low pressure water mist nozzle


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

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

24.50 l/min

Nominal density

2.45 mm/m2


4.00 m x 5.00 m 2 nozzles in the cabin


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 open public spaces is unique as it requires very low water pressures and water flow rates. The system utilized the automatic low-pressure water mist nozzles Model OH-CA which are patented automatic, fine water spray nozzles. The OH-CA 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-CA has been tested in accordance with IMO Resolution MSC.265(84) for cabins. The FIREKILL™ NEPTUN OH-CA can therefore be used for IMO Occupancy classification (6) Accommodation space minor fire risk, (7) Accommodation spaces of moderate fire risk, (9) Sanitary & similar spaces