POK English catalogue (USA)

POK France - ZI Les Guignons - 10400 Nogent-sur-Seine - FRANCE Tel: +33 (0)3 25 39 84 78 - Fax: +33 (0)3 25 39 84 90 - Email: export@pok.fr - Web: www.pok.fr 310 Fire nozzles flow rate The flow through a firefighting nozzle is determined by the formula : (Torricelli’s Formula) in which : Qv = Volumetric flow (m²/s) S = Area of the nozzle tip (m²) g = Acceleration of the weight (9,81 m/s²) H = Monometric height in meters (m) Manometric Height (Formula) in which : P = Pressure of the nozzle ρ = Volumetric Mass (kg/m 3 ) : example water = 1000 kg/m 3 Therefore : Flow through the Nozzle (Formula) Qv = Flow through the nozzle (lpm) d = Diameter of the nozzle tip (mm) P = Pressure of the nozzle (bar) Q v Ø d Pressure P Pressure (bar - PSI) Flow rate (lpm - GPM) 1 2 3 4 5 6 7 8 9 10 12 14 16 14.5 29 43.5 58 72.5 87 101.5 116 130.5 145 174 203 232 10 - 2.6 20 - 5.3 30 - 7.9 40 - 10.6 50 - 13.2 100 - 26.4 200 - 52.8 300 - 79.3 400 - 105.7 1000 - 264.2 2000 - 528.3 3000 - 792.5 4000 - 1056.7 5000 - 1320.9 10 000 - 2641.7 Diameter of nozzle tip (mm - inch) 500 - 132.1 56 - 2.20 50 - 1.97 40 - 1.57 35 - 1.38 30 - 1.18 24 - 0.94 18 - 0.71 14 - 0.55 12 - 0.47 8 - 0.31 Flow rates through Firefighting Nozzles, by pressure and nozzle tip diameter