BERMAD Fire Protection
400 Series
FP 400E Flow & Hydraulic Data
5
678
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
Pressure 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 Gf
∆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
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