6
4.1.3 TIP ONLY NOZZLES
Tip only nozzles have NO shut off valve contained
within the nozzle and
be used with a
separate ball valve attached to the nozzle.
MUST
Models with a ball valve are shut off when the valve
handle is fully forward. Pulling back on the handle opens
the valve. Open valve slowly to avoid sudden changes in
nozzle reaction. Close valve slowly to prevent water
hammer. Note: In partially open positions a ball valve will
cause turbulence and adversely affect stream quality.
4.2 BALL VALVE SHUTOFF
ON
FL
OW
CONTR
O
L
OFF
ON
FL
OW
CONTR
O
L
OFF
Metro
1
Metro
2
4.3 PATTERN CONTROL
TFT's Metro has full pattern control from straight stream to wide fog. Turning the STREAM
SHAPER clockwise (as seen from the operating position behind the nozzle) moves the
SHAPER to the straight stream position. Turning the SHAPER counterclockwise will result in
an increasingly wider pattern.
Since the stream trim point varies with the flow, the stream should be "trimmed" after changing the flow to obtain the straightest and
farthest reaching stream. To properly trim a stream, first open the pattern to a narrow fog. Then close the stream to parallel to give
maximum reach.
The nozzle reaction is greatest when the shaper is in the straight stream position. The nozzle operator must be prepared for a change in
reaction as the pattern is changed.
NOTE: Turning the shaper further forward will cause stream crossover and reduce the effective reach of the
nozzle.
Small debris may get caught inside the nozzle. This trapped material will cause poor stream quality, shortened reach and reduced flow.
To remove this trapped debris the nozzle can be flushed as follows; while still flowing water, turn the SHAPER counterclockwise past
the full fog position (increased resistance will be felt on the SHAPER as the nozzle goes into flush). This will open the nozzle allowing
debris to pass through. Rotate the SHAPER clockwise and out of flush to continue normal operation. During flush the nozzle reaction
will decrease as the pattern becomes wider and the pressure drops. The nozzle operator must be prepared for an increase of nozzle
reaction when returning the nozzle from the flush position to retain control of the nozzle.
4.4 FLUSH CONTROL
Large amounts or pieces of debris may be unflushable and can reduce the flow of the nozzle
resulting in an ineffective flow. In the event of a blockage, it may be necessary to retreat to a
safe area, uncouple nozzle and remove debris.
WARNING
4.5 USE WITH FOAM
The Metro nozzles may be used with foam solutions. Refer to fire service training for the proper use of foam.
For Class B fires, lack of foam or interruption in the foam stream can cause a break in the foam
blanket and greatly increase the risk of injury or death. Assure that: Application rate is sufficient
(see NFPA 11 or foam manufacturer's recommendations);
Enough concentrate is on hand to
complete task (see NFPA for minimum duration time requirements); Foam logistics have been
carefully planned. Allow for such things as: Storage of foam in a location not exposed to the hazard
it protects; Personnel, equipment and technique to deliver foam at a rapid enough rate; Removal
of empty foam containers; Clear path to deliver foam, as hoses and other equipment and vehicles
are deployed.
WARNING
Improper use of foam can result in injury or damage to the environment. Follow foam
manufacturer's instructions and fire service training to avoid: Using wrong type of foam on a fire,
i.e. Class A foam on a Class B fire; Plunging foam into pools of burning liquid fuels; Causing
environmental damage; Directing stream at personnel.
There is a wide variety of foam concentrates. Each user is responsible for verifying that any foam
concentrate chosen to be used with this unit has been tested to assure that the foam obtained is
suitable for the purpose intended.
WARNING
WARNING
©Copyright Task Force Tips, Inc. 2002-2008
LIN-040 October 28, 2008 Rev 05
