Viking VK352-D Technical Data Manual

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
1. DESCRIPTION
Viking Standard/Quick Response Concealed Pendent Sprinkler VK352 is a thermo-
sensitive glass bulb spray sprinkler pre-assembled with a threaded adapter for instal-
lation with a domed cover that provides up to ½" (13 mm) of vertical adjustment. The
cover plate is available with several decorative finishes to meet design requirements.
The Electroless Nickel PTFE (ENT) finish has been investigated for installation in
corrosive environments and is listed/approved as indicated in the Approval Charts.
The ENT finish is only available for the sprinkler assembly, the cover plate is not
plated.
The two-piece design allows installation and testing of the sprinkler prior to instal-
lation of the cover plate. The "push-on", "thread-off" design of the concealed cover
plate assembly allows easy installation of the cover plate after the system has been
tested and the ceiling finish has been applied. The cover assembly can be removed
and reinstalled, allowing temporary removal of ceiling panels without taking the sprin-
kler system out of service or removing the sprinkler.
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
FM Approved: Class 2015
Refer to the 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 sizes: 3/4" (20 mm) NPT
Nominal K-Factor: 8.0 U.S. (115.2 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 (sprinkler body): 2-5/16" (59 mm)
Material Standards:
Frame Casting: Brass UNS-C84400 VK352.
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
Ejector Spring: 17-7 Stainless Steel
Compression Screw: Brass UNS-C36000
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
Cover Adapter: Cold Rolled Steel UNS-G10080, Finish: Clear Chromate over Zinc Plating
Cover Assembly Materials:
Cover Plate Assembly: Copper UNS-C11000 and Brass UNS-C26800
Spring: Beryllium Nickel
Solder: Eutectic
Ordering Information: (Also refer to the current Viking price list.)
NOTE: Viking Standard/Quick Response Concealed Pendent Sprinkler VK352 and cover plate assembly must be ordered separately.
Sprinkler: Order Viking Standard/Quick Response Concealed Pendent Sprinkler VK352 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 Suffixes: A = Brass, JN = ENT
Specify sprinkler temperature rating by adding the appropriate suffix for the temperature rating to the base part number:
Temperature Suffix: 155 °F (68 °C) = B, 175 °F (79 °C) = D, 200 °F (93 °C) = E
For example, concealed sprinkler VK352 with a 155 °F (68 °C) temperature rating = 06666BABX.
NOTE: When ordering this sprinkler using the SIN, add suffix -D. For example, concealed sprinkler VK352 = VK352-D.
Cover Plate Assembly: Base Part No. 12381
Form No. F_102112 Rev 01
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Visit the Viking website for the latest edition of this technical data page.
September 2023
STANDARD/QUICK
RESPONSE
CONCEALED PENDENT
SPRINKLER VK352-D (K8.0)
Replaces Form No. F_102112 19.2
(Updated 135F cover plate temp. to 139F.)
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