Viking MICROFAST VK352 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 with various finishes and tem-
perature ratings 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, these coatings have been investigated for installation
in corrosive environments and are listed/approved as indicated in the Approval
Charts.
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
FM Approved: Class Series 2000
VdS Approved: Certificates G414019, G414020, G4040097, G4060056,
and G4060057
LPCB Approved: Certificate 096e/03
CE: Standard EN 12259-1,DOP Sprinklers_VdS_23-5-13, DOP Sprinklers_LPCB_5-2-19 & DOP_VK352ENT_6-11-19
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 reqeust.
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)
Factory tested hydrostatically to 500 psi (34.5 bar)
Thread size: 3/4" NPT, 20 mm BSPT
Nominal K-Factor: 8.0 U.S. (115.2 metric**)
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
Overall Length: 2-1/4" (58 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: Phosphor Bronze UNS-C51000 or 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 Pipcap - ENT plated.
Ordering Information: (Also refer to the current Viking price list.)
Order Quick Response Upright and Pendent 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, Black PTFE = N, and ENT = JN
Temperature Suffix: 135 °F (57 °C) = A, 155 °F (68 °C) = B, 175 °F (79 °C) = D, 200 °F (93 °C) = E, 286 °F (141 °C) = G
For example, sprinkler VK352 with a Brass finish and a 155 °F (68 °C) temperature rating = Part No. 18258AB
Available Finishes And Temperature Ratings: Refer to Table 1.
Form No. F_033414 Rev 02
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Quick Response Pendent Sprinkler VK352 is a small
®
April 2023
TECHNICAL DATA
MICROFAST QUICK
®
RESPONSE PENDENT
SPRINKLER VK352 (K8.0)
Replaces Form F_033414 Rev 01
(added venting statement.)
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