Viking VK520 Manual

April 1, 2011
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: techsvcs@vikingcorp.com
1. DESCrIPTION
Viking Early Suppression Fast Response (ESFR) Upright Sprinkler VK520 is a fast
response fusible element type sprinkler designed for early fire suppression. With a
14.0 (202 metric*) nominal K-Factor and special deflector, this sprinkler produces
large, high-momentum water droplets in a hemispheric pattern below the deflector.
This permits penetration of the fire plume and direct wetting of the burning fuel sur-
face while cooling the atmosphere early in the development of a high-challenge fire.
Viking VK520 ESFR Upright Sprinklers may be used in the protection of ordinary
types of storage. However, they are primarily intended to protect the following types
of storage, which tend to produce severe-challenge fires: palletized and solid pile
storage and single, double, multiple row, and portable open rack storage (no open-
top containers or solid shelves).
Viking ESFR Upright VK520 Sprinklers provide protection of most common storage
materials up to 30 ft. (9.1 m) high in buildings up to 35 ft (10.7 m) high, including:
--Encapsulated or unencapsulated Class I, II, III, and IV commodities*.
--Cartoned unexpanded plastics*.
--Cartoned expanded plastics*.
* Refer the Approval Chart on page 121c and Design Criteria on page 121d for FM Approval requirements that must be followed.
In addition, some storage arrangements of rolled paper and rubber tire storage may be protected by Viking ESFR Upright Sprinkler
VK520.
2. LISTINgS AND APPrOVALS
FM Approved: Class 2008
NYC Approved: MEA 89-92-E, Volume 18
CE Certified: Standard EN12259-1, EC-certificate of conformity 1725-CPD-H0006, ETA-10/0306
The 10625, VK520, ESFR Upright Sprinkler Assembly conforms to the provision of EN12259-1 standard.
EN12259-1 approvals are provided by: FM Approvals Ltd. 1 Windsor Dials, Windsor, Berkshire, UK. SL4 1 RS
Approval Certificate No. issued December 20, 2010.
Refer the Approval Chart on page 121c and Design Criteria on page 121d for FM Approval requirements that must be fol-
lowed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: Refer to NFPA 13 and/or FM Global Loss Prevention Data Sheets.
Maximum Working Pressure: 175 psi (12 bar). Factory tested hydrostatically to 500 psi (34.5 bar).
Thread size: 3/4" (20 mm) NPT
Nominal K-Factor: 14.0 U.S. (202 metric*)
* Metric K-factor measurement shown is when pressure is measured in bar. When pres-
sure is measured in kPa, divide the metric K-factor shown by 10.0.
Overall Length: 3-3/8" (86 mm)
Deflector Diameter: 2-7/8" (73 mm)
U.S. Patent No. 6,585,054
Material Standards:
Frame Casting: Brass UNS-C84400
Deflector: Copper UNS-C19500 or Phosphor Bronze UNS-C51000
Lock Nut: Brass UNS-C36000
Seat (pip cap) and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with Teflon Tape
Compression Screw: Stainless Steel UNS-S31603
Trigger and Support: Stainless Steel UNS-S31600
Fusible Element Assembly: Beryllium Nickel, coated with black acrylic paint.
Ejector Spring (for the ordinary temperature rated sprinkler only): 17-7 Stainless Steel
Form No. F_060298
TECHNICAL DATA
ESFr uPrIgHT SPrINkLEr
SIN Vk520 (k14.0)
Viking Technical Data may be found on
The Viking Corporation's Web site at
http://www.vikinggroupinc.com.
The Web site may include a more recent
edition of this Technical Data Page.
Replaces page 121a-f dated May 14, 2010.
(Added CE Approval to Sprinkler 10625.)
Sprinkler 121a