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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
Viking Quick Response Concealed Horizontal Sidewall Sprinkler VK481 is a small
solder link and lever spray sprinkler designed for installation on concealed pipe
systems. The sprinkler is hidden from view by a low profile, small diameter cover plate
installed flush with the wall.
The two-piece design allows installation and testing of the sprinkler prior to
installation of the cover plate. The "push-on", "pull-off" design of the concealed
cover plate assembly allows easy installation of the cover plate after the system
has been tested and finish has been applied to the wall, while also permitting up to
¼" (6.4 mm) of horizontal adjustment. The cover assembly can be removed and
reinstalled, allowing access behind the wall without taking the sprinkler system out
of service and 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:
Available since 2012.
Minimum Operating Pressure: 7 psi (0.5 bar)
Rated to 175 psi (1 207 kPa) water working pressure.
Thread size: 1/2" (15 mm) NPT
Nominal K-Factor: 5.6 U.S. (80.6 metric
† Metric K-factor measurement is shown in Bar. When pressure is measured in kPa, divide the metric
K-factor shown by 10.0.
Available Cover Plate Horizontal Adjustment: 1/4" (6.4 mm)
Overall Length (Sprinkler Body): 2" (50 mm)
Covered by the following U.S. Patent numbers: 7,854,269 and 7,712,218
Material Standards:
Sprinkler Body: QM Brass or Brass UNS-C84400
Belleville Spring Sealing Assembly: Nickel alloy, coated on both sides with PTFE tape
Seat: UNS-C31400 or Brass UNS-C31600, ENT coating available upon request
Deflector Ring: Brass UNS-C23000
Deflector Pins: Stainless Steel UNS-S30200
Halo: Phosphor Bronze UNS-C51000; e-coating available upon request
Flow Shaper: Phosphor Bronze UNS-C51000
Lever Bar Ring: Brass UNS-C84400 or Brass UNS-C31600
Compression Screw: 18-8 Stainless Steel
Fusible Link Assembly: Nickel alloy and Eutectic solder
Fusible Link Levers: Stainless Steel UNS-S31600
Guide Pin: Stainless steel UNS-S43000, ENT coating available upon request
Shipping Cap: Polyethylene
Cover Assembly Materials:
Cover Plate Assembly: Brass UNS-C26000 or UNS-C26800
Spring: Nickel Alloy
Solder: Eutectic
Form No. F_020312
Rev 01
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
)
†
September 2023
STANDARD SPRAY
CONCEALED HORIZONTAL
SIDEWALL SPRINKLER
VK481 (K5.6)
Replaces Form No. F_020312 Rev 22.1
(Updated 135F cover plate temp. to 139F.)
Page 1 of 6
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Summary of Contents for Viking VK481
- Page 1 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 Viking Quick Response Concealed Horizontal Sidewall Sprinkler VK481 is a small solder link and lever spray sprinkler designed for installation on concealed pipe systems.
-
Page 2: Technical Data
Refer to NFPA 25 for Inspection, Testing and Maintenance requirements. 7. AVAILABILITY Viking concealed sprinklers are available through a network of domestic and international distributors. See The Viking Corporation web site for the closest distributor or contact The Viking Corporation. - Page 3 Based on NFPA-13. Other limits may apply, depending on fire loading, sprinkler location, and other requirements of the Authority Having Jurisdiction. Refer to specific installation standards. Base part number is shown. For complete part number, refer to Viking’s current price list schedule. The internal design of the...
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Page 4: Design Criteria
(Also refer to the Approval Chart above.) cULus Listing Requirements: Quick Response Concealed Horizontal Sidewall Sprinkler VK481 is cULus Listed for installation in accordance with the latest edition of NFPA 13 for standard coverage sidewall spray sprinklers as indicated below: Designed for use in Light or Ordinary Hazard Occupancies. - Page 5 FM Approval Requirements Viking Standard Response Concealed HSW Sprinkler VK481 is FM Approved as a Non-Storage Sidewall sprinkler as indicated in the FM Approval Guide. For specific application and installation requirements, reference the latest applicable FM Loss Prevention Data Sheets (including Data Sheet 2-0).
- Page 6 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 CEILING Position with the centerline of the...
- Page 7 Refer to the appropriate technical data page and NFPA standards for complete care, handling, installation, and maintenance instructions. For additional product and system information Viking data pages and installation instructions are available on the Viking Web site at www.vikinggroupinc.com.
- Page 8 * Refer to the appropriate current technical data pages for complete care, handling, and installation instructions. Data pages are included with each shipment from Viking or Viking distributors. They can also be found on the Web site at www. vikinggroupinc.com.
- Page 9 • while ceiling finish work is being completed. Use only the designated Viking recessed sprinkler wrench (refer to the appropriate sprinkler data page) to install these sprinklers. NOTE: The protective cap is • temporarily removed during installation and then placed back on the sprinkler for protection until finish work is completed.
- Page 10 Take care not to crack the wax coating on the units. • For touching up the wax coating after installation, wax is available from Viking in bar form. Refer to Table 1 below. The coating MUST be repaired after •...
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Page 11: Listings And Approvals
1. DESCRIPTION Viking fire sprinklers consist of a threaded frame with a specific waterway or orifice size and a deflector for distributing water in a specified pattern. A closed or sealed sprinkler refers to a complete assembly, including the thermosensitive operating element. An open sprinkler does not use an operating element and is open at all times. - Page 12 TECHNICAL DATA SPRINKLER OVERVIEW 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 VERTICAL SIDEWALL (VSW) SPRINKLER: A sprinkler intended for installation near the wall and ceiling. The deflector provides a water spray pattern outward in a quarter-spherical pattern and can be installed in the upright or pendent position with the flow arrow in the direction of discharge.
- Page 13 Refer to NFPA 25 for Inspection, Testing and Maintenance requirements. 7. AVAILABILITY Viking sprinklers are available through a network of domestic and international distributors. See The Viking Corporation web site for the closest distributor or contact The Viking Corporation. 8. GUARANTEE For details of warranty, refer to Viking’s current list price schedule or contact Viking directly.
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Page 14: Warranty Terms And Conditions
For more information, go to www.P65Warnings.ca.gov 2. WARRANTY TERMS AND CONDITIONS For details of warranty, refer to Viking’s current list price schedule at www.vikinggroupinc.com or contact Viking directly. New Bulletin Form No. F_111218 18.11.15...
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