General
Description
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 of3/8inch (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. They
are 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.
It is recommended that the end user be
consulted with respect to the suitability
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.
The Type HV Nozzles are a redesigna-
tion for the Gem Type HV.
WARNINGS
The Type HV Nozzles described
herein must be installed and main-
tained in compliance with this docu-
ment, as well as with the applicable
standards of the National Fire Protec-
tion Association, in addition to the
standards of any other authorities hav-
ing jurisdiction. Failure to do so may
impair the performance of these de-
vices.
The design of individual water spray
fixed systems can vary considerably,
depending on the characteristics and
nature of the hazard, the basic pur-
pose of the spraying system, the con-
figuration of the hazard, and wind/draft
conditions. Because of these vari-
ations as well as the wide range of
available nozzle spray characteristics,
the design of water spray fixed sys-
tems for fire protection must only be
performed by experienced designers
who thoroughly understand the limita-
tions as well as capabilities of such
systems.
The owner is responsible for maintain-
ing their fire protection system and de-
vices in proper operating condition.
The installing contractor or sprinkler
manufacturer should be contacted
with any questions.
Page 1 of 6 TFP815
APRIL, 2006
Type HV
Directional Spray Nozzles, Open,
High Velocity
Technical Services: Tel: (800) 381-9312 / Fax: (800) 791-5500
IMPORTANT
Always refer to Technical Data
Sheet TFP700 for the “INSTALLER
WARNING” that provides cautions
with respect to handling and instal-
lation of sprinkler systems and com-
ponents. Improper handling and in-
stallation can permanently damage
a sprinkler system or its compo-
nents and cause the nozzle to fail to
operate in a fire situation.
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