Viking VK680 Technical Data Manual

QUICK RESPONSE

TECHNICAL DATA

EXTENDED COVERAGE

CONCEALED HSW

SPRINKLER VK680 (K8.0)

The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058

Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [e-mail]

Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com.

1. DESCRIPTION

Viking QREC Concealed Horizontal Sidewall Sprinkler VK680 is a small high­sensitivity solder link and lever sprinkler designed for installation on concealed pipe
systems, where the appearance of a smooth wall is desired. The fast response
operating element and special flow shaper characteristics meet the challenges of
quick response extended coverage standards.

The sprinkler is hidden from view by a low profile, small diameter cover plate installed
flush to the wall. The cover plate is available in several decorative finishes to meet
design requirements. The two-piece design allows installation and testing of the
sprinkler prior to installation of the cover plate. After the system has been tested and
wall finish has been applied, the push-on design of the cover plate assembly allows
easy installation of the cover plate with up to 1/4” (6.4 mm) adjustment.

2. LISTINGS AND APPROVALS

cULus Listed: Category VNIV

CCCF Approved: Approved by the China Certification Center for Fire

Products (CCCF)

Refer to the Approval Chart and Design Criteria on this Technical Data Page
for cULus Listing requirements that must be followed.

For Light Hazard Occupancies Only

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3. TECHNICAL DATA

Specications:

Available since 2011.
Minimum Operating Pressure: 7 psi (0.5 bar)
Maximum Working Pressure: 175 psi (12 Bar). Factory tested hydrostatically to 500 psi (34.5 bar).
Thread size: 3/4” (20 mm) NPT
Nominal K-Factor: 8.0 U.S. (115.2 metric†)

† Metric K-factor measurement is in Bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.

Available Cover Plate Horizontal Adjustment: 1/4” (6.4 mm)
Overall Length (Sprinkler Body): 2” (50.8 mm)
Patents Pending

Material Standards:

Sprinkler Body: QM Brass and Brass UNS-C84400
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with Teflon Tape
Seat: Brass UNS-C31400
Deflector Ring: Brass UNS-C23000
Deflector Pins: Stainless Steel UNS-S30200
Halo: Brass UNS-C31400 or Phosphor Bronze UNS-C51000
Flow Shaper: Phosphor Bronze UNS-C51000
Lever Bar Ring: Brass UNS-C31400 or Brass UNS-C84400
Compression Screw: 18-8 Stainless Steel
Fusible Link Assembly: Nickel Alloy and Eutectic Solder
Fusible Link Levers: Stainless Steel UNS-S31600
Guide Pin: Stainless Steel UNS-S43000
Shipping Cap: Polyethylene

Cover Assembly Materials:

Cover Plate Assembly: Copper UNS-C11000 and Brass UNS-C26800
Spring: Beryllium Nickel
Solder: Eutectic

Form No. F_050611 18.10.25 Rev 17.1.P65

Replaces Form No. F_050611 Rev 17.1

(Added P65 Warning.)

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QUICK RESPONSE

TECHNICAL DATA

EXTENDED COVERAGE

CONCEALED HSW

SPRINKLER VK680 (K8.0)

The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058

Telephone: [phone] Technical Services: 877-384-5464 Fax: [phone] Email: [e-mail]

Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com.

Ordering Information: (Also refer to the current Viking price list.)
Viking QREC Concealed HSW Sprinkler VK680 and Cover Plate Assembly must be ordered separately:

Sprinkler: Part No. 17114AC (includes a 165 °F (74 °C) temperature rated sprinkler with a protective plastic cap covering the unit).
Cover Plate Assembly: Base Part No. 16207 (3-5/16” diameter)

Specify finish and temperature rating of the cover plate assembly by adding the appropriate suffixes for the finish and the cover

temperature rating to the base part number:
Finish Suffix: Polished Chrome = F, Painted White = M-/W, Painted Ivory = M-/I, Painted Black = M-/B
Temperature Suffix: 135 °F (57 °C) = A
For example, cover 16207 with a Polished Chrome finish and a 135 °F (57 °C) temperature rating = 16207FA.

Available Finishes And Temperature Ratings: Refer to Table 1.
Accessories: (Also refer to the Viking website.)

Sprinkler Wrenches**:

A. Heavy Duty Wrench Part No. 16208W/R (available since 2010)
B. Head Cabinet Wrench Part Number 16267*** (available since 2010)
C. Optional Large Concealed Cover Plate Installer Tool Part No. 14867 (available since 2007)

**Requires a ½” ratchet (not available from Viking).
***Ideal for sprinkler cabinets.

Sprinkler Cabinet: Part No. 01731A (available since 1971)

4. INSTALLATION

Refer to appropriate NFPA Installation Standards.

5. OPERATION

During fire conditions, when the temperature around the sprinkler approaches its operating temperature, the cover plate detaches.
Continued heating of the exposed sprinkler causes the fusible element to disengage, releasing the sealing assembly. Water flowing
through the sprinkler orifice strikes the flow shaper, 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 requirements.

7. AVAILABILITY

The Viking Model VK680 Sprinkler is 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.

All custom color painted cover plates will have an identifying label affixed

Form No. F_050611 18.10.25 Rev 17.1.P65

to the inside of the cover that indicates the custom color and will have a

Figure 1: Identification of Custom Paint for Concealed Covers

representative sample (a paint dot) of the paint on the label.