Watts S1127-8 - Manual (Page 2)

Flow Rate - Gallons per minute (Water)
Pressure Drop (p.s.i.)
Angle
Globe
2 4 6 8 10 20 40 60 80 100 200 500 1000 2000 5000 10000 20000
100,000
100
80
60
40
30
20
10
8
6
4
3
2
Maximum continuous flow based on velocity of 20 ft. per second.
Maximum intermittent flow based on velocity of 25 ft. per second.
The C
V
factor of a valve is the flow rate in US GPM at 60° F that will cause a 1 psi drop in pressure.
The factors stated are based upon a fully open valve.
C
V
factor can be used in the following equations to determine Flow (Q) and Pressure Drop ( r P):
Q (Flow) = C
V
r P rP (Pressure Drop) = (Q/C
V
) 2
Flow Data
Valve Size - Inches 6 8 10 12 16 18 20 24
Maximum Continuous
Flow Rate Gpm (Water)
800 1850 3100 5000 7000 11100 11100 11100
Maximum Intermittent
Flow Rate Gpm (Water)
1000 2300 4000 6250 8900 14100 14100 14100
C
V
Factor GPM (Globe) 224 489 932 1428 2067 2881 2881 2881
C
V
Factor GPM (Angle) 237 534
Estimated
Valve Cover
Valve Size (in) 6 8 10 12 16 18 20 24
fl.oz. 22 70
U.S. Gal 1-1/4 2-1/2 4 9-1/2 9-1/2 9-1/2
Valve Travel
Valve Size (in) 6 8 10 12 16 18 20 24
(in) 1 1-1/2 2 2-1/2 3 4 4 4
Flow Data - ACV S6100 (Globe) / S61100 (Angle)
6 8 10 12 16 18 / 20 / 24
6 8
C
I
H
H
A
B
D
E
F G
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Valve Cover Chamber Capacity
Valve Travel
Headloss
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