MICROFAST
®
QUICK
RESPONSE UPRIGHT
SPRINKLER VK3271 (K4.2)
TECHNICAL DATA
Page 2 of 3
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.
Form No. F_061614 18.11.05 Rev 17.2.P65
5. OPERATION
During fire conditions, the heat-sensitive liquid in the glass bulb expands, causing the glass 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 extinguish or control the fire.
6. INSPECTIONS, TESTS AND MAINTENANCE
Refer to NFPA 25 for Inspection, Testing and Maintenance requirements.
7. AVAILABILITY
The Viking Microfast
®
Quick Response Upright Sprinkler VK3271 is available through a network of domestic and international distribu-
tors. 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
135 °F (57 °C)
100 °F (38 °C)
Orange
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, and Black Polyester
Corrosion-Resistant Coatings
3
:
White Polyester and Black Polyester
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 coatings.
Figure 1:
Standard Sprinkler Wrench 21475M/B
Protective Sprinkler Cap
Wrench Flat
