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Sprinkler 41b

December 4, 2013

tecHnical data

microfast® and microfastHP® quick resPonse Pendent sPrinklers

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: techsvcs@vikingcorp.com

ordering information: (Also refer to the current Viking price list.) Order Microfast® and MicrofastHP® Quick Response Pendent Sprinklers by first adding the appropriate suffix for the 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, Black PTFE = N, and ENT = JN Temperature Suffix: 135 °F (57 °C) = A, 155 °F (68 °C) = B, 175 °F (79 °C) = D, 200 °F (93 °C) = E, and 286 °F (141 °C) = G For example, sprinkler VK302 with a 1/2” thread, Brass finish and a 155 °F (68 °C) temperature rating = Part No. 12979AB

available finishes and temperature ratings: Refer to Table 1. accessories: (Also refer to the “Sprinkler Accessories” section of the Viking data book.)

sprinkler Wrenches: A. Standard Wrench: Part No. 10896W/B (available since 2000).

B. Wrench for Recessed Pendent Sprinklers: Part No. 16036W/B* (available since 2011) C. Optional Protective Sprinkler Cap Remover/Escutcheon Installer Tool** Part No. 15915 (available since 2010.) *A ½” ratchet is required (not available from Viking). * * A l l o w s u s e f r o m t h e f l o o r b y a t t a c h i n g a l e n g t h o f 1 d i a m e t e r C P V C t u b i n g t o t h e t o o l . I d e a l f o r s p r i n k l e r c a b i n e t s . R e f e r t o B u l l e t i n F _ 0 5 1 8 0 8 .

sprinkler cabinets:

  • A.

    Six-head capacity: Part No. 01724A (available since 1971)

  • B.

    Twelve-head capacity: Part No. 01725A (available since 1971)

4. installation Refer to appropriate NFPA Installation Standards.

5. oPeration

During fire conditions, the heat-sensitive liquid in the glass bulb expands, causing the glass to shatter, releasing the pip cap and sealing spring assembly. Water flowing through the sprinkler orifice strikes the sprinkler deflector, forming a uniform spray pattern to extinguish or control the fire.

  • 6.

    insPections, tests and maintenance Refer to NFPA 25 for Inspection, Testing and Maintenance require- ments.

  • 7.


The Viking Microfast® and MicrofastHP® Quick Response Pendent Sprinklers are available through a network of domestic and international distributors. See The Viking Corporation web site for the closest distributor or contact The Viking Corporation.

8. Guarantee For details of warranty, refer to Viking’s current list price schedule or contact Viking directly.

figure 1: standard sprinkler Wrench 10896W/B

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