Viking VK333 Technical Data Manual

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 Horizontal Sidewall Sprinkler VK333 is
a small thermosensitive glass bulb spray sprinkler available with various finishes
and temperature 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
Refer to Approval Chart 1 and Design Criteria for cULus Listing 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)
Nominal K-Factor: 2.8 U.S. (40.3 metric*)
Thread size: 1/2" NPT, 15 mm BSPT
* 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: 2-3/4" (68 mm)
Material Standards:
Frame Casting: Brass UNS-C84400
Deflector: Copper UNS-C19500
Bushing: Brass UNS-C36000
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: 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 Plated
Ordering Information: (Also refer to the current Viking price list.)
Order Viking Microfast® Quick Response Horizontal Sidewall Sprinkler VK333 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 VK333 with a Brass finish and a 155 °F/68 °C temperature rating = Part No. 10035AB
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. Wrench for recessed sprinklers with protective shields: Part No. 13655W/B** (available since 2003)
**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_062014 21.03.05
TECHNICAL DATA
Rev 21.1
MICROFAST QUICK
®
RESPONSE HORIZONTAL
SIDEWALL SPRINKLER
VK333 (K2.8)
For Light Hazard Occupancies Only
Replaces form F_062014 Rev. 20.1
(Removed bushed part numbers)
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