RRZ TUNNEL FIREFIGHTING NOZZLE – TURBINE FOR HIGHWAY TUNNELS FIRE PROTECTION
To meet the urgent requirements for improving fire safety in highway, road and railway tunnels, PNR Italy created a special nozzle that fully satisfies the needs of design engineers.
The RRZ Tunnel Firefighting Nozzle can deliver a high capacity jet (130 lpm) and a remarkable spray coverage (an area with a diameter of 12 meters at its normal installation level), able to deliver fine or very fine droplets even if it is fed at a pressure of 5 bar. Models with different flow rate and spray coverage, depending on projects requirements.
The multi-orifice head is able to achieve an instant 180° spray angle that quickly converts into a full-size, with a quality of atomized spray increasing when pressure increases. At low pressures (from 1 to 2 bar), a wider wetting radius is achieved, up to 6 m., while maintaining a rather coarse drop diameter. At higher pressures (around 5 bar), atomization is favored by a considerable reduction in drop diameter, which creates a very fine rain effect on the ground.