4
ES-A-ACV-LF981GD 2115
© 2021 Watts
Flow Data
Valve Travel
Valve Size - Inches
1
1/4
1
1/2
2
2
1/2
3
4
6
8
10
12
14
16
Travel - Inches
3/8
3/8
1/2
5/8
3/4
1
1
1/2
2
2
1/2
3
3
1/2
4
Valve Cover Chamber Capacity
Valve Size - Inches
1
1/4
1
1/2
2
2
1/2
3
4
6
8
10
12
14
16
fl.oz.
4
4
4
10
16
22
70
U.S. Gal
1
1/4
2
1/2
4
6
1/2
9
1/2
Valve Size - Inches
1
1/4
1
1/2
2
2
1/2
3
4
6
8
10
12
14
16
Maximum Continuous
Flow Rate Gpm (Water)
95
130
210
300
485
800
1850
3100
5000
7000
8500
11100
Maximum Intermittent
Flow Rate Gpm (Water)
119
161
265
390
590
1000
2300
4000
6250
8900
10800
14100
Minimum Flow Rate Gpm (Water)
3
5
6
9
15
16
17
25
55
70
190
400
C
V
Factor GPM (Globe)
26
26
48
75
112
188
387
764
1215
1734
2234
3131
C
V
Factor GPM (Angle)
26
27
57
91
125
207
571
889
1530
1945
Pressure Drop (psi)
2
3
4
6
8
10
20
30
40
60
80
100
Flow Rate - Gallons per minute (Water)
2
4
10
20
40
60 80 100
200
500
1000
2000
5000
10000
20000
100000
8
6
4
8
10
12 14 16
6
2
1½
1¼
2½
3
8
10
12
6
4
3
2½
2
1¼ 1½
Angle
Globe
C
V
Suggested
•
Maximum continuous flow based on velocity of 20 ft. per second.
•
Maximum intermittent flow based on velocity of 25 ft. per second.
•
Minimum flow rates based on a 20-40 psi pressure drop.
•
The C
v
Factor of a value is the flow rate in US GPM at 60°F that will
cause a 1psi drop in pressure.
•
C
v
factor can be used in the following equations to determine Flow
(Q) and Pressure Drop (∆P):
Q (Flow) = C
v
√∆P ∆P (Pressure Drop) = (Q/C
v
)
2
•
The C
v
factors stated are based upon a fully open valve.
•
Many factors should be considered in sizing control valves
including inlet pressure, outlet pressure and flow rates.
•
For sizing questions including cavitation analysis consult Watts
with system details.
