TECHNICAL DATA
Page 1 of 4
MICROFAST HP
FIXED TEMPERATURE
RELEASE VK800
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: techsvcs@vikingcorp.com
Form No. F_051091 18.10.25 P65
1. DESCRIPTION
The Viking MicrofastHP® Fixed Temperature Release is a xed-temperature, heat-responsive
device. It is designed for use on pilot line release systems to activate deluge and preaction sys-
tems. The xed temperature release is equipped with a 3 mm glass bulb and is available in sev-
eral nishes and temperature ratings to meet design requirements. The special Polyester and
Teon® coatings can be used in decorative applications where colors are desired. In addition,
these two nishes are listed as corrosion-resistant nishes and provide protection against many
corrosive environments. The xed temperature release design closely resembles the Model M
frame-style sprinkler design, but is easily identied by its special listing information plate. This
is important when xed-temperature releases are installed along with sprinklers below ceilings
on concealed systems.
2. LISTINGS AND APPROVALS
UL listed Guide No. VLTR for use under smooth, at, horizontal ceilings. Meets FM require-
ments when spaced according to NFPA 13 and FM Global recommendations. See Design
Guidelines.
3. TECHNICAL DATA
Specifications:
Thread Size: ½” (15 mm) NPT
Glass-bulb uid temperature rated to -65 °F (-55 °C).
Rated to 250 PSI (1 724 kPa) water working pressure.
Factory tested hydrostatically to 500 PSI (3 448 kPa).
Testing: USA Patent No. 4,831,870
Material Standards:
Frame: Brass Castings UNS-C84400
Bulb: Glass, nominal 3 mm diameter
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with Teon Tape
Screw: Brass UNS-36000
Pip Cap: Copper UNS-C11000 and Stainless Steel UNS-S30400
Polyester-Coated Releases:
Spring: exposed
Teon®-Coated Releases:
Spring: exposed
Screw: Brass UNS-C36000, nickel plated
Pip Cap: Copper UNS-C11000 and Stainless Steel UNS-S30400, Teon® coatedACCESSORIES
Refer to the “Sprinkler Accessories” section for wrench, escutcheons, and other accessories.
Ordering Information: (Also refer to the current Viking price list.)
Order MicrofastHP® Fixed Temperature Release by rst adding the appropriate sufx for the sprinkler nish and then the appropriate
sufx for the temperature rating to the sprinkler base part number.
Finish Sufx: Brass = A, Chrome-Enloy® = F, White Polyester = M-/W and Black Teon = N
Temperature Sufx (°F/°C): 135°/57° = A, 155°/68° = B, 175°/79° = D, 200°/93° = E, 286°/141° = G
For example, Fixed Temperature Release VK800 with a Brass nish and a 155 °F/68 °C temperature rating = Part No. 07848AB
Available Finishes And Temperature Ratings: Refer to Table 1
Accessories: (Also refer to the “Sprinkler Accessories” section of the Viking data book.)
Sprinkler Wrench - Part No. 10896W/B
4. DESIGN AND INSTALLATION
I. Design Guidelines
Viking Fixed Temperature Releases are intended for use on hydraulic or pneumatic pilot line release systems in deluge or preaction
sprinkler systems. Consult required installation standards, approving agencies, and the Authorities Having Jurisdiction requirements
when designing pilot line release systems. Do not exceed the minimum manufacturer’s recommendations listed below.
A. Temperature Rating:
1. The temperature rating of the fixed temperature release should be as close as possible to a temperature that is at least 20 °F
higher than the highest ambient ceiling temperature. Refer to the Approval Chart.
2. For localized high ambient temperatures such as those caused by unit heaters and skylights, substitute higher temperature-rated
Viking Technical Data may be found on
The Viking Corporation’s Web site at
http://www.vikinggroupinc.com.
The Web site may include a more recent
edition of this Technical Data Page.
Replaces Form No. F_051091 Rev June 15, 2007
(Added P65 Warning.)
To Next Page
Need help?
General
