Type AM4
AQUAMIST Nozzle
Non-Automatic (Open)
Page 1 of 2
AUGUST 2018
TFP2204
IMPORTANT
Refer to Technical Data Sheet
TFP2300 for warnings pertaining to
regulatory and health information.
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
installation 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.
Worldwide
Contacts
www.tyco-fire.com
General
Description
The TYCO Type AM4 AQUAMIST
Nozzle is a stainless steel, open (non-
automatic) nozzle intended for use with
total compartment, engineered, water
mist deluge systems. It is an interme-
diate pressure nozzle which utilizes a
single fluid jet impinging on a diffuser
to produce a spray having a range of
water droplet sizes suitable for the
extinguishment of Class B fires, as well
as incidental Class A fires.
It is recommended that the end user be
consulted with respect to the suitabil-
ity of the materials of construction and
finish for any given corrosive environ-
ment. The effects of ambient tempera-
ture, concentration of chemicals, and
gas/chemical velocity, should be con-
sidered, at a minimum, along with the
corrosive nature to which the nozzles
may be exposed.
NOTICE
The TYCO Type AM4 AQUAMIST
Nozzles described herein must be
installed and maintained in compliance
with this document, as well as with the
applicable standards of the NATIONAL
FIRE PROTECTION ASSOCIATION
(NFPA), in addition to the standards of
any other authorities having jurisdiction.
Failure to do so may impair the perfor-
mance of these devices.
The design of individual watermist
systems can vary considerably,
depending on the characteristics and
nature of the hazard and the basic
purpose of the watermist system.
Because of these variations, the design
of watermist systems for fire protec-
tion must only be performed by expe-
rienced designers who thoroughly
understand the limitations as well as
capabilities of such systems.
The owner is responsible for main-
taining their fire protection system
and devices in proper operating con-
dition. Contact the installing contrac-
tor or product manufacturer with any
questions.
Technical
Data
Minimum Working Pressure
See specific application data sheet
Maximum Working Pressure
250 psi (17,2 bar)
Discharge Coefficient
K = 0.24 GPM/psi
1/2
(K = 3,5 LPM/bar
1/2
)
Thread Connection
1/2 inch NPT
Physical Characteristics
Frame . . . . . . . . . . . . . . . . . . . . . Stainless Steel
Strainer . . . . . . . . . . . . . . . . . . . . Stainless Steel
Orifice Insert . . . . . . . . . . . . . . . . Stainless Steel
Diffuser . . . . . . . . . . . . . . . . . . . . Stainless Steel
Dust Cap . . . . . . . . . . . Buna-N or Fluorosilicone
The smallest waterway (orifice) diameter of
the Orifice Insert is nominally 0.091 inches
(2,31 mm), and the diameter of the Inlet
Strainer perforations are nominally 0.060
inches (1,52 mm).
Design
Criteria
Obtain guidance for the design of a
watermist system that utilizes the TYCO
Type AM4 AQUAMIST Nozzle from the
Technical Services Department.
Installation
The TYCO Type AM4 AQUAMIST
Nozzle must be installed in accordance
with this section:
General Instructions
A leak tight 1/2 inch NPT nozzle joint
should be obtained with a torque of
7 to 14 ft-lbs (9,5 to 19,0 Nm). Higher
levels of torque may distort the nozzle
inlet and cause leakage or impairment
of the nozzle.
Step 1.
With pipe thread sealant
applied to the pipe threads, hand
tighten the nozzle into the nozzle fitting.
Step 2.
Tighten the nozzle into the
nozzle fitting using only the W-Type 6
Sprinkler Wrench (Ref. Figure 2). With
reference to Figure 1, the W-Type 6
Sprinkler Wrench is to be applied to
the wrenching area.
