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ESFR PENDENT 

SPRINKLER VK510 (K25.2)

TECHNICAL DATA

Page 1 of 7

Form No. F_100102   20.01.23    Rev 20.1

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 VK510 in-

corporates the capability to suppress specific high-challenge fires. The addition 

of a larger K-Factor allows ESFR performance at lower end-head pressures than 

ESFR K14 sprinklers. K25.2 ESFR sprinklers can:

•  Eliminate the use of in-rack sprinklers when protecting high-piled storage of 

certain specified materials up to specific heights.*

•  Reduce or eliminate the need for a system fire pump.
•  Provide flexibility when sizing system piping.

Viking VK510 ESFR Pendent Sprinklers are primarily intended to protect the fol-

lowing 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 Pendent VK510 Sprinklers provide protection of most common stor-

age materials, including: 

•  Encapsulated or unencapsulated Class I, II, III, and IV commodities*.
•  cULus Listed for protection of cartoned unexpanded plastic commodi-

ties and FM Approved for protection of cartoned and uncartoned unex-

panded plastic commodities*.

•  FM Approved for protection of exposed expanded polystyrene and ex-

posed expanded polyurethane commodities*.

In addition, some storage arrangements of rolled paper, flammable liquids, 

aerosols, and rubber tires may be protected by Viking ESFR Pendent 

Sprinkler VK510.

2.  LISTINGS AND APPROVALS

cULus Listed: 

Category VNWH (Listed as a Specific Application 

ESFR Sprinkler)

FM Approved:

 Class 2026

VdS Approved:

 Certificate G4040015

LPCB Approved: 

Ref. No. 096g/01

China Approval: 

Approved according to China GB Standard

The 10280 VK510, ESFR Pendent Sprinkler Assembly conforms to the provision of CUAP11.03/03 standard.

CUAP11.03/03 approvals are provided by: FM Approvals Ltd. 1 Windsor Dials Windsor, Berkshire, UK. SL4 1 RS 
Approval Certificate No. issued December 20, 2010.

Note: 

Other International approval certificates are available upon request.

* Refer the Approval Chart and Commodity Selection and Design Criteria Overview for cULus Listing and FM Approval requirements that must be 

followed.

3.  TECHNICAL DATA

Specifications:

Minimum Operating Pressure: Refer to NFPA 13 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: 1” NPT for Sprinkler 12080, 25 mm BSPT for Sprinkler 12200  

Nominal K-factor: 25.2 U.S. (363 metric*)

* Metric K-factor measurement shown is in bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.

TABLE 1

SPRINKLER GENERAL INFORMATION

Item

Description

Sprinkler Identification 
Number (SIN)

VK510

K-factor, gpm/psi

½

 (lpm/bar

½

) 25.2 (363) 

Thread Size

1” NPT (25mm BSPT)

Sprinkler Orientation

Pendent

Maximum Working Pressure 

PSI (bar)

175 psi (12 bar)

Replaces Form No F_100102 Rev 19.2

(Revised FM Specification)

Содержание VK510

Страница 1: ...M Approved for protection of exposed expanded polystyrene and ex posed expanded polyurethane commodities In addition some storage arrangements of rolled paper flammable liquids aerosols and rubber tires may be protected by Viking ESFR Pendent Sprinkler VK510 2 LISTINGS AND APPROVALS cULus Listed Category VNWH Listed as a Specific Application ESFR Sprinkler FM Approved Class 2026 VdS Approved Certi...

Страница 2: ...emperature rating and response characteristics C With the sprinkler contained in the plastic protective cap apply a small amount of pipe joint compound or tape to the male threads only while taking care not to allow a build up of compound in the sprinkler orifice D Use ONLY sprinkler wrench 13635W B shown in Figure 1 for installing ESFR Sprinkler VK510 With the sprinkler contained in the protectiv...

Страница 3: ...ttern is critical for proper fire protection Therefore nothing should be hung from attached to or otherwise obstruct the discharge pattern All obstructions must be immediately removed or if necessary additional sprinklers installed D When replacing existing sprinklers the system must be removed from service Refer to the appropriate system description and or valve instructions Prior to removing the...

Страница 4: ...rature Rating1 Maximum Ambient Ceiling Temperature2 Frame Paint Color Ordinary 165 F 74 C 100 F 38 C None Intermediate 205 F 96 C 150 F 65 C White Sprinkler Finish Brass Footnotes 1 The sprinkler temperature rating is stamped on the deflector 2 Based on NFPA 13 Other limits may apply depending on fire loading sprinkler location and other requirements of the Authority Having Jurisdiction Refer to s...

Страница 5: ...n is when pressure is measured in bar When pressure is measured in kPa divide the metric K Factor shown by 10 0 3 This chart shows listings and approvals available at the time of printing Other approvals may be in process 4 Refer to the latest standards of NFPA 13 FM Global Loss Prevention Data Sheets LPCB Loss Prevention Standards and the latest VdS standards 5 Listed by Underwriters Laboratories...

Страница 6: ...PA 13 Refer to FM 2 0 and 8 9 Solid Pile or Palletized Storage of Class I IV and Group A or B Plastics Refer to NFPA 13 Refer to FM 2 0 and 8 9 Idle Pallet Storage Refer to NFPA 13 Refer to FM 2 0 8 9 and 8 24 Rubber Tire Storage Refer to NFPA 13 Refer to FM 2 0 and 8 3 Rolled Paper Storage Refer to the standard Refer to NFPA 13 Refer to FM 8 21 Flammable Liquid Storage Refer to the standard Refer...

Страница 7: ... Refer to FM 8 9 Section 2 3 3 3 Deflector Distance from Walls Minimum of 4 in 102 mm from walls but no more than 1 2 the allowable distance permitted between sprinklers Refer to FM 2 0 Section 2 2 3 3 Deflector to Top of Storage Minimum of 36 in 914 mm Minimum of 36 inches 914 mm Refer to FM 2 0 Section 2 2 2 1 and FM 8 9 Section 2 2 6 Deflector to Ceiling Distance Ceiling roof heights up to 40 f...

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