©Copyright Task Force Tips LLC 2002 - 2018
LKB-100 August 2, 2018 Rev11
7
6.0 NOZZLE CONTROLS
Nozzle control valves must be opened slowly to eliminate unnecessary strain on the hose and couplings and reduce pressure surges.
6.1 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. Close valve slowly to prevent water hammer.
The ball valve allows the nozzle operator to regulate the fl ow of the nozzle depending on the need or what can be safely and
eff ectively handled. 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 eff ective use and ease of advancement, while minimizing strain and fatigue. Note: In partially
open positions a ball valve will cause turbulence and adversely aff ect stream quality. Nozzles attached to an in-service hose shall
be stored in the off position.
6.2 TIP ONLY NOZZLES
Twister and BubbleCup Tip only nozzles have a twist shut off valve contained within the nozzle.
6.3 PATTERN AND FLUSH CONTROL
6.3.1 PATTERN CONTROL
The Twister and BubbleCup nozzles have full pattern control from straight stream to wide fog. Turning the 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 as well as the nozzle’s higher fl ow setting.
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
furthest reaching stream. The nozzle reaction is greatest when the shaper is in the straight-stream position.
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 eff ective reach of the nozzle.
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
6.3.2 FLUSH SETTING
WARNING
Large amounts or pieces of debris may be unfl ushable and can reduce the fl ow of the nozzle
resulting in an ineff ective fl ow. In the event of a blockage, it may be necessary to retreat to a safe
area, uncouple the nozzle and remove debris.
