POK English catalogue (Complete)

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 430 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) Flow rate (lpm) 1 2 3 4 5 6 7 8 9 10 12 14 16 10 20 30 40 50 100 200 300 400 1000 2000 3000 4000 5000 10 000 Diameter of nozzle tip (mm) 500 56 50 40 35 30 24 18 14 12 8 Flow rates through Firefighting Nozzles, by pressure and nozzle tip diameter