General
Description
The Mulsifyre Nozzles are open (non-
automatic) nozzles and they are de-
signed for use in water spray fixed
systems for fire protection applications
where a high velocity water application
may be required. There are two con-
figurations: the basic Mulsifyre Nozzle
shown in Figure 1 and the Mulsifyre
Nozzle with Model F880 Dust Cap
shown in Figure 2. Each configuration
is available in six different models that
provide a wide range of orifice sizes
and water distribution characteristics.
The Mulsifyre Nozzles are internal
scroll type nozzles and they discharge
a uniformly filled cone of relatively high
velocity water droplets. Although the
Mulsifyre Nozzles are designed pri-
marily for use in fire extinguishment
and control, they can also be used for
exposure protection.
The Mulsifyre Nozzles are typically
used in water spray fixed systems for
the protection of special hazards such
as:
• oil filled transformers and switching
equipment,
• flammable liquid and gas storage
tanks,
• chemical process equipment,
• conveyor systems,
• openings in fire walls, and
• other equipment that is defined as
hazardous due to the possibility of a
rapidly spreading fire.
Mulsifyre Nozzles with Model F880
Dust Caps are used in applications
where protection is required against
insect infestation or accumulation of
debris within the nozzle. The Dust Cap
is designed for both indoor and out-
door use.
It is recommended thattheend 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 Model F822 thru F834 Mulsifyre
Nozzles are a redesignation for the
Gem Model F822 thru F834.
WARNINGS
The Mulsifyre 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 TFP810
APRIL, 2006
Model F822 thru F834 Mulsifyre
®
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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