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Storage Sprinklers

VK531 - QR ELO Upright Sprinkler (Storage-Density/Area) (K11.2)View larger

VK531 - QR ELO Upright Sprinkler (Storage-Density/Area) (K11.2)

The Viking Quick Response Extra-Large Orifice Upright Sprinkler VK531 is a thermosensitive glass bulb spray sprinkler available in several different finishes and temperature ratings to meet design requirements.  The extra-large orifice provides greater flows at lower pressures than standard orifice or large orifice sprinklers. This feature allows reduced pipe sizing for hydraulically calculated sprinkler systems, which require high densities of water.  Viking Quick Response Extra-Large Orifice Sprinklers may eliminate the need for a fire pump or reduce the size of the pump if it is required.

The Viking Quick Response Extra-Large Orifice Upright Sprinkler VK531 is a thermosensitive glass bulb spray sprinkler available in several different finishes and temperature ratings to meet design requirements.  The extra-large orifice provides greater flows at lower pressures than standard orifice or large orifice sprinklers. This feature allows reduced pipe sizing for hydraulically calculated sprinkler systems, which require high densities of water.  Viking Quick Response Extra-Large Orifice Sprinklers may eliminate the need for a fire pump or reduce the size of the pump if it is required.

Technical Details

  • Maximum Spacing : Per Standards / Listings
  • Maximum Working Pressure : 175 psi (12 bar)
  • Minimum Spacing : Per Standards / Listings
  • Model Number : VK531
  • Occupancy Type : Light Hazard, Ordinary Hazard, Storage
  • Response Type : Quick
  • Thread Size : 3/4" NPT (20 mm BSP)

Product Information

The Viking Quick Response Extra-Large Orifice Upright Sprinkler VK531 is a thermosensitive glass bulb spray sprinkler available in several different finishes and temperature ratings to meet design requirements.  The extra-large orifice provides greater flows at lower pressures than standard orifice or large orifice sprinklers. This feature allows reduced pipe sizing for hydraulically calculated sprinkler systems, which require high densities of water.  Viking Quick Response Extra-Large Orifice Sprinklers may eliminate the need for a fire pump or reduce the size of the pump if it is required.

ExampleDensityStd CMDA Spk Spacing(Q) Flow Rate / Sprinkler(P) Starting PressureExample Water Demand (2,000 ft2 design area)
0.3 gpm/ft2100 ft230 gpm7.2 psi600 gpm
0.4 gpm/ft2100 ft240 gpm12.8 psi800 gpm
0.5 gpm/ft2100 ft250 gpm19.9 psi1,000 gpm
0.6 gpm/ft2100 ft260 gpm28.7 psi1,200 gpm
0.7 gpm/ft2100 ft270 gpm39.1 psi1,400 gpm
0.8 gpm/ft2100 ft280 gpm51.0 psi1,600 gpm

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