Viking MICROMATIC VK145 Technical Data Manual

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
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1. DESCRIPTION
The Viking Micromatic
thermosensitive, glass-bulb spray sprinkler available in several different finishes,
temperature ratings, and K-factors to meet design requirements. The special Polyester
and Electroless Nickel PTFE (ENT) coatings can be used in decorative applications
where colors are desired. In addition, these coatings have been investigated for
installation in corrosive environments and are listed/approved as indicated in the Approval
Chart(s). Viking standard response sprinklers may be ordered and/or used as open
sprinklers (glass bulb and pip cap assembly removed) on deluge systems. Refer to
Ordering Instructions.
2. LISTINGS AND APPROVALS
FM Approved: Class Series 2000
VdS Approved: Certificate G414003 and G4980001
LPCB Approved: Certificate 096e/06
CE: Standard EN 12259-1, DOP Sprinklers_LPCB_5-2-19 and DOP_VK145ENT_25-5-20
China Approval: Approved according to China GB standard.
MED Certified: Standard EN 12259-1, EC-certificate 0832-MED-1003

NOTE: Other International approval certificates are available upon request.
Refer to Approval Chart(s) and Design Criterion for Listing and Approval requirements that must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: 7 psi (0.5 bar)*
Maximum Working Pressure: 175 psi (12 bar) wwp
Factory tested hydrostatically to 500 psi (34.5 bar)
Thread size: 1/2" NPT, 15 mm BSPT
Nominal K-factor: 5.6 U.S. (80.6 metric**)
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
Overall Length: 2-3/16" (56 mm)
*cULus Listing, FM Approval, and NFPA 13 installs require a minimum of 7 psi (0.5 bar). The minimum operating pressure for LPCB and CE
Approvals ONLY is 5 psi (0.35 bar).
** Metric K-factor measurement 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-C23000 or Phosphor Bronze UNS-C51000
Bulb: Glass, nominal 5 mm diameter
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Screw: Brass UNS-C36000
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
For Polyester Coated Sprinklers: Belleville Spring-Exposed
For ENT Coated Sprinklers: Belleville Spring-Exposed, Screw and Pip Cap-ENT Coated
Ordering Information: Refer to Table 1.
4. INSTALLATION
Refer to appropriate NFPA Installation Standards.
5. OPERATION
During fire conditions, the heat-sensitive liquid in the glass bulb expands, causing the glass to shatter, releasing the pip cap and
sealing spring assembly. Water flowing through the sprinkler orifice strikes the sprinkler deflector, forming a uniform spray pattern
to extinguish or control the fire.
Form No. F_032714 Rev 01
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Standard Response Upright Sprinkler VK145 is a small,
®
August 2023
MICROMATIC STANDARD
®
RESPONSE UPRIGHT
SPRINKLER VK145 (K5.6)
Replaces Form No. F_032714 Rev 20.1
(updated material specifications)
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