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The Type HV Nozzles are open (non-automatic) directional spray nozzles with individual inlet strainers. They are
designed for use in water spray fixed systems for fire protection applications where a high velocity water application
may be required, such as for the pro-tection of flammable liquids.
The Type HV Nozzles feature an inte-gral strainer for use when the Authority Having Jurisdiction (other than NFPA applications) requires the use of indi-vidual strainers in addition to main pipeline strainers for nozzles having an orifice diameter of 3/8 inch (9,5 mm) or less.
Available in brass or stainless steel, the six patterns of the Type HV Noz-zles provide a wide variety of orifice
sizes and distribution characteristics. As water passes through the internal
swirl plate, a swirling action is pro-duced, prior to the water being dis-charged through the orifice tip of the
body, resulting in a solid conical spray pattern of water droplets being dis-charged over a defined area.
High velocity type nozzles are princi-pally used in water spray systems for the protection of fixed hazards such as
transformers, circuit breakers, diesel engines and diesel storage tanks, turbo alternators, lube oil systems, oil
fire boilers, and similar hazards. Theyare capable of rapidly extinguishing oil fires by emulsification, cooling, and
smothering. The surface cooling ef-fects of high velocity type nozzles also minimizes the possibility of reignition
after a fire extinguishment.
of the materials of construction for any given corrosive environment. The ef-fects of ambient temperature, concen-tration of chemicals, and gas/chemical velocity, should be considered, at a minimum, along with the corrosive na-ture to which the nozzles may be ex-posed.