
EXTENDED COVERAGE
UPRIGHT SPRINKLER VK595 (K25.2)
(CMDA/CMSA)
TECHNICAL DATA
Form No. F_121610 22.04.14 Rev 22.1
Page 3 of 4
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Approval Chart 1 (UL)
Standard Response Extended Coverage Upright Sprinkler VK595 (K25.2)
Maximum 175 PSI (12 Bar) WWP
Base Part
Number1SIN Sprinkler
Style
Thread Size Nominal K-factor Overall Length Listings and Approvals3
(Refer also to Design Criteria below.)
NPT BSP U.S. metric2Inches mm cULus4NYC
16859 VK595 Upright 1” -- 25.2 363 3-3/4” 95.3 A1 See Footnote 5.
16885 -- 25 mm
Approved Temperature Ratings
A - 165 °F (74 °C) and 212 °F (100 °C)
Approved Finish
1 - Brass
Footnotes
1 Base part number shown. For complete part number, refer to Viking’s current price schedule.
2 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.
3 This table shows the listings and approvals available at the time of printing. Other approvals may be in process.
4 Listed by Underwriters Laboratories Inc. for use in the U.S. and Canada.
5Meets New York City requirements, effective July 1, 2008.
DESIGN CRITERIA - UL
(Also refer to Approval Chart 1 above.)
cULus Listing Requirements:
Sprinkler VK595 is cULus Listed as a standard response extended coverage upright sprinkler for storage protection, for installation in accordance with
the latest edition of NFPA 13 and in conjunction with the following guidelines:
• System types: Wet, Dry and Preaction systems are acceptable.
• Suitable for the protection of extra hazard and high-piled storage occupancies where area/density design criteria is provided.
• Suitable for “unobstructed” or “noncombustible obstructed” construction.
• Sprinkler VK595 has been specifically tested and listed for noncombustible obstructed construction and are suitable for use within trusses or
bar joists having noncombustible web members greater than 1 inch (25.4 mm) when applying the 4 times obstruction criteria rule defined under
“Obstructions to Sprinkler Discharge Pattern Development”.
• The maximum area of coverage per sprinkler is 196 sq. ft. (18.2 sq. m). The maximum distance between sprinklers is 14 feet (4.3 m). The minimum
distance between sprinklers is 8 feet (2.44 m). For a protection area of 144 sq. ft. (13.3 sq. m), the maximum distance between sprinklers is 15
feet (4.5 m) per NFPA 13, Table 8.8.2.1.2.
• The minimum flow requirement is to be based on the design density applied over the actual area of coverage per sprinkler.
• The minimum clearance between the deflector and the top of storage is 36 inches (0.9 m). For clearances of 36 inches (0.9 m) up to 48 inches
(1.21 m), the minimum design pressure is 22 psi (1.52 bar). For clearances of 48 inches (1.21 m) and greater, the minimum design pressure is
established by the minimum flow requirement [however, the pressure can never be less than 7 psi (.5 bar)].
• The ordinary and intermediate temperature rated VK595 sprinklers have been investigated for use in high-piled storage occupancies at the hy-
draulic demand normally associated with high temperature sprinklers. As such, the VK595 sprinklers are listed storage sprinklers having a K-factor
greater than 11.2 and having ordinary and intermediate temperature ratings (that is, 165 °F and 212 °F). Consequently, the VK595 Sprinklers, in
accordance with the latest edition of NFPA 13, may be used in conjunction with the density curves for high temperature sprinklers specified in the
latest edition of NFPA 13.
• Sprinkler VK595 complies with the criterion for the protection of retail stores as described in section 20.3 of NFPA 13.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Form No. F_080614
for general care, installation, and maintenance information. Viking sprinklers are to be installed in accordance with the latest
edition of Viking technical data, the appropriate standards of NFPA, LPCB, APSAD, VdS or other similar organizations, and
also with the provisions of governmental codes, ordinances, and standards, whenever applicable.