Viking MICROFAST VK300 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, glass-bulb spray sprinkler available in several differ-
ent finishes and temperature ratings to meet design requirements. The spe-
cial Polyester and Electroless Nickel PTFE (ENT) coatings can be used in
decorative applications where colors are desired. In addition, these coat-
ings have been investigated for installation in corrosive atmospheres and
are listed/approved as corrosion resistant as indicated in the Approval
Charts.
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
FM Approved: Classes 2002 and 2020
Refer to Approval Charts and Design Criteria for listing and approval requirements
that must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: 7 psi (0.5 bar)*
Maximum Working Pressure: 175 psi (12 bar) wwp.
Factory tested hydrostatically to 500 psi (34.5 bar)
Testing: U.S.A. Patent No. 4,831,870
Thread size: 1/2" NPT, 15 mm BSP
Nominal K-Factor: 5.6 U.S. (80.6 metric**)
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
Overall Length: 2-3/16" (56 mm)
*cULus Listing, FM Approval, and NFPA 13 installs require a minimum of 7 psi (0.5 bar). The minimum operating pressure for LPCB and CE
Approvals ONLY is 5 psi (0.35 bar).
Material Standards:
Frame Casting: Brass UNS-C84400 or QM Brass
Deflector: Brass UNS-C23000 or Phosphor Bronze UNS-C51000
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 Polyester Coated Sprinklers: Belleville Spring-Exposed
For ENT Coated Sprinklers: Belleville Spring-Exposed, Screw and Pipcap - ENT plated
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, Black Polyester = M-/B, and ENT = JN
Temperature Suffix (°F/°C): 135°/57° = A, 155°/68° = B, 175°/79° = D, 200°/93° = E, and 286°/141° = G
For example, sprinkler VK300 with a 1/2" NPT thread, Brass finish and a 155 °F/68 °C temperature rating = Part No. 12978AB
Available Finishes And Temperature Ratings: Refer to Table 1.
Accessories: (Also refer to the Viking website.)
Sprinkler Wrench: Standard Wrench: Part No. 21475M/B (available since 2017)
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.
Form No. F_052114 Rev 01
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Quick Response Upright Sprinkler VK300 is a small,
®
(Also refer to the current Viking price list.)
Quick Response Upright Sprinkler VK300 by first adding the appropriate suffix for the sprinkler finish and
®
August 2023
TECHNICAL DATA
MICROFAST QUICK
®
RESPONSE UPRIGHT
SPRINKLER VK300 (K5.6)
Replaces Form No. F_052114 Rev 19.1
(updated material specifications.)
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