Headloss, Valve cover chamber capacity, Valve travel – Watts S6518 / S61518 User Manual
Page 2
Headloss
Flow Rate - Gallons per minute (Water)
Pressure Drop (psi)
Angle
Globe
2
4
6 8 10
20
40
60 80 100
200
500
1000
2000
5000
10000
20000
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 value is the flow rate in US GPM at 60°F that will cause a 1psi 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 (∆P):
Q (Flow) = C
v
√∆P ∆P (Pressure Drop) = (Q/C
v
)
2
ES-ACV-S6518-S61518 1219
© 2012 Watts
USA: Tel. (713) 943-0688 • (713) 944-9445 • www.watts.com
A Watts Water Technologies Company
S6518 / S61518 — Reduced Port Stainless Steel Dual Chamber
Basic Valve with Mechanical Check Feature
6
8
10
12
16
18 / 20 / 24
6
8
Flow Data - ACV S6518 (Globe) / S61518 (Angle)
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
CV Factor GPM (Globe)
224
489
932
1428
2067
2881
2881
2881
CV Factor GPM (Angle)
237
534
Estimated
Valve Cover Chamber Capacity
Valve Size - Inches
6
8
10
12
16
18
20
24
fluid 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 - Inches
6
8
10
12
16
18
20
24
Travel - Inches
1
1-1/2
2
2-1/2
3
4
4
4