background image

MICROFAST

®

 QUICK 

RESPONSE FUSIBLE 

ELEMENT CONVENTIONAL 

SPRINKLER VK311 (K5.6)

TECHNICAL DATA

Page 1 of 3

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

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

Form No. F_022614     18.11.05     Rev 17.1.P65

1.  DESCRIPTION

The Viking Microfast

®

 Quick Response Fusible Element Conventional Sprinkler VK311 is a small, 

thermosensitive, solder link spray sprinkler available in several different finishes, and tempera-

ture ratings to meet design requirements. The special Polyester coatings can be used in decora-

tive applications where colors are desired.

2.  LISTINGS AND APPROVALS

  cULus Listed: 

Category VNIV

Refer to Approval Chart 1 and Design Criteria on for cULus Listing requirements.

3.  TECHNICAL DATA

Specifications:

Minimum Operating Pressure: 7 psi (0.5 bar)

Maximum Working Pressure: 175 psi (12 bar) 

Factory tested hydrostatically to 500 psi (34.5 bar)

Testing: U.S.A. Patent No. 4,831,870

Thread size: Refer to the Approval Chart

Nominal K-Factor: 5.6 U.S. (80.6 metric*)

 

Overall Length: 2-3/16” (56 mm)

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

Material Standards:

Frame Casting: Brass UNS-C84400 or QM Brass

Deflector: Brass UNS-C26000

Fusible Element Assembly: Nickel Alloy

Trigger and Support: Stainless Steel UNS-S31600

Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape

Seat and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400

Screw: Brass UNS-C36000

For Polyester Coated Sprinklers:

 

Belleville Spring-Exposed

Ordering Information:

 (Also refer to the current Viking price list.)

Order Quick Response Fusible Element Conventional Sprinklers by first adding the appropriate suffix for the sprinkler finish and 

then the appropriate suffix for the temperature rating to the sprinkler base part number. 

Finish Suffix: Brass = A, Chrome = F, White Polyester = M-/W, and Black Polyester = M-/B

Temperature Suffix (°F/°C): 165°/74° = C, 205°/96° = E, and 280°/138° = G

For example, sprinkler VK311 with a Brass finish and a 165 °F/74 °C temperature rating = Part No. 19392AC

Available Finishes And Temperature Ratings:

 

Refer to Table 1

Accessories:

 (Also refer to the Viking website.)

Sprinkler Wrenches:

Standard Wrench: Part No. 21475M/B (available since 2017)

 

Sprinkler Cabinets:

A. Six-head capacity: Part No. 01724A (available since 1971)

B. Twelve-head capacity: Part No. 01725A (available since 1971)

4.  INSTALLATION

Refer to appropriate NFPA Installation Standards.

Replaces form F_071614 Rev. 17.1

(Added P65 Warning.)

Summary of Contents for MICROFAST VK311

Page 1: ...r When pressure is measured in kPa divide the metric K factor shown by 10 0 Material Standards Frame Casting Brass UNS C84400 or QM Brass Deflector Brass UNS C26000 Fusible Element Assembly Nickel Alloy Trigger and Support Stainless Steel UNS S31600 Belleville Spring Sealing Assembly Nickel Alloy coated on both sides with PTFE Tape Seat and Insert Assembly Copper UNS C11000 and Stainless Steel UNS...

Page 2: ...ernational 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 TABLE 1 AVAILABLE SPRINKLER TEMPERATURE RATINGS AND FINISHES Sprinkler Temperature Classification Sprinkler Nominal Temperature Rating1 Maximum Ambient Ceiling Temperatu...

Page 3: ...ured 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 Other colors are available on request with the same Listings and Approvals as the standard colors DESIG...

Page 4: ...stall sprinklers onto piping at the floor level Install sprinklers after the piping is in place to prevent mechanical damage DO NOT allow impacts such as hammer blows directly to sprinklers or to fittings pipe or couplings in close proximity to sprinklers Sprinklers can be damaged from direct or indirect impacts DO NOT attempt to remove drywall paint etc from sprinklers Take care not to over tight...

Page 5: ...D CAPS MUST BE REMOVED FROM SPRINKLERS BEFORE PLACING THE SYSTEM IN SERVICE Figure 1 Sprinkler shield being removed from a pendent sprinkler Figure 2 Sprinkler cap being removed from a pendent sprinkler Figure 3 Sprinkler cap being re moved from and upright sprinkler HOW TO REMOVE SHIELDS AND CAPS No tools are necessary to remove the shields or caps from sprinklers DO NOT use any sharp objects to ...

Page 6: ... these sprinklers NOTE The protective cap is temporarily removed during installation and then placed back on the sprinkler for protection until finish work is completed Do not over tighten the sprinklers into fittings during installation Do not use the sprinkler deflector to start or thread the sprinklers into fittings during installation Do not attempt to remove drywall paint etc from the sprinkl...

Page 7: ...t the corrosion resistant properties of the sprinkler Use care when locating sprinklers near fixtures that can generate heat Do not install sprinklers where they would be exposed to temperatures exceed ing the maximum recommended ambient temperature for the temperature rating used Inspect the coated sprinklers frequently soon after installation to verify the integrity of the corrosion resistant co...

Page 8: ...ction of fire protection products are provided herin as they relate to legally mandated jurisdictional regions WARNING STATE OF CALIFORNIA USA Installing or servicing fire protection products such as sprinklers valves piping etc can expose you to chemicals including but not li mited to lead nickel butadiene titaninum dioxide chromium carbon black and acrylonitrile which are known to the State of C...

Reviews: