©Copyright Task Force Tips LLC 2002-2020
8
LKB-100 September 17, 2020 Rev12
6.0 NOZZLE CONTROLS
6.1 FLOW CONTROL
6.1.1 LEVER TYPE FLOW CONTROL (BALL VALVE)
Models with a ball valve are shut off when the valve handle is fully forward. Pulling back on the handle opens the valve. TFT
recommends the use of a pistol grip for easier handling. For additional stress reduction, a hose rope or strap may also be used. This
permits more effective use and ease of advancement, while minimizing strain and fatigue.
6.1.2 TIP ONLY NOZZLES
Twister and Bubble Cup Tip Only nozzles have a twist shut off valve contained within the nozzle.
6.2 PATTERN CONTROL
TFT 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, and the eventually to OFF. Turning the shaper
counterclockwise will result in an increasingly wider pattern.
Since the stream trim point varies with flow, the stream should be “trimmed” after changing the flow to obtain the straightest and farthest
reaching stream. To properly trim the stream, first open the pattern to narrow fog. Then close the stream to parallel to give maximum
reach. Turning the shaper further forward will cause stream crossover and reduce the effective reach of the nozzle.
6.3 BUBBLE CUP NOZZLES
The Bubble Cup nozzle is capable of producing aspirated foam as well as conventional straight stream and wide protective fog patterns.
The Bubble Cup functions just like the Twister nozzle when the aspirating sleeve is in the retracted position.
To use the aspirating feature of the Bubble Cup, slide the aspirating sleeve portion of the nozzle forward. Rotation of the shaper while
the sleeve is extended provides 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.
Figure 6.3
NOTICE
Control valves must be opened slowly to eliminate unnecessary strain on the hose and couplings,
and reduce pressure surges.
NOTICE
Nozzles attached to an in-service hose shall be stored in the off position.
NOTICE
In partially open positions, a ball valve will cause turbulence and adversely affect stream quality.
WARNING
The nozzle reaction is greatest when the shaper is in the straight stream position. Sudden changes
in pattern can cause changes in reaction, leading to loss of footing or an out of control nozzle. The
nozzle operator must be prepared for a change in reaction as the pattern is changed.
CAUTION
Dents or nicks in the nozzle tip can seriously affect the stream reach or pattern, which may increase
the risk of injury due to exposure. Care must be taken to avoid dents or nicks in the nozzle tip.
WARNING
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 the nozzle and remove debris.
2
95
09
5BC
GPM
FS
/20
2
95
09
5BC
GPM
FS
/20
EXTENDED TO
WHITE LINE
ASPIRATING
SLEEVE
SHAPER
Retracted Position
Extended Position
