TECHNICAL DATA
QUICK RESPONSE
EXTENDED COVERAGE
CONCEALED HSW
SPRINKLER VK680 (K8.0)
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.
Form No. F_050611 18.10.25 Rev 17.1.P65
Page 1 of 5
1. DESCRIPTION
Viking QREC Concealed Horizontal Sidewall Sprinkler VK680 is a small high-
sensitivity 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.
3. TECHNICAL DATA
Specifications:
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
Replaces Form No. F_050611 Rev 17.1
(Added P65 Warning.)
For Light Hazard Occupancies Only
