POK, full catalogue English

511 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 reaction force The value of the reaction force of a firefighting hand nozzle is determined by the formula : Reaction Force of a Firefighting nozzle In which : Qm = Mass Flow (Kg/s) Qv = Volumetric Flow (m²/s) = Volumetric Mass (kg/m 3 ) : example water = 1000 kg/m 3 v = Velocity of the water at the nozzle tip (m/s) (Torricelli’s Formula) In which : S = Bore passage surface area (m²) g = Acceleration of gravity (9,81 m/s²) H = Head in meters (m) Therefore : Reaction of the Nozzle (Formula) F = Force of Reaction (daN) d = Bore diameter (mm) P = Pressure at the nozzle (bar) Ø d v F Pressure (bar) Reaction Force (daN) 1 2 3 4 5 6 7 8 9 10 12 14 16 1 2 3 4 5 10 20 30 40 50 100 200 300 400 500 1 000 Bore diameter (mm) 12 8 14 18 24 30 35 40 50 56 Firefighting hand nozzles reaction force, as a function of pressure and bore diameter