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3.2 FLOW CHARACTERISTICS OF MASTERSTREAM 1000 FIXED NOZZLE
The Masterstream 1000 Fixed Flow Nozzle is set to the desired flow by adjusting the baffle and locking it in place with a jam nut. The
nozzle is adjusted and flow tested at the factory at time of order. If the baffle is moved (for example to flush the nozzle), then the baffle
must be readjusted to obtain the desired flow. Refer to figure 3.0 for baffle position to achieve a certain flow and pressure. Figure 4 gives
relationship of flow and pressure for various orifice sizes.
1000
180
160
140
120
100
80
60
40
200
300
FIG 4 - Nozzle flow vs. baffle turns from closed position for Masterstream Fixed Nozzle
WARNING
3.3 DETERMINING FLOW WITH PRE-PIPED MONITORS
The simplest procedure to determine flow is with a flow meter. If a flow meter is unavailable then the flow may be estimated using
pressure loss data between the nozzle and an in-line pressure gauge at the pump or considerably upstream from the nozzle. Data is
taken with a smooth bore nozzle and handheld pitot gauge. Note: equations assume no substantial change in elevation between in-
line pressure gauge and nozzle.
Step1: Determine flow of smooth bore nozzle.
Flow water with a smooth bore nozzle and record the nozzle's size, pitot pressure and in-line pressure gauge reading. The smooth
bore nozzle's flow is calculated from the Freeman formula:
Q
= F x D
nozzle
Where:
F =29.71 for English units (GPM, INCHES, PSI)
F=.667 for metric units (LPM, MM, BAR) Note: 1 BAR=100 KPA
Q
is smooth bore nozzle flow in GPM (or LPM)
nozzle
D
is nozzle exit diameter in INCHES (or MM)
P
is pitot pressure in PSI (or BAR)
pitot
©Copyright Task Force Tips, Inc. 1998-2004
NOZZLE FLOW (LPM)
2000
2 turns
3 turns
400
500
600
NOZZLE FLOW (GPM)
An inadequate supply of nozzle pressure and/or flow will cause an ineffective stream and can result
in injury, death or loss of property.
2
P
pitot
3000
4 turns
5 turns
700
800
900 1000 1100 1200 1300 1400
6
4000
5000
6 turns
7 turns
LIM-035 October 5, 2004 Rev02
12
10
8
6
4
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