©Copyright Task Force Tips LLC 2020
7
LIN-070 September 29, 2020 Rev01
5.0 NOZZLE CONTROLS
5.1 FLOW CONTROL
5.1.1 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.
5.1.2 TIP ONLY NOZZLES
Tip only nozzles have NO shut-off valve within the nozzle and MUST be used with a separate ball valve attached to the nozzle. Using a
nozzle without a shutoff is an unsafe practice and should never be done.
5.2 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. 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.
5.3 FLUSH CONTROL
Small debris may get caught inside the nozzle. This trapped material will cause poor stream quality, shortened reach, and reduced flow.
To remove small debris, the nozzle may be flushed as follows:
• While still flowing water, rotate the shaper counterclockwise (as viewed from behind the nozzle) to the Flush setting. This will open
the nozzle allowing debris to pass through.
• 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.
• Rotate the shaper out of flush to continue normal operations.
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.
