MAC/MTT-OPS-1
26 FEB 2019
SECTION 2
System Description
2-21
In-Line Stream Shaper
A performance enhancer that
is mounted between the
water cannon outlet and the
selected straight bore nozzle.
The stream shaper pathway is
a honeycomb style channel
designed to efficiently shape
a water stream to maximum
water stream distance.
Manual Adjustable Nozzle
FOG/STREAM: A modified straight bore nozzle that
allows the operator to manually adjust selected
water stream patterns from fog to stream. Some
nozzles are configured for fire suppression foam
eduction.
F
AN/STREAM: A modified straight bore nozzle that
allows the operator to manually adjust selected
water stream patterns from flat fan to stream. The
flat fan pattern orientation is adjustable from
horizontal to vertical by reorienting the nozzle on
the water cannon.
Remote Adjustable Nozzle (Electric/Hydraulic)
A modified straight bore nozzle that allows the
operator to remotely adjust selected water stream
patterns from fog to stream from the cab control.
The nozzle inner or outer barrel is moved by an
electric or hydraulic actuator to obtain the fog or
stream pattern. Some nozzles are configured for
fire suppression foam eduction.
Fan/Stream
A modified straight bore nozzle that allows the
operator to remotely adjust selected water stream
patters from flat fan to stream from the cab
control. The nozzle inner or outer barrel is moved
by an electric actuator to obtain the fan or stream
pattern. The flat fan pattern orientation is
adjustable from horizontal to vertical by
reorienting the nozzle on the monitor.
SPRAY SYSTEM
The spray head system consists of 4, 6 or 8
hydraulic or pneumatic actuated spray heads, cab
controls, solenoid control box assembly and
hydraulic or pneumatic hosing.
Pneumatic Spray Head
A two piece aluminum valve
body and adjustable ring
mounted to a water supply
header pipe. The upper portion
of the valve body is an air
chamber with a diaphragm and
guide disk assembly attached to the bottom. The
air chamber receives pressurized air from the
solenoid control box as commanded by the cab
control switch. When the upper portion of the
valve body is pressurized the guide disk will seal
the opening on the lower portion of the valve and
stop water flow.
When the cab control system is OFF and the water
pump is OFF the air chamber incorporates a spring
that will apply pressure to the guide disk assembly
and seal the opening on the lower portion of the
valve and stop flow. When air pressure is removed
from the upper portion of the valve body when
the water pump is ON and the cab control switch
ON, pressurized water from the header pipe will
unseat the guide disk and water will flow from the
lower portion of valve.
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