Viking MICROFAST VK332 Technical Data Manual

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com.
1. DESCRIPTION
The Viking Microfast Quick Response Fusible Element Pendent Sprinkler VK332 is
®
a small, thermosensitive, solder link spray sprinkler available with various finishes
and temperature ratings to meet design requirements. The special Polyester and
Electroless Nickel PTFE (ENT) coatings can be used in decorative applications where
colors are desired. In addition, the ENT coating has been investigated for installation
in corrosive environments and is listed/approved as indicated in the Approval
Charts.
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
Refer to Approval Chart and Design Criteria cULus Listing requirements that
must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: 7 psi (0.5 bar)
Rated to 175 psi (12 bar) water working pressure
Factory tested hydrostatically to 500 psi (34.5 bar)
Thread size: 1/2" NPT, 15 mm BSPT
Nominal K-Factor: 4.2 U.S. (58 metric**)
Overall Length: 2-1/4" (58 mm)
*cULus Listing, FM Approval, and NFPA 13 installs require a minimum of 7 psi (0.5 bar). The minimum operating pressure for LPCB and CE
Approvals ONLY is 5 psi (0.35 bar).
Material Standards:
Frame Casting: Brass UNS-C84400
Deflector: Brass UNS-C26000
Bushing: Brass UNS-C36000
Fusible Element Assembly: Nickel Alloy
Trigger and Support: Stainless Steel UNS-S31603
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Seat and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
Screw: Brass UNS-C36000
For Polyester Coated Sprinklers: Belleville Spring-Exposed
For ENT Coated Sprinklers: Belleville Spring-Exposed, Screw and Pip Cap ENT Plated
Ordering Information: (Also refer to the current Viking price list.)
Order Viking Microfast
sprinkler finish and then the appropriate suffix for the temperature rating to the sprinkler base part number.
Finish Suffix: Brass = A, Chrome = F, White Polyester = M-/W, Black Polyester = M-/B and ENT = JN
Temperature Suffix: 165 °F (74 °C) = C, 205 °F (96 °C) = E, and 280 °F (138 °C)
For example, sprinkler VK332 with a 1/2" NPT thread, Brass finish and a 165 °F (74 °C) temperature rating = Part No. 13961AB
Available Finishes And Temperature Ratings: Refer to Table 1.
Accessories: (Also refer to the Viking website.)
Sprinkler Wrenches (See Figure 1:
A. Standard Wrench: Part No. 21475M/B (available since 2000).
B. Wrench for Recessed Pendent Sprinklers: Part No. 13655W/B** (available since 2006)
C. Optional Protective Sprinkler Cap Remover/Escutcheon Installer Tool*** Part No. 15915 (available since 2010)
**A ½" ratchet is required (not available from Viking).
***Allows use from the floor by attaching a length of 1" diameter CPVC tubing to the tool. Ideal for sprinkler cabinets. Refer to Bulletin F_051808.
Sprinkler Cabinets:
A. Six-head capacity: Part No. 01724A (available since 1971)
B. Twelve-head capacity: Part No. 01725A (available since 1971)
Form No. F_071214 21.03.05
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Quick Response Fusible Element Pendent Sprinkler VK332 by first adding the appropriate suffix for the
®
Rev 21.1
TECHNICAL DATA
MICROFAST QUICK
®
RESPONSE FUSIBLE
ELEMENT PENDENT
SPRINKLER VK332 (K4.2)
Replaces Form No. F_071414 Rev 20.1
(Removed bushed part numbers)
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