Description

RRZ – Tunnel Firefighting Nozzle The new RRZ firefighting nozzle generates an atomized water cone with a large ground cover. This device works with a multi-orifice head connected to a shaft, driven to rotation by a hydraulic turbine. The operating principle is simple. A suitably sized impeller has the task of transforming the tangential thrust of a water jet into torque applied to a shaft. The delivery fluid is therefore enough to actuate the turbine operation, which takes advantage of the pressurized water either to rotate and to generate the spray of the multi-orifice head.
The high rotation makes an atomized water cloud, uniformly distributed over a perfect circumference. The simple construction makes it an easy and fast product in all installation and maintenance operations

TUNNEL FIREFIGHTING 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 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 are available depending on projects requirements. The multi-orifice head can achieve an instant 180° spray angle, with an 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 coarse drop diameter. At higher pressures (around 5 bar), atomization is favoured by a considerable reduction in drop diameter, which creates a very fine rain effect on the ground.