Nozzle Controls; Flow Control; Lever Type Flow Control; Twist Shuttoff - Task Force Tips MID-FORCE Instructions For Safe Operation And Maintenance

4.0 NOZZLE CONTROLS

4.1 FLOW CONTROL

4.1.1 LEVER TYPE FLOW CONTROL

On models that use a lever type valve handle, the nozzle is shut off when the handle is fully forward. The valve handle has six detent
fl ow positions. These detent positions allow the nozzle operator to regulate the fl ow of the nozzle depending on the need or what can
be safely and effectively 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 effective use and ease of advancement, while minimizing strain and fatigue.

4.1.2 TWIST SHUTTOFF

On models that use a twist fl ow control, the valve is opened or closed by rotating the valve ring. Rotating the ring clockwise (as seen
from the operating position behind the nozzle) closes the valve, while counterclockwise rotation opens it. Detents are provided at four
intermediate positions and the position of the valve is shown by the exposed valve position label.

4.1.3 TIP ONLY NOZZLES

Tip only nozzles have NO shut off valve contained within the nozzle and MUST be used with a separate ball valve attached to the
nozzle.

4.2 PATTERN AND FLUSH CONTROL

4.2.1 PATTERN CONTROL

TFT's ULTIMATIC, MID-MATIC and HANDLINE 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.
4.2.2 FLUSH CONTROL MID-FORCE and DUAL-FORCE MODELS
Small debris passes through the gasket grabber and may get caught inside the nozzle. This trapped material will cause poor stream
quality, shortened reach and reduced fl ow. To remove this trapped debris the nozzle can be fl ushed as follows; while still fl owing
water, turn the SHAPER counterclockwise past the full fog position (increased resistance will be felt on the SHAPER as the nozzle
goes into fl ush). This will open the nozzle allowing debris to pass through. Rotate the SHAPER clockwise and out of fl ush to continue
normal operation. During fl ush 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 fl ush position to retain control of
the nozzle.
Large amounts of debris can reduce the fl ow of the nozzle resulting in an ineffective fl ow. In the
WARNING
event of a blockage it may be necessary to retreat to a safe area, uncouple nozzle and remove
debris.
©Copyright Task Force Tips, Inc. 2002 - 2011
FIGURE 3 - GASKET GRABBER
8
LIN-035 March 28, 2011 Rev14