Tyco D4a Manual

Type D4a Protectospray
Directional Spray Nozzles, Open,
Medium Velocity
General
Description
The TYCO Type D4a PROTECTO-
SPRAY Nozzles are open (non-auto-
matic) directional spray nozzles and
they are designed for use in water
spray fixed systems for fire protection
applications. They are external deflec-
tor-type nozzles that discharge a uni-
formly filled cone of medium velocity
water droplets. The Type D4a Nozzles
feature a four arm body design that
helps assist against mechanical or
physical damage similar to a sprinkler
guard used on automatic sprinklers.
The Type D4a Nozzles are effective in
covering exposed vertical, horizontal,
curved, and irregular shaped surfaces
in a cooling spray to prevent excessive
absorption of heat from an external
fire and possible structural damage or
spread of fire to the protected equip-
ment. In some applications, depending
on water design density requirements,
the Type D4a Nozzles may also be
used for fire control or extinguishment.
The Type D4a Nozzles are available in
a wide variety of orifice sizes and spray
angles (included angle of discharge) to
provide versatility in system design.
It is recommended that the end user
be consulted with respect to the suit-
ability of the materials of construction
and finish for any given corrosive en-
vironment. The effects of ambient tem-
perature, concentration of chemicals,
and gas/chemical velocity, should
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 sprinkler to fail
to operate in a fire situation or cause
it to operate prematurely.
Page 1 of 6
be considered, at a minimum, along
with the corrosive nature to which the
sprinklers may be exposed.
The Type D4a PROTECTOSPRAY
Nozzle is a re-designation for the
Gem Type D4a Nozzle.
NOTICE
The TYCO Type D4a PROTECTO-
SPRAY Nozzles described
must be installed and maintained in
compliance with this document and
with the applicable standards of the
National Fire Protection Association,
in addition to the standards of any au-
thorities having jurisdiction. Failure to
do so may impair the performance of
these devices.
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 varia-
tions, as well as the wide range of
available nozzle spray characteristics,
the design of water spray fixed systems
for fire protection must only be per-
formed by experienced designers who
thoroughly understand the limitations
as well as capabilities of such systems.
The owner is responsible for maintain-
ing their fire protection system and
devices in proper operating condition.
The installing contractor or sprinkler
manufacturer should be contacted
with any questions.
Technical
Data
Approvals
UL and C-UL Listed
The TYCO Type D4a PROTECTO-
SPRAY Nozzles meet the requirements
of MIL-S-901C for lightweight Grade A
shock proof equipment.
The bronze Type D4a PROTECTO-
SPRAY Nozzles with a natural finish
and with 80 to 160 degree spray an-
gles meet the requirements of MIL-H-
19387A, Type I.
MARCH 2014
Worldwide
www.tyco-fire.com
Contacts
herein
Maximum Working Pressure
175 psi (12,1 bar)
Also refer to Figure 2, Note 2
Discharge Coefficient
Refer to Table A
Spray Angles
Refer to Table B
Material and Finish
Refer to Table E
Thread Connection
1/2 inch NPT
Physical Characteristics
(Bronze)
Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bronze
Deflector. . . . . . . . . . . . . . . . . . . . . . . . . . Bronze
Splitter . . . . . . . . . . . . . . . . . . . . . . . . . . . Bronze
Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bronze
TFP806