VK1181 STANDARD
RESPONSE CONVENTIONAL
SPRINKLER (K5.6)
TECHNICAL DATA
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: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
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Form No. F_102518 Rev 22.1 March 3, 2022
1. DESCRIPTION
The Viking Standard Response Conventional VK1181 Sprinklers are small,
thermosensitive, glass-bulb spray sprinklers available in several different finishes,
temperature ratings, and K-factors to meet design requirements. The special Polyester,
and Electroless Nickel Polytetrafluoroethylene (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 as indicated in the Approval
Chart.
Standard Response sprinklers may be ordered and/or used as open sprinklers
(glass bulb and pip cap assembly removed) on deluge systems. Refer to Ordering
2. LISTINGS AND APPROVALS
cULus Listed:
Category VNIV
LPCB Approved
reference no. 096m
Refer to the Approval Chart and Design Criteria for Listing requirements that must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: 7 psi (0.5 bar)
Rated to: 175 PSI (12 bar)
Factory tested hydrostatically to 500 psi (34.5 bar)
Thread size: 1/2” NPT or 15 mm BSPT
Nominal K-factor: 5.6 U.S. (80.6 metric**)
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
** 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.
Material Standards:
Sprinkler Body: Brass CW602N, UNS-C84400 or QM Brass
Deflector: Stainless Steel UNS S30400
Pip Cap Shell - Stainless Steel UNS-S44400
Pip Cap Disc - Stainless Steel UNS-S30100
Belleville Spring - Nickel Alloy
Pip Cap Seal - Polytetrafluoroethylene (PTFE)
Compression Screw: Brass CW612N, CW508L, UNS-C36000 or UNS-C26000
Shipping Cap: Polyethylene
Bulb: Glass, nominal 5 mm diameter
Ordering Information:
(Refer to Table 1 and the current Viking List Price Book)
4. INSTALLATION
Refer to appropriate NFPA 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 14 ft-lbs. (19.0 N-m).
5. OPERATION
During fire conditions, the heat-sensitive liquid in the glass bulb expands, causing the glass 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 NFPA 25 for Inspection, Testing and Maintenance requirements.
7. AVAILABILITY
The Model VK1181 Sprinkler is available through a network of domestic and international distributors. See the web site for the
closest distributor or contact Viking.
8. GUARANTEE
For details of warranty, refer to the current list price schedule or contact us directly.
Replaces Form No. F_102518 Rev 21.1
(Added LPCB details, removed CE.)
