low pressure water mist nozzle


The FIREKILL™ NEPTUN OH-CO Low pressure water mist nozzle tested and approved Resolution MSC.265(84) for corridor.

Min. water pressure

6 bar ≈87 psi

Max. working pressure

16 bar ≈232 psi

Drop size

DV90 < 300 μm

Water capacity design

According to IMO MSC. 265(84)

kv metric


flow rate at min pressure

38 l/min

Nominal density 1.5 m wide corridor

8.50 mm/m2


1.50 m x 3.00 m


Aesthetic fire protection

The FIREKILL™ NEPTUN OH nozzles are installed recessed into the ceiling with the nozzle rosette flush with the surface and the nozzle Cover Plate protruding 10-15 mm from the surface, being the only visible parts of the nozzle in its daily use or directly into a visible pipe system in retrofit cases. The FIREKILL™ NEPTUN OH nozzles can be delivered in different paint and finishes making the system blend in with almost any type of surface, securing the aesthetics of the surroundings.



The FIREKILL™ NEPTUN OH system for protection of corridors is unique as it requires very low water pressures and water flow rates. The system utilizes the automatic low-pressure water mist nozzles Model OH-CO which are patented automatic, fine water spray nozzles. The OH-CO nozzle creates a homogenous fine water mist, which absorbs heat, reduces radiant heat and causes oxygen depletion near the fire, which in turn controls and suppresses the fire. This homogenous mist consists of a high concentration of very small droplets. Because of the small mass of the droplets, the nozzle creates a large coverage, further minimizing the water expenditures and hydrating nearby combustibles.

Test and Approvals

DnV MED-B and UK MER-B Approval

The FIREKILL™ NEPTUN OH-CO has been tested in accordance with IMO Resolution MSC.265(84) for corridors. The FIREKILL™ NEPTUN OH-CO can therefore be used for IMO Occupancy classification (2) Stairways, (3) Corridors