Lassic, Eries, Headloss – Watts F1113-12RFP User Manual
Page 3: Flow data
C
lassiC
s
eries
12541 Gulf Freeway
•
Houston, Texas 77034
•
(Ph) 713.943.0688
•
(Fx) 713.944.9445
•
www.watts.com
Headloss
1
1/4
1
1/2
2
1/2
2
3
4
6
8
10
1
1/4
2
1/2
1
1/2
2
3
4
6
8
10
100000
20000
10000
5000
1000
500
100
50
10
5
1
1
5
10
50
100
Pr
es
su
re
D
iff
er
en
ce
p
si
Flow Rate - Gallons per minute (Water)
Globe
Angle
Valve Size - Inches
1-1/4
1-1/2
2
2-1/2
3
4
6
8
10
Maximum Continuous Flow Rate Gpm
(Water)
93
125
208
300
460
800
1800
3100
4900
Maximum Intermittent Flow Rate Gpm
(Water)
115
158
260
370
570
1000
2300
3900
6000
CV Factor GPM (Globe)
29
34
55
75
125
220
460
775
1200
CV Factor GPM (Angle)
39
53
66
99
170
280
650
1100
1600
Flow Data
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 1 psi drop in pressure.
The factors stated are based upon a fully open valve.
Cv 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
F113-12RFP (Globe)
F1113-12RFP (Angle)