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

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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.

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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

ExampleDensity	Std CMDA Spk Spacing	(Q) Flow Rate / Sprinkler	(P) Starting Pressure	Example Water Demand (2,000 ft² design area)
0.3 gpm/ft²	100 ft²	30 gpm	7.2 psi	600 gpm
0.4 gpm/ft²	100 ft²	40 gpm	12.8 psi	800 gpm
0.5 gpm/ft²	100 ft²	50 gpm	19.9 psi	1,000 gpm
0.6 gpm/ft²	100 ft²	60 gpm	28.7 psi	1,200 gpm
0.7 gpm/ft²	100 ft²	70 gpm	39.1 psi	1,400 gpm
0.8 gpm/ft²	100 ft²	80 gpm	51.0 psi	1,600 gpm