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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
Thread Size
Base
Part
SIN
Number
1
NPT
18257
VK350
3/4"
18278
VK350
--
18259
VK350
1/2"
9
20237
VK350
--
11
06665B
VK350
3/4"
14817
VK350
--
06764B
VK350
1/2"
9
Approved Temperature Ratings
A - 135 °F (57 °C), 155 °F (68 °C), 175 °F (79 °C), 200 °F (93 °C), and 286 °F
(141°C)
B - 155 °F (68 °C), 175 °F (79 °C), 200 °F (93 °C), and 286 °F (141°C)
C - 155 °F (68 °C)
1. Base part number is shown. For complete part number, refer to Viking's current price schedule.
2. Metric K-factor measurement shown is when pressure is measured in Bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.
3. This table shows the listings and approvals available at the time of printing. Check with the manufacturer for any additional approvals.
4. Listed by Underwriters Laboratories Inc. for use in the U.S. and Canada.
5. cULus Listed as corrosion resistant.
6. Other colors are available on request with the same Listings and Approvals as the standard colors.
7. CE: Standard EN 12259-1, Declaration of Performance DOP Sprinklers_LPCB_5-2-19 & DOP_VK350ENT_6-11-19.
8. CE: Standard EN 12259-1, Declaration of Performance DOP Sprinklers_VdS_23-5-13.
9. The 1/2" NPT Large Orifice Sprinkler is listed and approved for retrofit only when installed in accordance with NFPA 13.
10. MED Certified, Standard EN 12259-1, EC-certificate 0832-MED-1003.
11. Approved according to China GB Standard.
cULus Listing Requirements:
The Microfast
Quick Response Upright Sprinkler VK350 is cULus Listed as indicated in Approval Chart 1 for installation in accordance with the latest
®
edition of NFPA 13 for standard spray sprinklers.
Designed for use in Light and Ordinary Hazard occupancies.
•
The sprinkler installation rules contained in NFPA 13 for standard spray upright sprinklers must be followed.
•
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Bulletin 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, LPCB, APSAD, VdS or other similar organiza-
tions, and also with the provisions of governmental codes, ordinances, and standards, whenever applicable.
Form No. F_033014
20.10.22
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Approval Chart 1 (UL)
Microfast
Upright Sprinkler VK350
Maximum 175 PSI (12 bar) WWP
Nominal
K-Factor
BSPT
U.S.
metric
--
8.0
115.2
20 mm
8.0
115.2
15 mm
8.0
115.2
20 mm
8.0
115.2
NOTICE - Product Below - Limited Availability (Contact Local Viking Office)
--
8.0
115.2
20 mm
8.0
115.2
15 mm
8.0
115.2
DESIGN CRITERIA - UL
(Also refer to Approval Chart 1)
Rev 20.1
Quick Response
®
Overall Length
Inches
mm
cULus
2
2-5/16
59
A1, B2
2-5/16
59
A1, B2
2-5/16
59
A1, B2
2-5/16
59
C3
2-5/16
59
A1, B2
2-5/16
59
A1, B2
2-5/16
59
A1, B2
1 - Brass, Chrome, White Polyester
2 - ENT
3 - Chrome
4 - Brass, Chrome, White Polyester
and ENT
Footnotes
MICROFAST
RESPONSE UPRIGHT
SPRINKLER VK350 (K8.0)
Listings and Approvals
(Refer also to Design Criteria.)
VdS
LPCB
CE
4
A1
A1
B2, B4
A1
A1
B2, B4
A1
--
B2, B4
--
--
--
A1
A1
B1
7
A1
A1
B1
7
A1
--
A1
8
Approved Finishes
5,6
5
5,6
Page 3 of 4
QUICK
®
3
China
MED
10
Approval
B1
--
7
B1
--
7
--
--
7
--
C3
B1
--
B1
--
--
--
, and Black Polyester
5,6
, and Black Polyester
5,6,
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