Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
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1. DESCRIPTION
The Viking Standard Response ELO Pendent Sprinkler VK536 is a thermosensitive
glass bulb spray sprinkler available in several different finishes and temperature rat-
ings 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 corrosive atmos-
pheres and are listed/approved as corrosion resistant as indicated in the Approval
Charts.
The extra-large orifice provides greater flows at lower pressures than standard orifice or
large orifice sprinklers. This feature allows reduced pipe sizing for hydraulically calculated
sprinkler systems, which require high densities of water. Viking Standard Response Extra-
Large Orifice Sprinklers may eliminate the need for a fire pump or reduce the size of the
pump if it is required. On existing systems, replacing large orifice sprinklers with extra-large
orifice sprinklers may provide the higher densities required to allow an increase in the hazard
classification of an occupancy.
Viking standard response sprinklers may be ordered and/or used as open sprinklers (glass
bulb and pip cap assembly removed) on deluge systems. Refer to
below.
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
FM Approved: Class 2009
NYC Approved: MEA 89-92-E, Volume 3
Refer to Approval Charts and Design Criteria for requirements that must be followed.
3. TECHNICAL DATA
Specifications:
Available since 1992.
Maximum Working Pressure: 175 psi (12 bar). Factory tested hydrostatically to 500 psi (34.5 bar).
Thread size: 3/4" NPT or 20 mm BSP
Nominal K-Factor: 11.2 U.S. (161.3 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: 2-5/16" (58.7 mm)
Material Standards:
Sprinkler Frame: Brass UNS-C84400
Deflector: Brass UNS-C51000
Bulb: Glass, nominal 5 mm diameter
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
Compression Screw: Brass UNS-C36000
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
For Polyester Coated Sprinklers: Belleville Spring-Exposed
For ENT Coated Sprinklers: Belleville Spring-Exposed, Screw and Pipcap-ENT plated
Ordering Information:
Order Standard Response Extra-Large Orifice Pendent Sprinkler VK536 by first adding the appropriate suffix for the sprinkler fin-
ish 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, Wax Coated = C, and ENT = JN
Form No. F_072213
22.04.14
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
)
*
(Also refer to the current Viking price list.)
Rev 22.1
STANDARD RESPONSE
ELO PENDENT SPRINKLER
(STORAGE-DENSITY/AREA)
Ordering Instructions
Replaces Form No. F_072213 Rev 21.1
(Updated FM references to non-storage sprinklers.)
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VK536
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