VK1021 STANDARD
RESPONSE PENDENT
SPRINKLER (K5.6)
TECHNICAL DATA
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
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Form No. F_020416 Rev 22.1 March 3, 2022
1. DESCRIPTION
The Viking VK1021 Standard Response Pendent Sprinkler is a small thermosensitive
glass bulb 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, these coatings have been investigated for installation in corrosive
environments and are Listed and Approved as indicated in the Approval Chart.
2. LISTINGS AND APPROVALS
cULus Listed:
Category VNIV
FM Approved:
Classes 2017, 2015, 2043
Also approved for use in FM Approved vacuum dry sprinkler systems with a
maximum supervisory vacuum pressure of -3 psi (-207 mbar).
CE:
Standard EN12259-1, DOP_XT1A
LPCB Approved
reference no. 096m
VdS Approved
Certificate no. G 422004
Refer to the Approval Chart and Design Criteria for requirements that must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: 7 psi (0.5 bar)
Rated to: cULus - 250 PSI (17 bar) WWP
FM, LPCB, and VdS - 175 PSI (12 bar) WWP
Factory tested hydrostatically to 500 psi (34.5 bar)
Thread size: 1/2” NPT (15 mm BSPT)
Nominal K-factor: 5.6 U.S. (80.6 metric*)
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
* Metric K-factor measurement shown is in Bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.
Material Standards:
Sprinkler Body: Brass CW602N, UNS-C84400 or QM Brass
Deflector: Stainless Steel UNS S30400
Pip Cap Shell - Stainless Steel UNS-S44400
Pip Cap Disc - Stainless Steel UNS-S30100
Belleville Spring - Nickel Alloy
Pip Cap Seal - Polytetrafluoroethylene (PTFE)
Compression Screw: Brass CW612N, CW508L, UNS-C36000 or UNS-C26000
Shipping Cap: Polyethylene
Bulb: Glass, nominal 5 mm diameter
Ordering Information: (Refer to Table 1 and the current Viking List Price Book.)
4. INSTALLATION
Refer to appropriate NFPA, FM Global, and/or any other applicable installation standards.
NOTICE
Risk of permanent damage.
Over-tightening the sprinkler can cause permanent damage.
> Tighten the sprinkler to a MAXIMUM torque of 14 ft-lbs. (19.0 N-m).
5. OPERATION
During fire conditions, when the temperature around the sprinkler reaches its operating temperature, the heat-sensitive liquid in the
glass bulb expands, causing the bulb to shatter, releasing the pip cap assembly. Water flowing through the sprinkler orifice strikes
the sprinkler deflector, forming a uniform spray pattern to extinguish or control the fire.
Replaces Form No. F_020416 Rev. 21.3
(Added LPCB and VDS details)
