Viking MIRAGE VK461 Technical Data 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 Mirage Standard and Quick Response Concealed Pendent Sprinkler VK461
®
is a thermosensitive glass-bulb spray sprinkler designed for installation on concealed
pipe systems where the appearance of a smooth ceiling is desired.
The sprinkler is pre-assembled with a threaded adapter for installation with a low-pro-
file cover assembly that provides up to ½" (13 mm) of vertical adjustment. The two-piece
design allows installation and testing of the sprinkler prior to installation of the cover
plate. The The "push-on" and "thread-on" designs of the concealed cover plate assem-
blies allow easy installation of the cover plate after the system has been tested and the
ceiling finish has been applied. The cover assembly can be removed and reinstalled,
allowing temporary removal of ceiling panels without taking the sprinkler system out of
service or removing the sprinkler.
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
FM Approved: Class 2015
NYC Approved: MEA 89-92-E, Volume 38
Refer to the Approval Charts and Design Criteria for listing and aproval re-
quirements that must be followed.
3. TECHNICAL DATA
Specifications:
Available since 2006.
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: 1/2" (15 mm) NPT
Nominal K-Factor: 2.8 U.S. (40.3 metric*)
* Metric K-factor measurement is shown 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)
Patents Pending
Material Standards:
Sprinkler Body: Brass UNS-C84400
Deflector: Copper UNS-C19500
Deflector Pins: Stainless Steel UNS-S30300
Bushing: Brass UNS-C36000
Bulb: Glass, nominal 3 mm diameter
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
Button: Brass UNS-C36000
Screws: 18-8 Stainless Steel
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Yoke: Phosphor Bronze UNS-C51000
Cover Adapter: Cold Rolled Steel UNS-G10080, Finish: Clear Chromate over Zinc Plating
Cover Assembly Materials:
Cover: Copper UNS-C11000
Base: Brass UNS-C26000 or UNS-C26800
Springs: Nickel Alloy
Solder: Eutectic
Ordering Information: The sprinkler and cover plate must be ordered separately. Refer to Tables 1 and 2.
4. INSTALLATION
Refer to appropriate NFPA Installation Standards.
Form No. F_091506 Rev 01
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
April 2023
MIRAGE STANDARD
®
AND QUICK RESPONSE
CONCEALED PENDENT
SPRINKLER VK461 (K2.8)
For Light Hazard Occupancies Only
Replaces Form F_091506 Rev 20.2
(Adding venting statement (s))
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