BERMAD
Fire Protection
400 Series
FP 400E Flow
&
Hydraulic Data
5
6 7 8
10
15
20
30
4
40
0
50
60 80
100
150
200
20
300
0300
500
600800
1000
2000
0.01
0.05
0.1
0.5
1.0
2
1
/
2
"
3"
4"
6"
8"
10"
12"
bar
m
3
/h
psi
1.5
2.5
5.0
7.5
10.0
12.5
15.0
0.15
0.25
0.5
0.75
1.0
1.25
20 30 40 50 75 100
500 1,000
5,000
gpm
Pr
essu
re
Loss
1
1
/
2
"
14"
2"
Flow Chart
Flow Properties
DN
40
50
65
80
100
150
200
250
300
350
Inch
1½"
2"
2½"
3"
4"
6"
8"
10"
12"
14"
Kv
57
57
78
136
204
458
781
829 1,932 1,932
Cv
66
66
90
157
236
529
902
957 2,231 2,231
K
3.2
3.2
4.2
2.9
4.0
4.0
4.4
3.9
3.6
3.6
Leq-m
9.1
9.1
12.1
13.7
14
27.4
45.8
108
57
57
Leq-feet
30
30
40
45
46
90
150
354
187
187
Valve flow coefficient, Kv or Cv
Equivalent Pipe Length, Leq
Flow resistance or Head loss coefficient,
Cv = 1.155 Kv
Where:
Kv = Valve flow coefficient (flow in m
3
/h at 1bar Diff. Press.)
Cv = Valve flow coefficient (flow in gpm at 1psi Diff. Press.)
Q = Flow rate (m
3
/h ; gpm)
∆
P = Differential pressure (bar ; psi)
Gf = Liquid specific gravity (Water = 1.0)
Kv(Cv)=Q G
f
∆
P
Leq=Lk.D
K=
∆
H 2g
V
2
Where:
K = Flow resistance or Head loss coefficient (dimensionless)
∆
H = Head loss (m ; feet)
V = Nominal size flow velocity (m/sec ; feet/sec.)
g = Acceleration of gravity (9.81 m/sec
2
; 32.18 feet/sec
2
)
Where:
Leq = Equivalent nominal pipe length (m ; feet)
Lk = Equivalent length coefficient for turbulent
flow in clean commercial steel pipe (SCH 40)
D = Nominal pipe diameter (m; feet)
Note:
The Leq values given are for general consideration only.
Actual Leq may vary somewhat with each of the valve sizes.
3
