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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 Standard Response Upright Sprinkler VK598 is a thermosensitive glass bulb
spray sprinkler available in various temperature ratings to meet design requirements.
The 25.2 nominal K-Factor provides greater flows at lower pressures to protect higher
ceiling and storage heights.
For specific application details, refer to applicable FM Global Loss Prevention Data
Sheets and the FM tables and charts within this Technical Data Sheet, or to the latest
edition of NFPA 13.
2. LISTINGS AND APPROVALS
FM Approved: Class 2029
Refer to Approval Chart and Design Criteria for FM Approval requirements
that must be followed.
Approved for use in FM Approved vacuum dry sprinkler systems with a
maximum supervisory vacuum pressure of -3 psi (-207 mbar).
3. TECHNICAL DATA
Specifications:
Available since 2014
Maximum Working Pressure: 175 psi (12 bar).
Factory tested hydrostatically to 500 psi (34.5 bar).
Thread size: 1" NPT or 25 mm BSPT
Nominal K-Factor: 25.2 U.S. (363 metric)
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
Overall Length: 3-1/4" (83 mm)
Material Standards:
Sprinkler Frame: Brass UNS-C84400
Deflector: Phosphor Bronze UNS-C51000
Bulb: Glass, nominal 5 mm diameter
Pip Cap: Copper UNS-C11000 and Stainless Steel UNS-S30400
Compression Screw: Stainless Steel UNS-S31603 or ENT coated Brass UNSC36000
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Ordering Information: Refer to Table 1
4. INSTALLATION
Refer to appropriate NFPA, FM Global, and/or any other applicable installation standards.
NOTICE
Risk of permanent damage.
Over-tightening the sprinkler can cause permanent damage.
> Tighten the sprinkler to a MAXIMUM torque of 30 ft-lbs. (40.7 Nm).
5. OPERATION
During fire conditions, when the temperature around the sprinkler reaches its operating temperature, the heat-sensitive liquid in
the glass bulb expands, causing the bulb to shatter, releasing the pip cap and sealing spring assembly. Water flowing through the
sprinkler orifice strikes the sprinkler deflector, forming a uniform spray pattern to extinguish or control the fire.
6. INSPECTIONS, TESTS AND MAINTENANCE
Refer to the appropriate standard, FM 2-81, NFPA 25, or equivalent for Inspection, Testing, and Maintenance requirements.
7. AVAILABILITY
The Viking Model VK598 Sprinkler is 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.
Form No. F_090414
Rev 22.2
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
February 2023
STANDARD RESPONSE
UPRIGHT SPRINKLER
VK598 (K25.2)
Replaces Form No. F_090414 Rev 22.1
(Updated FM references to non-storage sprinklers.)
Page 1 of 4
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Summary of Contents for Viking VK598
- Page 1 Refer to the appropriate standard, FM 2-81, NFPA 25, or equivalent for Inspection, Testing, and Maintenance requirements. 7. AVAILABILITY The Viking Model VK598 Sprinkler is available through a network of domestic and international distributors. See The Viking Corporation web site for the closest distributor or contact The Viking Corporation.
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Page 2: Technical Data
High 225 °F (110 °C) Example: 19522AB = VK598 with Brass Finish and 155 °F (68 °C) Nominal temperature rating. This sprinkler is to be installed into an area with a maximum ambient tempe- rature of 100 °F (40 °C) meaning if the area will experience temperatures above the maximum ambient rating, you shall use a higher temperature-rated sprinkler. - Page 3 This table shows the listings and approvals available at the time of printing. Other approvals may be in process. 9.1 FM Approval Categories • Sprinkler VK598 is FM Approved as a Standard response Storage upright sprinkler as indicated in the FM Approval Guide. Refer to design criteria below.
- Page 4 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 TABLE 3: COMMODITY SELECTION AND DESIGN CRITERIA OVERVIEW FOR MODEL VK598...
- Page 5 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 6 * 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 7 • 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 8 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 9: 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 10 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 11 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 12: 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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