MICROFAST
®
QUICK
RESPONSE UPRIGHT
SPRINKLER VK345 (K5.6)
TECHNICAL DATA
Page 1 of 4
Form No. F_033114 19.11.15 Rev 19.3
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: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page: www.vikinggroupinc.com
1. DESCRIPTION
The Viking Microfast
®
Quick Response Upright Sprinkler VK345 is a small,
thermosensitive, glass-bulb spray sprinkler available in several different finishes, tem-
perature ratings, and K-factors to meet design requirements. The special Polyester
and Electroless Nickel PTFE (ENT) coatings can be used in decorative applications
where colors are desired. In addition, the ENT coating has been investigated for instal-
lation in corrosive environments and is listed/approved as indicated in the Approval
Charts.
2. LISTINGS AND APPROVALS
FM Approved:
Class Series 2000
VdS Approved:
Certificates G414011 and G4880046
LPCB Approved:
Certificate 096e/04
CE Certified:
Standard EN 12259-1, EC-certificate of constancy of per-
formance 0832-CPR-S0021
China Approval:
Approved according to China GB standard
MED Certified:
Standard EN 12259-1, EC-certificate of conformity 0832-MED-1003
NOTE:
Other International approval certificates are available upon request.
Refer to the Approval Chart(s) and Design Criterion 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: 15 mm BSPT
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
Deflector: Copper UNS-C19500
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 Pip Cap-ENT Coated
Ordering Information:
(Also refer to the current Viking price list.)
Order Microfast
®
and MicrofastHP
®
Quick Response Upright and Conventional Sprinklers by first adding the appropriate suffix for
the sprinkler finish and 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 VK345 with a 15 mm thread, Brass finish and a 155 °F/68 °C temperature rating = Part No. 12984AB
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 2000)
Sprinkler Cabinets:
A. Six-head capacity: Part No. 01724A (available since 1971)
B. Twelve-head capacity: Part No. 01725A (available since 1971)
Replaces Form No. F_033114 Rev 19.2
(Revised China Approval; removed 19783.)
