Dual-purpose Type Nozzle
SOLAS 1974, as amended
B、 Technical parameter
Nominal Diameter: 40mm
Working pressure range： 2-16Bar
When in use the discharge end of the hose will be fitted with a nozzle so that the operator may control the manner in which water is projected at a fire. Standard nozzle sizes are 12 mm, 16 mm and 19 mm.
Spray nozzles must be capable of producing a plain jet without spread and have a throw of at least 12 m. The spray must produce a reasonably fine spray which can form a curtain, from behind which it is possible to approach a fire. The spray pattern would have a diameter of, say, 5 m at a distance of 2 m from the nozzle.
A standard type of nozzle which by a twist-grip operation is able to shut off the hose discharge or deliver it as a jet or spray according to the operator’s desire. Some diffuser nozzles also have a water curtain capability.
When large volumes of water are used for fire fighting consideration must be given to the stability of the vessel.
Pressure Drop Bar
Discharge Rate at
Type Dual-Purpose Nozzle
NAKAJIMA Type Dual-Purpose Nozzle
MACHINO Type Dual-Purpose Nozzle
STORZ Type Dual-Purpose Nozzle
ANSI Type Dual-Purpose Nozzle
JOHN MORRIS Type Dual-Purpose Nozzle
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