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MICROFAST

®

 QUICK 

RESPONSE FUSIBLE 

ELEMENT PENDENT 

SPRINKLER VK353 (K8.0)

TECHNICAL DATA

Page 2 of 6

Form No. F_071814   19.02.21   Rev 19.1

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.

4.  INSTALLATION

Refer to appropriate NFPA Installation Standards.

5.  OPERATION

During fire conditions, the heat-sensitive fusible element assembly disengages, releasing the seat and spring assemblies to open 

the waterway. Water flowing through the sprinkler orifice strikes the sprinkler deflector, 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 Microfast

®

 Quick Response Pendent Sprinkler VK353 is available through a network of domestic and international dis-

tributors.  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.

Figure 1:  Standard Sprinkler Wrench 21475M/B

Protective Sprinkler 

Clip

Wrench Flat

Summary of Contents for 139676

Page 1: ...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 C1...

Page 2: ...ges releasing the seat and spring assemblies to open the waterway Water flowing through the sprinkler orifice strikes the sprinkler deflector forming a uniform spray pattern to extinguish or control t...

Page 3: ...ed not available from Viking TABLE 1 AVAILABLE SPRINKLER TEMPERATURE RATINGS AND FINISHES Sprinkler Temperature Classification Sprinkler Nominal Temperature Rating1 Maximum Ambient Ceiling Temperature...

Page 4: ...ecessed Escutcheon Footnotes 1 Base part number shown For complete part number refer to Viking s current price schedule 2 Metric K factor measurement shown is when pressure is measured in Bar When pre...

Page 5: ...ressure is measured in Bar When pressure is measured in kPa divide the metric K factor shown by 10 0 3 This table shows the FM Approvals available at the time of printing Other approvals may be in pro...

Page 6: ...Figure 4 Sprinkler Dimensions with the Model E 1 and E 2 Recessed Escutcheons Figure 3 Sprinkler Dimensions with a Standard Escutcheon 3 4 NPT 20 mm 2 5 16 59 mm 1 3 4 45 mm Installed with a standard...

Page 7: ...tall 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 fitti...

Page 8: ...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 sprinkle...

Page 9: ...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 sprinkle...

Page 10: ...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...

Page 11: ...tion 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 s...

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