QUICK RESPONSE
EXTRA-LARGE ORIFICE
UPRIGHT SPRINKLER
VK531 (STORAGE-DENSITY/AREA)
TECHNICAL DATA
Form No. F_120699 18.10.11 Rev 18.2.P65
Page 2 of 5
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: [email protected]
Visit the Viking website for the latest edition of this technical data page: www.vikinggroupinc.com
Finish Suffix: Brass = A, Chrome = F, White Polyester = M-/W, Black Polyester = M-/B, ENT = JN
Temperature Suffix: 155 °F (68 °C) = B, 175 °F (79 °F) = D, 200 °F (93 °C) = E, 286 °F (141 °C) = G, OPEN = Z (PTFE only).
For example, sprinkler VK531 with a Brass finish and a 155 °F (68 °C) temperature rating = Part No. 10633AB
Available Finishes And Temperature Ratings:
Refer to Table 1.
Accessories:
(Also refer to the Viking website.)
Sprinkler Wrenches:
A. Standard Wrench: Part No. 05118CW/B (available since 1981).
B. Wrench for coated sprinklers: Part No. 11663W/B** (available since 2001)
**A ½” ratchet is required (not available from Viking).
Sprinkler Cabinets:
A. Six-head capacity: Part No. 01724A (available since 1971)
B. Twelve-head capacity: Part No. 01725A (available since 1971)
4. INSTALLATION
Refer to appropriate NFPA Installation Standards.
5. OPERATION
During fire conditions, when the temperature around the sprinkler reaches its operating temperature, the heat-sensitive liquid in
the glass bulb expands, causing the bulb to shatter, releasing the pip cap and sealing spring assembly. Water flowing through the
sprinkler orifice strikes the sprinkler deflector, forming a uniform spray pattern to extin- guish or control the fire.
6. INSPECTIONS, TESTS AND MAINTENANCE
Refer to NFPA 25 for Inspection, Testing and Maintenance requirements.
7. AVAILABILITY
The Viking Quick Response Extra-Large Orifice Upright Sprinkler is available through a network of domestic and international dis-
tributors. 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.
TABLE 1: AVAILABLE SPRINKLER TEMPERATURE RATINGS AND FINISHES
Sprinkler Temperature
Classification
Sprinkler Nominal
Temperature Rating
1
Maximum Ambient
Ceiling Temperature
2
Bulb Color
Ordinary
155 °F (68 °C)
100 °F (38 °C)
Red
Intermediate
175 °F (79 °C)
150 °F (65 °C)
Yellow
Intermediate
200 °F (93 °C)
150 °F (65 °C)
Green
High
286 °F (141 °C)
225 °F (107 °C)
Blue
Sprinkler Finishes:
Brass, Chrome, White Polyester, Black Polyester, and ENT
Corrosion-Resistant Coatings
3
:
White Polyester, and Black Polyester in all temperature ratings. ENT in all temperature ratings
except 135°F (57°C).
Footnotes
1
The sprinkler temperature rating is stamped on the deflector.
2
Based on NFPA-13. 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 Charts. These
tests cannot and do not represent all possible corrosive environments. Prior to installation, verify through the end-user that the coatings are compat-
ible with or suitable for the proposed environment. For automatic sprinklers, the coatings indicated are applied to the exposed exterior surfaces only.
Note that the spring is exposed on sprinklers with Polyester, and ENT. For all ENT coated sprinklers, the waterway is coated.
