Quarter Turn Valve; Flow Characteristics; Hemisphere Pressure Loss; Automatic, Fixed, And Selectable Flow Nozzles - Task Force Tips HEMISPHERE Instructions For Installation, Operation And Maintenance

5.5.4 QUARTER TURN VALVE

WARNING
The quarter turn valve incorporates a bail style handle to allow opening/closing from either side. The valve locks in the off position to
prevent accidental opening. The valve also includes an internal mechanism that prevents the force of the water from influencing the
valve position. See LIA-355 2.5" Quarter Turn Hydrant Valve Manual for more information.

6.0 FLOW CHARACTERISTICS

The Hemisphere Transportable Monitor is designed for maximum flows of 500 gpm (2000 l/min) and a maximum pressure at the
nozzle, while flowing, of 175 psi (12 bar). Do not exceed these limits.
DANGER

6.1 HEMISPHERE PRESSURE LOSS

6.2 AUTOMATIC, FIXED, AND SELECTABLE FLOW NOZZLES

A variety of water or foam nozzles may be used with the Hemisphere. Automatic nozzles maintain a constant pressure by adjusting
their opening to match the available flow. Consult the nozzle manufacturer for maximum flow and pressure ratings. In all cases do
not exceed 500 gpm (2000 l/min) and/or 175 psi (12 bar) nozzle exit pressure.

6.3 STACKED TIPS AND SMOOTH BORE NOZZLES

NOZZLE
DIAMETER
FLOW
(GPM)
1.0 INCH
1-1/4 INCH
1-1/2 INCH
NOZZLE
DIAMETER
FLOW
(L/min)
25 MM
32 MM 1300
38 MM 1900
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Sudden changes in valve position can cause pressure spikes (water hammer) and could lead to
hose failure or an out of control monitor. Open and close the valve slowly to avoid water hammer.
An inadequate supply of pressure and/or flow will cause an ineffective stream and can result
in injury or death. Choose operating conditions to deliver adequate fire suppression. See flow
graphs.
0 400
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
0 100
Pressure Loss for the Hemisphere Monitor
50 PSI 80 PSI
REACTION FLOW REACTION
(LBS) (GPM)
210 80 266
328 120 415
473 177 —
4 BAR 6 BAR
REACTION FLOW REACTION
(KG) (L/min)
830 40 1000
70 1700
90 —
FLOW EXCEEDS RATING OF HEMISPHERE TRANSPORTABLE MONITOR
FLOW (LPM)
800 1200 1600
200 300 400
FLOW (GPM)
Figure 6.1
NOZZLE EXIT PRESSURE
100 PSI
FLOW REACTION
(LBS) (GPM) (LBS)
126 297 157
196 464 245
— — —
NOZZLE EXIT PRESSURE
8 BAR
FLOW REACTION
(KG) (L/min) (KG)
60 1200 80
100 1900 130
— — —
24
2000
2.5
2
1.5
1
0.5
0
500
150 PSI 175 PSI
FLOW REACTION FLOW REACTION
(GPM) (LBS) (GPM)
364 236 390
— — —
— — —
10 BAR 12 BAR
FLOW REACTION FLOW REACTION
(L/min) (KG) (L/min)
1300 100 1400
— — —
— — —
(LBS)
275
—
—
(KG)
120
—
—
LIX-740 July 21, 2020 Rev08