TECHNICAL DATA
September 17, 2009
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]
MODEL VKFD25U
PRE-ASSEMBLED FLEXIBLE
SPRINKLER DROP
ASSEMBLIES
(UNBRAIDED)
DESIGN CRITERIA
cULus Listing Requirements:
• Approved for use in ceilings with medium and heavy load grids (ASTM C635 and C636).
• Compatible with Viking CPVC BlazeMaster
®
sprinkler systems.
• Meets NFPA 13, NFPA 13D and NFPA 13R guidelines and EN12845.
• Intended for use in wet or dry systems.
• The maximum permissible number of bends is (2) x 90° for 39-3/8“ lengths at the manufacturer’s specified bend radius of 4” (102 mm) for
cULus.
• In suspended ceiling, Viking Flexible Sprinkler Drops must be installed in accordance with Viking Flex Drop Installation and Design Manual, Form
No. F_112107.
• In suspended ceilings, outlet reducer must be secured to the ceiling support system with brackets supplied.
Hydraulic calculations for NFPA systems must include the values in Table 3 on page 138j using the maximum number of bends that includes
the inlet and outlet fittings as indicated. Authorities Having Jurisdiction will require proper hydraulic calculations and inspect for proper
bend radii and maximum quantity of bends as indicated in the table. Refer to the Viking Flex Drop Installation and Design Manual, Form No.
F_112107, for proper application and installation of Flexible Sprinkler Drops.
NOTE: Refer to the specific sprinkler data page for the sprinkler model used with the Flexible Sprinkler Drop.
CAUTIONS:
•
Minimum Inside Bend Radius: 4” (102 mm) Static cULus unbraided
• Maximum Sprinkler K-Factor: 5.6 U.S. (80.6 metric)
• Maximum Number of Bends per Hose: Refer to Table 3 on page 138j.
• Repeated bending of one portion of the flexible tube before installation may cause breakage or loss of resisting pressure.
• When using concealed sprinklers, they must be installed in neutral or negative pressure plenums only.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to the
appropriate sprinkler data page. Viking sprinklers and Flexible Sprinkler Drops are designed to be installed
in accordance with the latest edition of Viking technical data, the latest 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. The use of certain types of sprinklers may be limited due to occupancy and
hazard. Refer to the Authority Having Jurisdiction prior to installation.
Form No. F_091509
Sprinkler 138l
New page 138g-l, issued September 17, 2009.
