Functional data – Cla-Val 60-73/660-73 Technical Manual User Manual
Page 15
Model 100-31
Model 100-31
Flow Chart
(Based on normal flow through a wide open valve)
Functional Data
Application Note
The distinctive smooth flow path of the 600
series Powercheck valve is engineered to
overcome cavitation problems. It's unique
design is highly resistant to cavitation damage
under severe pressure drops. Tests have
proven it to be effective in preventing valve
body and seat pitting.
We also offer a free computerized cavitation
analysis. This analysis provides cavitation
damage information for actual conditions
provided by the customer. If there is an appli-
cation where the potential for cavitation exists,
the 600 series Powercheck valve provides
substantial resistance to this problem.
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
Valve Size
Inches
4
6
8
10
mm.
100
150
200
250
C
V
Factor
Globe
Pattern
Gal./Min. (gpm.)
136
229
480
930
Litres/Sec. (l/s.)
32.5
55
115
223
Angle
Pattern
Gal./Min. (gpm.)
135
233
545
—
Litres/Sec. (l/s.)
32
56
132
—
Equivalent
Length
of
Pipe
Globe
Pattern
Feet (ft.)
251
777
748
621
Meters (m.)
76.4
237.1
228.1
189.5
Angle
Pattern
Feet (ft.)
254
751
580
—
Meters (m.)
77.6
229
176.9
—
K
Factor
Globe Pattern
12.7
23.1
15.7
10.4
Angle Pattern
12.9
22.3
12.2
—
Liquid Displaced from
Cover Chamber When
Valve Opens
Fl. Oz
—
—
—
—
U.S. Gal.
.08
.17
.53
1.26
ml
—
—
—
—
Litres
.30
.64
2.0
4.8