POK, full catalogue English

510 POK SAS - 18 Cours Antoine Lavoisier - 10400 Nogent-sur-Seine - FRANCE Phone: +33 (0)3 37 49 53 - 000 - Email: export@pok-fire.com - Web: www.pok-fire.com Fire hand nozzles flow rate The flow rate passing through a firefighting hand nozzle is determined by the formula : (Torricelli’s Formula) in which : Qv = Volumetric flow rate (m²/s) S = Bore passage surface area (m²) g = Acceleration of gravity (9,81 m/s²) H = Head in meters (m) Head Height (Formula) in which : P = Pressure at the nozzle ρ = Volumetric Mass (kg/m 3 ) : example water = 1000 kg/m 3 Therefore : Flow rate through the Nozzle (Formula) Qv = Flow rate through the nozzle (lpm) d = Bore diameter (mm) P = Pressure at 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 Bore diameter (mm) 500 56 50 40 35 30 24 18 14 12 8 Firefighting hand nozzles flowrates, as a function of pressure and bore diameter