©Copyright Task Force Tips, Inc. 2002 - 2015
LIN-035 June 16, 2015 Rev15
17
5.0 NOZZLE CONTROLS
Nozzle control valves must be opened slowly to eliminate unnecessary strain on the hose and couplings and reduce pressure surges.
5.1 FLOW CONTROL
5.1.1 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 detented
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.
Nozzles attached to an in-service hose shall be stored in the off
position.
5.1.2 TIP ONLY
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.
TASK FORCE
TIPS
5.1.3 BALL SHUT-OFF
A separate ball valve for use with Tip Only nozzles is 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. Note: In
partially open positions a ball valve will cause turbulence and
adversely affect stream quality. Nozzles attached to an in-service
hose shall be stored in the off position.
5.1.4 TWIST SHUT-OFF
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. Nozzles attached to
an in-service hose shall be stored in the off position.
5.1.5 IMPULSE TRIGGER HLOW CONTROL
NOTE: THE TRIGGER RETURNS TO OFF
IF NOT HELD OR LOCKED
OFF
ON
TRIGGER
LOCK
WARNING
Do not intentionally release the nozzle while fl owing and trust the valve to shut off automatically.
The trigger nozzle’s ability to shut off by itself represents an extra level of safety when following
normal nozzle handling procedures. To rely on it as the sole means of safety increases the risk
of injury from an out of control nozzle. Release nozzle when fl ow has stopped.
