Viking VK449 Mode d’emploi

Page 1 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

Replaces Form No. F_061721 Rev 02

(Removed 175 deg.)

1. PRODUCT IDENTIFICATION

This document covers the following products, hereafter referred to as “sprinkler":

VK449: Fast Response, Residential Horizontal Sidewall, K4.0 (57.7 metric)

Sprinklers

2. INTENDED USE

The spinklers are designed for wet systems where it is necessary to prevent

water or condensation from entering the supply nipple before sprinkler operation.

They may also be installed in spaces subject to freezing and supplied from a

wet system in an adjacent heated area. The sprinkler is intended to be used in

automatic fire sprinkler systems as allowed by applicable approval authorities.

The sprinkler must be used in accordance with:

1. the sprinkler’s Listings, Approvals, and associated design requirements

2. the recognized design and installations standards issued, for example NFPA

or FM Global.

3. the latest revisions of all applicable manufacturer’s documentation

Additionally, the provisions of governmental codes, ordinances, and standards

may apply.

NOTE:The Installation guidelines and requirements may differ depending on the approval body.

3. LISTINGS AND APPROVALS

Refer to section 6 for requirements that must be followed.

cULus Listed

Refer to the Approval Chart and Design Criteria for Listing and Approval requirements that must be followed.

4. TECHNICAL SPECIFICATIONS

4.1 Ratings and Physical Characteristics

Parameter Value

Minimum operating pressure 7 psi (0.5 bar)

Maximum rated pressure 175 psi (12 bar)

Factory tested pressure 500 psi (34.5 bar)

Thread size 1" NPT or 25 mm BSPT

Nominal K–factor 4.0 U.S. (57.7 metric)

Minimum temperature rating (glass bulb) –65 °F (–55 °C)

Available since April 2023.



Page 2 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

4.2 Markings

Ref. Description Value

AOrientation indicator Text “TOP”

BManufacturer’s Sprinkler Identification Number (SIN) VK449

CListing logo cULus

DFlow direction indicator See markings

ENominal K-factor 4.0

FNominal temperature rating See marking

GFrame orientation indicator See marking; see Figure 6.

4.3 Materials of Construction

Description Material

Compression screw 18-8 stainless steel

Flow shaper Brass UNS-C23000 or UNS-C51000

Frame casting QM brass or brass UNS-C84400

Pip cap adapter Polytetrafluoroethylene (PTFE)

Pip cap Brass UNS-C36000

Belleville spring sealing assembly Nickel alloy, coated on both sides with PTFE tape

Yoke Phosphor bronze UNS-C51000

Bulb Glass, nominal (3 mm) diameter

Orifice Copper UNS-C11000 or UNS-22000

Tube ERW hydraulic steel tube

Inlet and barrel end QM brass

Support (internal) Brass UNS-C36000

Barrel Steel pipe UNS-G10260, electrodeposited epoxy base finish

Recessed dry escutcheons Cold rolled steel: UNS-G10080

ENT recessed escutcheons Stainless steel UNS-S30400

Figure 2: Markings

Page 3 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

5. INSTALLATION

Refer to appropriate NFPA Installation Standards and Figures 3, 4, 5. and 6.

Figure 3: Using the Sprinkler Installation Wrench

Figure 4: Installation Dimensions with Adjustable Recessed Escutcheon

Ref Variable Parameter Minimum Maximum

1Wall opening  

2Deflector to ceiling distance 4” (102 mm) 12” (305 mm)

3Deflector to wall distance  2” (51 mm)

Ref Fixed Parameter Value

4Escutcheon depth 

5Escutcheon outer diameter 

6Top of deflector to centerline 

Finished Wall

Finished

Ceiling

Page 4 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

Figure 5: Installation Dimensions with G-1 Escutcheon

Figure 6: Sprinkler Orientation

Ref Variable Parameter Minimum Maximum

1Wall opening  

2Deflector to ceiling distance 4” (102 mm) 12” (305 mm)

*NOTE: The “A” dimension will allow 1/4” (6 mm) adjustment in either direction.

Ref Fixed Parameter Value

3Escutcheon depth 1¹/” (27 mm)

4Escutcheon outer diameter 4” (102 mm)

5Escutcheon outer cup inner diameter ” (16 mm)

6Escutcheon rim thickness 

7Escutcheon inner adapter depth 

Ref Parameter

ATop of deflector marked with “TOP”

BLeading edge of the top of the deflector must be

parallel with ceiling

CFrame arms must be perpendicular to ceiling

D Ceiling

Finished Wall

Finished

Ceiling

Adapter ring Outer cup

TOP

NOTE: Frame orientation mark

must be oriented on the bottom

left corner (when facing the

sprinkler)

Page 5 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

6. LISTING AND APPROVAL DESIGN REQUIREMENTS

All sprinklers are to be installed in accordance with the latest revisions of all applicable manufacturer’s documentation, installation

standards, and also with the provisions of governmental codes, ordinances, and standards, whenever applicable.

6.1 cULus Listing Requirements

Residential Dry Horizontal Sidewall Sprinklers are cULus Listed as Indicated in the Approval Chart for Installation in accordance with

the latest edition of NFPA 13, 13R, or 13D for residential sprinklers.

For systems designed to NFPA 13, The number of design sprinklers is to be the four contiguous most hydraulically

demanding sprinklers. The minimum required discharge from each of the four sprinklers is to be the greater of the

following:

• The flow rates given in the Approval Chart for NFPA 13D and NFPA13R applications for each listed area of coverage OR

• Calculated based on a minimum discharge of 0.1 gpm/sq. ft. over the “design area” in accordance with NFPA 13.

In addition, the following criteria apply:

• Designed for use in Residential occupancies in accordance with NFPA 13.

• Minimum spacing allowed is 8 ft. (1.8 m).

• Deflector must be positioned between 4” and 12” (102 mm and 305 mm) below the ceiling. Keep the leading edge of the deflector and the cen-

terline axis of the sprinkler frame oriented parallel with the ceiling.

• Locate no less than 4” (102 mm) from end walls.

• Maximum distance from end walls shall be no more than one-half of the allowable distance between sprinklers. The distance shall be measured

perpendicular to the wall.

• The sprinkler installation and obstruction rules contained in NFPA 13 for residential sprinklers must be followed.

6.2 Corrosion Resistant Coatings

The white polyester and black polyester finishes are cULus listed as corrosion resistant. Prior to installation, verify that the coatings

are compatible with, or suitable for, the proposed environment.

IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Form No. F_080614

for general care, installation, and maintenance information. Viking sprinklers are to be installed in accordance with the

latest edition of Viking technical data, the appropriate standards of NFPA, FM Global, LPCB, APSAD, VdS or other similar

organizations, and also with the provisions of governmental codes, ordinances, and standards, whenever applicable.

Page 6 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

6.3 Listing and Approval Specifications

Table 6.3: Approval Chart

Viking VK449, 4.0K-Factor Dry Residential Horizontal Sidewall Sprinkler

For Wet Pipe systems designed to NFPA 13D or NFPA 13R. For Wet Pipe systems designed to NFPA 13, refer to the design criteria.

For Ceiling types refer to current editions of NFPA 13, 13R or 13D.

Sprinkler

Base Part

Number 1

Style SIN

Thread Size Nominal K-Factor Maximum Water

Working Pressure

Lengths

NPT BSPT U.S. Metric Increments

Inches

Minimum

Inches (mm)

Maximum

Inches (mm)

24961 Recessed VK449 1” -- 4.0 57.7 175 1/4"  (95) 24 (610)

25556 Recessed VK449 -- 25 mm 4.0 57.7 175 1/4"  (95) 24 (610)

Footnotes

1. Part number shown is the base part number. For complete part number, refer to Viking’s current price schedule.

2. Listed by Underwriter’s Laboratories, Inc. for use in the United States and Canada.

3. Approved Finishes are: brass, chrome, ENT, white polyester, and black polyester.

4. Sprinklers with the white and black polyester finishes are cULus listed as corrosion resistant.

5. Other paint colors are available on request with the same cULus listings as the standard finish colors.

6.4 Hydraulic Design Criteria

Table 6.4: Hydraulic Design Criteria1

Viking VK449, 4.0K-Factor Dry Residential Horizontal Sidewall Sprinkler

For Wet Pipe systems designed to NFPA 13D or NFPA 13R. For Wet Pipe systems designed to NFPA 13, refer to the design criteria.

For Ceiling types refer to current editions of NFPA 13, 13R or 13D.

Max. Coverage Area 1

Width X Length

Ft. X Ft.

(m X m)

Max. Spacing

Ft.

(m)

Temperature Rating

Top of Deector to Ceiling

155 °F (68 °C) 200 °F (93 °C)

Flow 2

GPM

(L/min)

Pressure 2

PSI

(bar)

Flow 2

GPM

(L/min)

Pressure 2

PSI

(bar)

12 X 12 (3.7 X 3.7) 12 (3.7) 13 10.6 13 10.6

4 to 6 inches

14 X 14 (4.3 X 4.3) 14 (4.3) 14 12.3 14 12.3

16 X 16 (4.9 X 4.9) 16 (4.9) 18 20.3 18 20.3

16 X 18 (4.9 X 5.5) 16 (4.9) 21 27.6 21 27.6

16 X 20 (4.9 X 6.1) 16 (4.9) 25 39.1 25 39.1

12 X 12 (3.7 X 3.7) 12 (3.7) 13 10.6 14 12.3

6 to 12 inches

14 X 14 (4.3 X 4.3) 14 (4.3) 15 14.1 15 14.1

16 X 16 (4.9 X 4.9) 16 (4.9) 19 22.6 19 22.6

16 X 18 (4.9 X 5.5) 16 (4.9) 21 27.6 21 27.6

16 X 20 (4.9 X 6.1) 16 (4.9) 25 39.1 25 39.1

1. This chart shows the listings and approvals available at the time of printing. Other approvals may be in process. Check with the manufacturer for any additional ap-

provals. Refer also to Design Criteria.

2. For areas of coverage smaller than shown, use the “Flow” and “Pressure” for the next larger area listed. Flows and pressures listed are per sprinkler. The distance

from sprinklers to walls shall not exceed one-half the sprinkler spacing indicated for the minimum “Flow” and “Pressure” used.

Page 7 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

Ambient Temperature

of the Protected Area*

at the Discharge End

of the Sprinkler

Exposed Barrel Ambient Temperature

40 °F (4 °C) 50 °F (10 °C) 60 °F (16 °C)

Exposed Minimum Barrel Length**

Face of the Tee to the Outer Surface of the Wall

Inches (mm) Inches (mm) Inches (mm)

40 °F (4 °C) 000

30 °F (-1 °C) 000

20 °F (-7 °C) 4 (100) 0 0

10 °F (-12 °C) 8 (200) 1 (25) 0

0 °F (-18 °C) 12 (300) 3 (75) 0

-10 °F (-23 °C) 14 (350) 4 (100) 1 (25)

-20 °F (-29 °C) 14 (350) 6 (150) 3 (75)

-30 °F (-34 °C) 16 (400) 8 (200) 4 (100)

-40 °F (-40 °C) 18 (450) 8 (200) 4 (100)

-50 °F (-46 °C) 20 (500) 10 (250) 6 (150)

-60 °F (-51 °C) 20 (500) 10 (250) 6 (150)

6.5 Minimum Exposed Barrel Lengths



minimum exposed barrel length that is in accordance with the latest edition of NFPA 13 (refer to Figure 7).

The minimum exposed length shall be measured along the length of the dry sprinkler from the face of the fitting to which the dry

sprinkler is installed to the inside surface of the insulation, or wall leading to the cold space, whichever is closest to the fitting.

NOTES:

• The protected area refers to the area below the ceiling, the ambient temperature is the temperature at the discharge end

of the sprinkler. For protected area temperatures that occur between the values listed, use the next cooler temperature.

• The minimum required barrel length is not the same as the “A” dimension. Refer to Figure 8 for the “A” Dimension.

• Exposed minimum barrel lengths are inclusive up to 30 mph wind velocities.

Figure 7: Minimum Barrel Length Based on Ambient Temperature in the Protected Area

Exposed

Barrel

Outer surface

of wall

Page 8 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

7. ORDERING PROCEDURE

7.1 Sprinkler

When ordering the sprinkler, the “A” dimension must be known. The “A” dimension is the distance as measured from the face of

the fitting in which the sprinkler will be installed to the face of the finished surface in the protected area. See Figure 7 to determine

this dimension.

1. Based on desired escutcheon model, determine the “A” dimension as shown in Figure 8; measure from the centerlines of the

tee and hole.

2. Round to the nearest 1/4” (16 mm) between 3-3/4” (83 mm) and 24” (610 mm).

3. From below, choose a sprinkler base part number with the required thread size and listing or approval (refer to section 6).

NOTE: If the Model G-1 escutcheon is desired, add the suffix “Y”. See Figure 5.

4. Add the suffix for the desired finish.

5. Add the suffix for the desired temperature rating.

6. Add the number that indicates the “A” dimension.

NOTE:Where a dash (–) is shown in the finish suffix designation, insert the desired temperature rating suffix.

EXAMPLE: 24961MB/W12 is a VK449 with a white polyester finish and a 155 °F (68 °C) temperature rating with “A” dimension of

12 inches. This sprinkler is to be installed into an area with a maximum ambient temperature of 100 °F (38 °C).

3. Sprinkler 4. Finish 5. Temperature Rating

IMPORTANT: See Section 5

Description Suffix

Nominal

Temperature

Rating

Bulb

Color

Maximum Ambient

Ceiling Temperature Suffix

SIN Part

Number Size

VK449 24961  Brass A 155 °F (68 °C) Red 100 °F (38 °C) B

VK449 25556 25 mm BSPT Chrome F 200 °F (93 °C) Green 150 °F (65 °C) E

White Polyester M–/W

ENT JN

Adjustable Recessed Escutcheon:

Figure 8: “A” Dimension

G-1 Escutcheon:

HOLE

TEE

A=√(B+C

EXAMPLE: If “A” dimension is

12 inches, and the sprinkler

is recessed 1/2” (5.5 mm),

the deflector will be located

1.384 inches (35 mm) off

the wall

Page 9 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

7.2 Sprinkler Accessories

Part Number Description

24689M/B Heavy duty metal socket wrench

05459AF Recessed dry escutcheon cup, chrome finish

05459AM/W Recessed dry escutcheon cup, white polyester finish

05459AM/B Recessed dry escutcheon cup, black polyester finish

07529JN Recessed dry escutcheon cup, ENT finish

20133 Replacement G-1 escutcheon assembly (white shown, for

other colors or finishes, contact customer service)

22087M/W Dry barrel seals

Page 10 of 10

Form No. F_061721 Rev 03 April 2023

RESIDENTIAL DRY HSW

SPRINKLER K4.0 (57.7)

VK449

TECHNICAL DATA SHEET

8. CONTACT

The sprinkler and accessories are available through Viking distributors only. Contact your local Viking sales office which can be

found on our website:

Americas and Asia: www.vikinggroupinc.com/locations OR Europe, Middle East, Africa (EMEA): www.viking–emea.com/contact

Manufacturer:

The Viking Corporation

5150 Beltway SE

Caledonia, MI 49316

Tel.: (800) 968–9501

Fax: 269–818–1680

Technical Services: 1–877–384–5464

[email protected]

Importer EU:

Viking S.A.

21, Z.I, Haneboesch

L–4562 Differdange / Niederkorn

Tel.: +352 58 37 37 – 1

Fax: +352 58 37 36

vikinglux@viking–emea.com

Asia Pacific (APAC) Main Office:

The Viking Corporation (Far East) Pte. Ltd.

69 Tuas View Square

Westlink Techpark, Singapore 637621

Tel: (+65) 6 278 4061

Fax: (+65) 6 278 4609

vikingAP[email protected]

Replaces Form No. F_061721 Rev 02

(Removed 175 deg.)

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