N-100-03_9 – Cla-Val 100-03 User Manual
Page 5
K =
894d
4
C
2
v
L =
K
12 f
K Factor (Resistance Coefficient)
The Value of K is calculated from the formula:
(U.S. system units)
Equivalent Length of Pipe
Equivalent lengths of pipe (L) are determined from the formula:
(U.S. system units)
Fluid Velocity
Fluid velocity can be calculated from the following formula:
(U.S. system units)
d
V =
.4085 Q
2
d
C
V
Factor
Formulas for computing C Factor, Flow (Q) and Pressure Drop
V
( P):
C
V
=
Q
P
C
V
=
Q
P
C
V
=
Q
P
2
V
Where:
U.S. (gpm) @ 1 psi differential at 60 F water
(l/s) @ 1 bar (14.5 PSIG) differential
or
at 15 C water
inside pipe diameter of Schedule 40 Steel Pipe (inches)
friction factor for clean, new Schedule 40 pipe
(dimensionless) (from Cameron Hydraulic Data,
18th Edition, P 3-119)
Resistance Coefficient (calculated)
Equivalent Length of Pipe (feet)
Flow Rate in U.S. (gpm) or (l/s)
Fluid Velocity (feet per second) or (meters per second)
Pressure Drop in (psi) or (bar)
=
=
=
=
=
=
=
=
=
P
V
Q
L
K
f
d
C
8
10
4
6
10
20
30 40
60 80 100
200
500
1000
2000
5000
10,000 20,000 50,000
1
2
3
4
6
8
10
20
30
40
60
80
100
5
3
Angle Valve Sizes (Inches)
Globe Valve Sizes (Inches)
3
4
6
8
10
12
12
2
1/2
3
14
16
16
2
1/2
Pressure Drop —
psi
14
Flow Rate gpm (water)
Model 100-03 Flow Chart
(Based on normal flow through a wide open valve)
Functional Data
Model 100-03
*Estimated
Valve Size
Inches
2
1
⁄
2
3
4
6
8
10
12
14
16
mm.
65
80
100
150
200
250
300
350
400
C
V
Factor
Globe
Pattern
Gal./Min. (gpm.)
85
115
200
440
770
1245
1725
2300
2940
Litres/Sec. (l/s.)
20
28
48
106
185
299
414
552
706
Angle
Pattern
Gal./Min. (gpm.)
101
139
240
541
990
1575
2500*
3060*
4200*
Litres/Sec. (l/s.)
24
33
58
130
238
378
600
734
1008
Equivalent
Length
of
Pipe
Globe
Pattern
Feet (ft.)
53
85
116
211
291
347
467
422
503
Meters (m.)
16
26
35
64
89
106
142
129
154
Angle
Pattern
Feet (ft.)
37
58
80
139
176
217
222*
238*
247*
Meters (m.)
12
18
25
43
54
66
68
73
75
K
Factor
Globe Pattern
4.6
6.0
5.9
6.2
6.1
5.8
6.1
5.0
5.2
Angle Pattern
3.3
4.1
4.1
4.1
3.7
3.6
2.9
2.8
2.6
Liquid Displaced from
Cover Chamber When
Valve Opens
Fl. Oz
—
—
—
—
—
—
—
—
—
U.S. Gal.
.04
.08
.17
.53
1.26
2.51
4.0
6.5
9.6
ml
163
303
643
—
—
—
—
—
—
Litres
—
—
—
2.0
4.8
9.5
15.1
24.6
36.2