ESFR PENDENT SPRINKLER
UL: SPECIFIC APPLICATION ESFR SPRINKLER
FM: STORAGE SPRINKLER
NFPA: SPECIAL SPRINKLER
VK514 (K28.0)
TECHNICAL BULLETIN
Page 1 of 6
Form No. F_102422 Rev 01 October 2022
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: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
1. DESCRIPTION
Viking Early Suppression Fast Response (ESFR) Pendent Sprinkler VK514
incorporates the capability to suppress specific high-challenge fires. The larger
K-Factor allows protection of higher hazard commodities at greater ceiling heights
with lower end-head pressures. K28.0 sprinklers can:
• Provide flexibility of fire protection designs.
• Eliminate the use of in-rack sprinklers when protecting high piled storage of
certain specified materials up to:
UL (Refer to Table 4):
43 ft. (13,1 m) with ceilings up to 48 ft. (14,6 m)*
FM (Refer to Table 5):
50 ft. (15,2 m) with ceilings up to 55 ft. (16,76 m)*
OR
45 ft. (13,5 m) with ceilings up to 50 ft. (15,2 m)*
NFPA 13 (Refer to Table 6):
The VK514 is a
Special Sprinkler as defined by
the National Fire Protection Association (NFPA 13, 2022 Ed.-Section 15.2).
Viking ESFR Pendent Sprinklers VK514 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, and portable open rack storage (no
open-top containers or solid shelves). The VK514 is listed to utilize a minimum
aisle width of 6’-0” (UL - 43’ storage or FM - 45’ storage) or 8’-0” (FM - 50’ storage).
Viking ESFR Pendent Sprinklers VK514 provide protection of most common
storage materials, including:
• Encapsulated or unencapsulated Class I, II, III, and IV commodities*.
• UL Listed for protection of cartoned nonexpanded** Group A plastic
commodities*.
• FM Approved for protection of cartoned unexpanded** plastic commodities.*
* Refer the Approval Chart and Commodity Selection and Design Criteria Overview for Listing
and Approval requirements that must be followed.
** The terms nonexpanded and unexpanded are equivalent.
2. LISTINGS AND APPROVALS*
UL Listed:
Category VNWH (Listed as an ESFR Sprinkler)
FM Approved:
Class 2035
* Refer the Approval Chart and Commodity Selection and Design Criteria Overview for Listing and Approval requirements that must be followed.
3. PATENT INFORMATION
Please refer to PATVK.COM for all appropriate patents and patent information pertaining to the Model VK514 ESFR Sprinkler.
4. TECHNICAL DATA
Specifications:
Maximum Working Pressure: 175 psi (12 bar). Factory tested hydrostatically to 500 psi (34.5 bar).
Thread size: 1” NPT or 25 mm BSPT (Refer to Table 2)
Nominal K-factor: 28.0 U.S. (404 metric*)
* Metric K-factor measurement shown is in bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.
Overall Length: 3-3/16” (81 mm)
Deflector Diameter: 1-3/4” (45 mm)
Material Standards:
Frame Casting: Brass UNS-C84400 or CW602N
Deflector: Phosphor Bronze UNS-C51000
Seat: Copper UNS-C11000 and Stainless Steel UNS-S30400
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Compression Screw: Stainless Steel UNS-S31603
Trigger and Support: Stainless Steel UNS-S31600
Fusible Element Assembly: Beryllium nickel coated with a black epoxy, polyurethane (FM only), or acrylic paint
Ordering Information:
Refer to Table 2
TABLE 1
SPRINKLER GENERAL INFORMATION
Item
Description
Sprinkler Identification
Number (SIN)
VK514
K-factor, gpm/psi
½
(lpm/bar
½
)
28.0 (404)
Thread Size
1” NPT (25 mm)
Sprinkler Orientation
Pendent
Maximum Working Pressure
175 psi (12 bar)
