©Copyright Task Force Tips, Inc. 2002 - 2010
LKB-100 January 18, 2009 Rev9
5
4.0 BUBBLECUP NOZZLES
The Bubble Cup nozzle is capable of producing aspirated foam as well as a conventional straight stream and wide protective fog
pattern. The Bubble Cup functions just like the Twister nozzle (see section 3.0) when the gray sleeve is in the retracted position as
in fi gure 3A.
To use the aspirating feature of the Bubble Cup, the nozzle operator need only slide the gray sleeve portion of the nozzle forward.
When the sleeve is in the fully-extended position, a white line on the shaper will be visible at the base of the gray sleeve as in
fi gure 3B. Rotation of the shaper when the sleeve is extended will provide the nozzle operator control of reach and aspiration. If an
immediate wide protective fog pattern is needed, the sleeve can be retracted instantly to its regular position.
2
95
09
5BC
GPM
FS
/
20
2
95
09
5BC
GPM
FS
/
20
EXTENDED TO
WHITE LINE
ASPIRATING
SLEEVE
SHAPER
A) Retracted Position
B) Extended Position
FIGURE 3 BUBBLE CUP OPERATING POSITIONS
3.1.2 BALL SHUTOFF
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. Note: In partially-open positions a ball valve will cause turbulence and adversely
affect stream quality. Close valve slowly to prevent water hammer.
3.2 PATTERN AND FLUSH CONTROL
3.2.1 PATTERN CONTROL
TFT’s Twister and BubbleCup Nozzles have 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 fl ow, the stream should be “trimmed” after changing the fl ow to obtain the straightest
and farthest reaching stream. To properly trim a stream, fi rst open the pattern to a narrow fog. Then close the stream to parallel to
give maximum reach. NOTE: Turning the shaper further forward will cause stream crossover and reduce the effective reach of the
nozzle.
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.
Low & High / Straight Stream
Low & High / Medium Fog
High /Wide Fog
FIGURE 2 CHANGING PATTERN AND FLOW SETTINGS
WARNING
Large amounts of debris can reduce the fl ow of the nozzle resulting in an ineffective fl ow. In the
event of a blockage it may be necessary to retreat to a safe area, uncouple nozzle and remove
debris.
