
Ordinary 165 °F (74 °C) 100 °F (38 °C) None
Intermediate 220 °F (104 °C) 150 °F (65 °C) White
High 286 °F (141 °C) 225 °F (107 °C) Blue
Sprinkler Finishes: Brass and Chrome-Enloy® (patents pending) (White Poly finish and 
Black Polyester is available for Part Nos. 05506, 05508, 05514, 05557, and 05576 only.)
Corrosion-Resistant Coatings3
: White Poly finish and Black Polyester in all temperature 
ratings for Part Nos. 05506, 05508, 05514, 05557, and 05576 only.
Wax-Coated Brass with the following temperature ratings:
165 °F (74 °C) Lt. Brown Wax 220 °F (104 °C) Dk. Brown Wax
286 °F (141 °C) Dk. Brown Wax 
Footnotes
1 Decorative sprinklers may not be color coded. The temperature rating is stamped on the 
deflector.
2 Based on NFPA. Other limits may apply, depending on fire loading, sprinkler location, and other 
requirements of the Authority Having Jurisdiction. Refer to specific installation standards.
3 The corrosion-resistant coatings have passed the standard corrosion test required by the 
approving agencies indicated in the Approval Chart on page 18 b. These tests cannot and 
do not represent all possible corrosive environments. Prior to installation, verify through 
the end-user that the coatings are compatible with or suitable for the proposed environment. The coatings indicated are applied to the exposed exterior surfaces only and, 
therefore, the sprinklers cannot be used as open sprinklers.
Note: The spring is exposed on sprinklers with Polyester finishes.
Table 1
1. PRODUCT NAME
Viking Standard Response Fusible Link 
Upright and Pendent Sprinklers 
2. MANUFACTURER
THE VIKING CORPORATION
210 N. Industrial Park Road
Hastings, Michigan 49058, U.S.A.
Telephone: (269) 945-9501
 (877) 384-5464
Fax: (269) 945-9599
e-mail: techsvcs@vikingcorp.com
3. PRODUCT DESCRIPTION
Viking Standard Response Fusible Link 
Upright and Pendent Sprinklers are 
small thermosensitive solder link spray 
sprinklers. The sprinklers are available 
with various finishes, temperature ratings, and K-Factors to meet design 
requirements. The rugged fusible link 
is compact and fully contained within 
the sprinkler frame to provide maximum 
protection from mechanical damage 
while still being aesthetically pleasing.
Used in conjunction with wax coating for 
corrosion resistance, the units provide 
protection against many corrosive environments. The seal at the base of the 
sprinkler frame is held in place by force 
transmitted from the compression screw, 
through the fusible link assembly, onto 
the pip cap and special sealing spring. 
During fire conditions, the heat-sensitive 
fusible link disengages, the pip cap and 
spring are released, and the waterway 
is opened. Water flowing through the 
sprinkle orifice strikes the sprinkler deflector, forming a uniform spray pattern 
to extinguish or control the fire.
4. TECHNICAL DATA
LISTINGS AND APPROVALS
Refer to the Approval Chart on pg 18 b.
Minimum Operating Pressure: 7 psi 
(48,3 kPa).
Rated 175 psi (1 207 kPa) water working pressure.
Factory tested hydrostatically to 500 psi 
(3 448 kPa).
SPRINKLER MATERIALS
Frame: Brass Castings UNS-C84400
Deflector: Copper UNS-C19500 for Part 
Nos. 05506, 05508, 05514, 05516, 
05557, 05576, and 05578. Brass 
UNS-C26000 for all other Part Nos.
Fusible Link Assembly: Brass UNS- 
C40500 and UNS-C51000
NOTE: For chrome sprinklers, the fusible link assembly is painted silver for 
decorative purposes only.
Bushing (for Sprinkler Base Part Nos. 
05569, 05570, 05574, and 05575): 
Brass UNS-C36000
Belleville Spring Sealing Assembly: STANDARD RESPONSE 
FUSIBLE LINK UPRIGHT 
AND PENDENT SPRINKLERS
TECHNICAL DATA
March 24, 2006
Approval Chart
Standard Response Fusible Link
Upright and Pendent Sprinklers
Maximum 175 PSI WWP
Base Part 
Number1
SIN Sprinkler 
Style
Thread Size Nominal
K-Factor Overall Length Listings and Approvals3
NPT BSP U.S. metric2
Inches mm cULus4
FM NYC5
VdS LPCB
Standard Orifice
05557 VK108 Upright 1/2” 15 mm 5.6 8,1 2-3/16 56 A5, C3 B4 A5, C3 -- --
05508 VK110 Pendent 1/2” 15 mm 5.6 8,1 2-3/16 56 A5, C3, C5X B4 A5, C3, C5X A1, C1X --
05506 VK108 Upright -- 15 mm 5.6 8,1 2-1/4 58 A5, C3 B4 A5, C3
Large Orifice
05514 VK204 Upright 3/4” 20 mm 8.0 11,5 2-5/16 59 A5, C3 B4 A1, C3 A1 --
05516 VK206 Pendent 3/4” 20 mm 8.0 11,5 2-5/16 59 A1, C3, C1X -- A1, C3, C1X A1, C1X --
05578 VK206 Pendent 1/2” 15 mm 8.0 11,5 2-5/16 59 A1, C3, C1X -- A1, C3, C1X A1, C1X --
05576 VK204 Upright 1/2” 15 mm 8.0 11,5 2-5/16 59 A5, C3 -- A1, C3 -- --
Small Orifice6
055707
VK007 Pendent 1/2” 15 mm 2.8 4,0 2-1/4 59 A1, C3, C1X D2 A1, C3, C1X -- --
055697
VK005 Upright 1/2” 15 mm 2.8 4,0 2-1/4 58 A1, C3 D2 A1, C3 -- --
055747
VK006 Upright 1/2” 15 mm 4.2 6,0 2-1/4 58 A1, C3 -- A1, C3 -- --
055757
VK008 Pendent 1/2” 15 mm 4.2 6,0 2-5/16 59 A1, C3, C1X -- A1, C3, C1X -- --
05510 VK006 Upright -- 10 mm 4.2 6,0 2-3/16 56 -- -- -- A1 --
05512 VK008 Pendent -- 10 mm 4.2 6,0 2-3/16 56 -- -- -- A1, C1X --
Approved Temperature Ratings
A - 165 °F (74 °C), 220 °F (104 °C), and 286 °F 
(141 °C)
B - 165 °F (74 °C) and 286 °F (141 °C)
C - 165 °F (74 °C) and 220 °F (104 °C)
D - 165 °F (74 °C)
Approved Finishes
1 - Brass and Chrome-Enloy®
2 - Brass
3 - Wax-Coated Brass (corrosion resistant)
4 - Brass and White Poly Finish
5 - Brass, Chrome-Enloy®, White Poly Finish8
and Black Polyester8
Approved Escutcheons
X - Standard surface-mounted escutcheons or the Microfast® Model F-1 
Adjustable Escutcheon, or Recessed 
with the Micromatic® Model E-1 or E-2 
Recessed Escutcheon
Footnotes
1 Base part number is shown. For complete part number, refer to Viking’s current price schedule.
2 Metric K-Factor shown is for use when pressure is measured in kPa. When pressure is measured in BAR, multiply the metric K-Factor 
shown by 10.0.
3 This chart shows the listings and approvals available at the time of printing. Other approvals may be in process. Check with the manufacturer 
for any addition approvals.
4 Listed by Underwriters Laboratories Inc. for use in the U.S. and Canada. 
5 Accepted for use, City of New York Department of Buildings, MEA Number 89-92-E, Vol. 3. 
6 Listings and Approvals are limited to Light-Hazard Occupancies where allowed by the installation standards being applied, with hydraulically 
calculated wet systems only.
7 The sprinkler orifice is bushed.
8 cULus Listed as corrosion-resistant.
Sprinkler 18 b
Replaces page 18 a-b, dated March 4, 2005 (updated the approval chart). Refer to 
page SR1-2 for general care, installation, and maintenance information.
Form No. F_030492