MICROFAST
®
QUICK RESPONSE
PENDENT SPRINKLER
VK3311 (K4.2)
TECHNICAL DATA
Page 1 of 5
Form No. F_061914 19.02.21 Rev 19.1
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
The Viking Microfast
®
Quick Response Pendent Sprinkler VK3311 is a small
thermosensitive glass bulb spray sprinkler available with various finishes and
temperature ratings to meet design requirements. The special Polyester and PTFE
coatings can be used in decorative applications where colors are desired. In ad-
dition, these coatings have been investigated for installation in corrosive atmos-
pheres and are listed/approved as corrosion resistant as indicated in the Approval
Charts.
2. LISTINGS AND APPROVALS
VdS Approved:
Certificates G4040095, G4040097, G4060056, G4060057,
G4880045, G4930038, and G4980021
CE Certified:
Standard EN 12259-1, EC-certificates of conformity
0786-CPD-40130, 0786-CPD-40170
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: 10 mm BSP
Nominal K-Factor: 4.2 U.S. (57 metric**)
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
Overall Length: 2-1/4” (58 mm)
Material Standards:
Frame Casting: Brass UNS-C84400
Deflector: Brass UNS-C26000
Bushing: Brass UNS-C36000
Bulb: Glass, nominal 3 mm diameter
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Screw: Brass UNS-C36000
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
For PTFE Coated Sprinklers: Belleville Spring-Exposed, Screw-Nickel Plated, Pip Cap-PTFE Coated
For Polyester Coated Sprinklers:
Belleville Spring-Exposed
Ordering Information:
(Also refer to the current Viking price list.)
Order Viking Microfast
®
Quick Response Pendent Sprinkler VK3311 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, and Black PTFE = N
Temperature Suffix: 135 °F (57 °C) = A, 155 °F (68 °C) = B, 175 °F (79 °C) = D, 200 °F (93 °C) = E, 286 °F (141 °C) = G
For example, sprinkler VK3311 with a Brass finish and a 155 °F (68 °C) temperature rating = Part No. 06932BAB
Available Finishes And Temperature Ratings:
Refer to Table 1.
Accessories:
(Also refer to the Viking website.)
Sprinkler Wrenches:
A. Standard Wrench: Part No. 21475M/B (available since 2017).
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.
Replaces form F_061914 Rev. 17.2.P65
(Removed F-1 Escutcheon.)
