Viking VK920 Technical Data Manual

August 1, 2008
The Viking Corporation, 210 N Industrial Park Road, Hastings MI 49058
Telephone: 269-945-9501 Technical Services 877-384-5464 Fax: 269-945-4495 Email: techsvcs@vikingcorp.com
1. DESCRIPTION
Viking Flat Spray Pendent Sprinklers VK920 and VK922 are small, thermosensitive,
glass-bulb sprinklers intended for installation in accordance with local standards.
They produce a flatter spray pattern than standard spray sprinklers, allowing them
to be used with lower clearance above suspended open ceillings, in racks, and
concealed spaces. Sprinklers VK920 and VK922 are VdS approved with a Brass or
Enloy ®
Chrome- finish, with various temperature ratings, and a nominal K-Factor of
5.6 (80 metric) or 8.0 (115 metric) to meet design requirements.
2. LISTINGS AND APPROVALS
VdS Approved: Certificate #
Refer to the Approval Chart on page 127c and Design Criteria on page 127e for VdS
approval requirements that must be followed.
3. TECHNICAL DATA
Specifi cations:
Available since 2008.
Minimum Operating Pressure: Refer to CEA 4001 or EN12845.
Maximum Working Pressure: 175 psi (12 bar).
Factory tested hydrostatically to 500 psi (34.5 bar)
Testing: U.S.A. Patent No. 4,831,870
Thread size: 1/2" (15 mm) or 3/4" (20 mm) NPT
Nominal K-Factor: 5.6 U.S. (80.6 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: 2-1/4" (58 mm) for Sprinkler VK920, 2-5/16" (59 mm) for Sprinkler VK922
Material Standards:
Frame Casting: Brass UNS-C84400
Deflector: Brass UNS-C26000
Bulb: Glass, nominal 3 mm diameter
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with Teflon Tape
Screw: Brass UNS-C36000
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
Ordering Information:
Order Flat Spray Pendent Sprinklers VK920 and VK922 by first adding the appropriate suffix for the sprinkler finish and then the
appropriate suffix for the temperature rating to the sprinkler base part number.
Finish Suffix: Brass = A, Chrome-Enloy
Temperature Suffix (°F/°C): 155°/68° = B, 175°/79° = D, 200°/93° = E
For example, sprinkler VK920 with a Brass finish and a 155 °F/68 °C temperature rating = Part No. 15111AB
Available Finishes and Temperature Ratings:
Refer to Table 1
Accessories: (Also refer to the "Sprinkler Accessories" section of the Viking data book.)
Sprinkler Wrench: Standard Wrench: Part No. 10896W/B (available since 2000).
Sprinkler Cabinets:
A. Six-head capacity: Part No. 01724A (available since 1971)
B. Twelve-head capacity: Part No. 01725A (available since 1971)
Form No. F_072508
TECHNICAL DATA
) or 8.0 U.S. (115.2 metric*)
*
(Also refer to the current Viking price
® = F
SPRINKLERS VK920 (K80)
Sprinkler VK920 (K80) and VK922 (K115)
Viking Technical Data may be found on
The Viking Corporation's Web site at
The Web site may include a more recent
edition of this Technical Data Page.
list.)
New page 127a-e, issued August 1, 2008.
Sprinkler 127a
FLAT SPRAY PENDENT
AND VK922 (K115)
http://www.vikinggroupinc.com.