Viking VK549 Manual

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
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1. DESCRIPTION
Viking Quick Response Dry Pendent Extra-Large Orifice (ELO) Sprinklers are
thermosensitive spray sprinklers suitable for use in areas subject to freezing.
These dry pendent ELO sprinklers are FM Approved for storage and non-storage
applications. In certain FM cold storage installations, the dry ELO sprinklers
can provide a design advantage with lower overall water demands. In these
applications, the dry ELO must be installed on a wet pipe system, per FM data
sheet 8-9. In non-storage applications, when used in dry or preaction systems,
the sprinklers are designed to prevent water or condensation from entering the
drop nipple before the sprinkler operates. Viking Quick Response Dry Pendent
ELO Sprinklers are available in various finishes and temperature ratings to meet
design requirements.
The optional dry sprinkler boot assembly is intended to slow the exchange of air
between the inside and outside of the freezer (or any dry sprinkler installation)
to help prevent humidity and temperature differential in the area around the
sprinkler. Condensation can lead to ice build-up, which could inhibit sprinkler
operation or cause premature operation.
If using the insulating boot assemblies included with your sprinklers (optional
for installation), follow the installation instructions in this technical data page.
Insulating boot assemblies, if used, shall be installed on smooth, flat, and clean
surfaces. There are specific installation situations, as with corrugated ceiling
panels, where alternative penetration sealing methods may be utilized. For
additional information contact Viking Technical Services.
2. LISTINGS AND APPROVALS
FM Approved: Classes 2013 and 2015
Refer to Approval Chart and Design Criteria for FM Approval
requirements that must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: 7 psi (0.5 bar)*
Maximum Working Pressure: 175 psi (12 bar).
Factory tested hydrostatically to 500 psi (34.5 bar)
Thread size: 1-1/4" NPT or 32 mm BSPT
Nominal K-Factor: 11.2 U.S. (161.3 metric**) for all listed and approved lengths.
Covered by the following U.S. Patents: 10,220,231
* FM Approval, and NFPA 13 installs require a minimum of 7 psi (0.5 bar).
**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:
Frame Casting: Brass UNS-C84400
Deflector: Brass
Fusible Link Assembly: Beryllium Nickel, coated with Polyurethane
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Compression Screw: Brass UNS-C36000
Pip Cap: Brass UNS-C36000
Pip Cap Adapter: Brass UNS-C36000
Orifice: Brass UNS-C36000
Tube: ERW Hydraulic Steel Tube
Barrel End and Threads: QM Brass
Support (Internal): QM Brass
Barrel: Steel Pipe UNS-G10260, Electrodeposited Epoxy Base finish
Form No. F_040915 21.09.28
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Rev. 21.1
QUICK RESPONSE
DRY PENDENT
ELO SPRINKLERS
Thread Size
1-1/4" NPT
(32 mm BSPT)
SIN
VK547
VK548
VK549
Replaces Form No. F_040915 Rev 20.1
(Revised Ceiling opening dimensions; Updated format.)
Page 1 of 9
K-Factor
11.2
(161.3 Metric)
Style
Plain Barrel
Adjustable Recessed
Adjustable Standard