Instruction Manual

For assistance in selecting appropriate valve options or valves manufactured with special design requirements, please contact our Regional Sales Office or Factory.
Model 100-20KO
Functional Data
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
Notes: On Operating Differential
*The 100-20KO Series is the reduced inter-
nal port size version of the 100-01KO Series.
1. For atmospheric discharge, the
maximum inlet pressure cannot
exceed 150 psi.
2. For pressure differentials greater
than 300 psi the maximum flow
velocity should not exceed 18 ft/sec.
3. Flow velocities greater than 25 ft/sec
are not recommended.
4. Recommended minimum flow velocity
is 1 ft/sec.
5. Consult factory for conditions
exceeding these recommendations.
100G-20KO ANTI-CAVITATION VALVE CURVES
100
10
1000
10000
FLOW RATE (gpm)
10
100
PRESSURE DROP (psi)
400
1
300
SOLID LINE IS FULL OPEN FLOW CURVES AT 18 FT/SEC FOR CONTINUOUS DUTY APPLICATIONS
DASHED LINE IS FULL OPEN FLOW CURVE AT 25 FT/SEC FOR INTERMITTENT DUTY APPLICATIONS
4"
6"
8"
10"
12"
14"
3"
30"
16"
24"
18"
20"
36"
SELECTION GUIDELINE FOR KO ANTI-CAVITATION VALVES
400
350
300
200
150
100
50
0
010
20 30
40 60
50
70 80
OUTLET PRESSURE (psi)
250
INLET PRESSURE (psi)
Cavitation
Zone
90 100
COVER
PIPE PLUG
COVER BEARING
SPRING
STEM NUT
DIAPHRAGM WASHER
DISC RETAINER
BODY
* SPACER WASHERS
PIPE PLUG
SEAT O-RING
STUD
10" and Larger
* DIAPHRAGM
* DISC
* Repair Parts
PIPE PLUG
HEX NUT
10" and Larger
KO
DISC GUIDE
STEM
(Globe
Shown)
KO
SEAT
Seat Screw
10" and Larger
Cover Bolt
6" and Smaller
*
*
Valve Size
Inches
3 4 6 8 10 12 14 16 18 20 24 30 36
mm.
80 100 150 200 250 300 350 400 450 500 600 760 900
C
V
Factor
Globe
Pattern
Gal./Min. (gpm.)
25 46 98 240 409 660 910 925 1175 1225 1271 3900 6200
Litres/Sec. (l/s.)
6.0 11.0 23.5 57.7 98 159 219 222 342 348 358 708 1490
Angle
Pattern
Gal./Min. (gpm.)
— 49 105 230 CF** CF** CF** CF** CF** 1200 CF** — —
Litres/Sec. (l/s.)
— 11.8 25.2 55 CF** CF** CF** CF** CF** 288 CF** — —
Equivalent
Length
of Pipe
Globe
Pattern
Feet (ft.)
1800 2191 4244 3404 3884 3190 3359 6472 6155 9752 22789 8373 8611
Meters (m.)
549 668 1294 1038 1184 972 1024 1973 1876 2973 6946 2552 2625
Angle
Pattern
Feet (ft.)
— 1931 3697 3257 CF** CF** CF** CF** CF** CF** CF** — —
Meters (m.)
— 589 1127 993 CF** CF** CF** CF** CF** CF** CF** — —
K
Factor
Globe Pattern
127 111 126 72 65 42 40 67 53 75 145 39 33
Angle Pattern
— 98 110 69 — — — — — — — — —
Liquid Displaced from Cover
Chamber When Valve
Opens
U.S. Gal. .03 .08 .17 .53 1.26 2.5 4.0 4.0 9.6 9.6 9.6 29.0 42.0
Litres .12 .30 .64 2.0 4.8 9.5 15.1 15.1 36.2 36.2 36.2 110 159