Viking MICROFAST VK610 Technical Data Manual

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com.
1. DESCRIPTION
The Viking Microfast
thermosensitive spray sprinkler available in several different finishes and tempera-
ture ratings to meet varying design requirements. These sprinklers have both stand-
ard response and quick response listings. The fast response type glass bulb and
special deflector combine speed of operation and area of coverage to meet quick
response extended coverage standards.
The special Polyester and Electroless Nickel PTFE (ENT) coating can be used in
decorative applications where colors are desired. The ENT coating has been inves-
tigated for installation in corrosive environments and is approved as indicated in the
approval chart.
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
Refer to the Approval Chart(s) and Design Criteria for Listing and/or Approval re-
quirements that must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: Refer to the Approval Chart.
Maximum Working Pressure: 250 psi (17 bar) wwp.
Factory tested hydrostatically to 500 psi (34.5 bar).
Testing: U.S.A. Patent No. 4,831,870
Thread size: 1/2" (15 mm) NPT
Nominal K-Factor: 5.6 U.S. (80.6 metric
* Metric K-factor measurement shown is when pressure is measured in Bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
Overall Length: 2-1/4 (58 mm)
Material Standards:
Sprinkler Frame: Brass UNS-C84400
Deflector: Brass UNS-C26000
Bulb: Glass, nominal 3 mm diameter
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Screw: Brass UNS-C36000
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
For ENT Coated Sprinklers: Belleville Spring-Exposed, Screw and Pip Cap-ENT Coated
For Polyester Coated Sprinklers: Belleville Spring-Exposed
Ordering Information:
Order Viking Microfast
then the appropriate suffix for the temperature rating to the sprinkler base part number.
Finish Suffix: Brass = A, Chrome = F, White Polyester = M-/W, and Black Polyester = M-/B, and ENT = JN
Temperature Suffix (°F/°C): 135°/57° = A, 155°/68° = B, 175°/79° = D
For example, sprinkler VK610 with a Brass finish and a 155 °F/68 °C temperature rating = Part No. 12294AB
Available Finishes And Temperature Ratings: Refer to Table 1
Accessories: (Also refer to the Viking website.)
Sprinkler Wrenches:
A. Standard Wrench: Part No. 21475M/B (available since 2017)
B. Socket Wrench for recessed pendent sprinklers: Part No. 13577W/B
**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)
Form No. F_022098 19.09.23
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
EC/QREC Pendent HP Sprinkler VK610 is a small
®
)
*
(Also refer to the current Viking price list.)
EC/QREC Pendent HP Sprinkler VK610 by first adding the appropriate suffix for the sprinkler finish and
®
Rev 19.2
TECHNICAL DATA
(available since 2006)
**
MICROFAST SR/QR
®
EXTENDED COVERAGE
PENDENT HP SPRINKLER
VK610 (K5.6)
For Light Hazard Occupancies Only
Replaces Form No. F_022098 Rev 19.1
Page 1 of 5
(Added ENT.)