Viking MicrofastHP VK319 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 MicrofastHP® Quick Response Horizontal High Pressure Sidewall Sprinkler
VK319 is a small thermosensitive glass bulb spray sprinkler available with various fin-
ishes 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 cor-
rosive atmospheres and are listed/approved as corrosion resistant as indicated in 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: Sprinkler VK319 is rated for use with water working pressures ranging from the minimum 7
psi (0.5 bar) up to 250 psi (17 bar) for high-pressure systems. High-pressure (HP) sprinklers can be identified by locat-
ing "250" stamped on the deflector.
Factory tested hydrostatically to 500 psi (34.5 bar)
Nominal K-Factor: 5.6 U.S. (80.6 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: 2-3/4" (68 mm)
Material Standards:
Frame Casting: Brass UNS-C84400
Deflector: 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: Copper UNS-C11000 and Stainless Steel UNS-S30400
Pip Cap Attachment: Brass UNS-C36000
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 MicrofastHP® Quick Response Horizontal High Pressure Sidewall Sprinkler VK319 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 VK319 with a Brass finish and a 155 °F/68 °C temperature rating = Part No. 12282AB
Available Finishes And Temperature Ratings: Refer to Table 1.
Accessories: (Also refer to theViking website.)
Sprinkler Wrenches:
A. Standard Wrench: Part No. 21475MB (available since 2017).
B. Wrench for recessed sprinklers with protective shields: Part No. 13655WB** (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_030103 Rev 01
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
June 2023
MicrofastHP QUICK
®
RESPONSE HORIZONTAL
SIDEWALL HIGH PRESSURE
SPRINKLER VK319 (K5.6)
NOTE: As of May 2018 all logos have been
removed from the wrench boss.
Replaces form F_030103 Rev. 19.1
(Updated material specificationsl.)
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