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Step 2: Find piping pressure loss constant.
Using the results from step 1 use the following equation to calculate the pressure
loss constant between the in-line pressure gauge and the nozzle.
Where:
C
is pressure loss constant in GPM /PSI (or LPM /BAR)
piping
P
is inline pressure gauge reading in PSI (or BAR)
inline
Step 3: Calculate nozzle constant.
Where:
C
is the nozzle's constant in GPM /PSI (or LPM /BAR)
nozzle
Q
is the nozzle's nominal flow in GPM (or LPM)
nominal
P
is the nozzle's nominal pressure in PSI (or BAR)
nominal
Step 4: Calculate flow.
Using the pressure loss constant from step 2, the nozzle
constant from step 3, and the in-line pressure gauge reading,
the flow with a fixed orifice nozzle can be calculated with the
following equation.
Where:
Q
is fixed orifice nozzle's flow in GPM (or LPM)
Mount a graph or table of the results adjacent to the in-line pressure gauge. Deliver any desired flow by adjustment of pump pressure.
3.4 STREAM TRAJECTORY DATA
Figure 5 gives the stream trajectory for the Industrial and Masterstream nozzles at various pressures. The graphs represent orifice
sizes of 250, 350, 500, 750 and 1000 GPM at 100 PSI. For other orifice sizes and pressures the graphs may be interpolated.
Notes on trajectory graphs:
!
Graphs show approximate effective stream trajectory at 30 degrees elevation in no wind conditions. Distance to
last water drops approximately 10% farther.
!
Trajectories shown are for water. The addition of foam is expected to decrease the reach by approximately 10%.
!
Tail or head winds of 20 MPH (30 KPH) may increase or decrease the range approximately 30%.
0
10
20
80
70
INDUSTRIAL AND MASTERSTREAM 1000, 75 PSI (5 BAR, 500 KPA )
60
50
40
30
20
A
10
0
0
20
40
60
0
10
20
80
70
INDUSTRIAL AND MASTERSTREAM 1000, 100 PSI (7 BAR, 700 KPA )
60
50
40
30
20
10
0
0
20
40
60
©Copyright Task Force Tips, Inc. 1998-2004
2
2
HORIZONTAL DISTANCE (METERS)
30
40
50
B
C
80
100
120
140
160
HORIZONTAL DISTANCE (FEET)
HORIZONTAL DISTANCE (METERS)
30
40
50
A
B
80
100
120
140
160
HORIZONTAL DISTANCE (FEET)
2
2
Q =
60
70
80
D
E
180
200
220
240
260
60
70
80
D
E
C
180
200
220
240
260
7
2
Q
C
=
piping
P
in-line
Q
C
=
nozzle
P
C
x C
piping
nozzle
(C
+ C
piping
CURVE
FLOW
90
A
B
C
20
D
E
10
CURVE
FLOW
A
B
0
C
280
300
D
E
CURVE
FLOW
90
A
B
C
20
D
E
10
FLOW
CURVE
A
B
0
C
280
300
D
E
LIM-035 October 5, 2004 Rev02
smooth
— P
pitot
2
nominal
nominal
x P
inline
)
nozzle
GPM
LBS
REACTION
200
100
300
140
430
200
650
300
870
400
LPM
KGF
REACTION
830
45
1100
60
1600
90
2500
140
3300
180
GPM
LBS
REACTION
250
130
350
190
500
270
750
400
1000
530
LPM
KGF
REACTION
950
60
1300
80
1900
120
2800
180
3800
240
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