Specification Sheet

Capacity
Series 757, 757N flow curves as tested by Underwriters Laboratory.
Flow characteristics collected using butterfly shutoff valves
Horizontal Vertical N - Pattern
psi
14
12
10
8
6
4
2
0
0 50 100 150 200 250 300 350 gpm
0 190 380 570 760 950 1140 1330 lpm
7.5 15 fps
psi
12
10
8
6
4
2
0
psi
12
10
8
6
4
2
0
0 100 200 300 400 500 gpm
0 380 760 1140 1520 1900 lpm
7.5 15 fps
2
1
⁄2"
3"
0 300 600 900 1200 1500 gpm
0 1140 2280 3420 4560 5700 lpm
7.5 15 fps
6"
0 100 200 300 400 500 600 700 800 gpm
0 380 760 1140 1520 1900 2280 2660 3040 lpm
7.5 15 fps
4"
psi
12
10
8
6
4
2
0
0 500 1000 1500 2000 2500 3000 3500 gpm
0 1900 3800 5700 7600 9500
11400 13300 lpm
7.5 fps
10"
psi
12
10
8
6
4
2
0
0 500 1000 1500 2000 2500 gpm
0 1900 3800 5700 7600 9500 lpm
7.5 15 fps
8"
psi
24
20
16
12
8
4
0
N
V
H
H
N
V
N
V
H
N
V
H
N
H
V
N
H
V
NOTICE
Inquire with governing authorities for local installation
requirements
Flow capacity chart identifies valve performance
based upon rated water velocity up to 25fps
• Service Flow is typically determined by a rated
velocity of 7.5fps based upon schedule 40 pipe.
• Rated Flow identifies maximum continuous duty
performance determined by AWWA.
• UL Flow Rate is 150% of Rated Flow and is not
recommended for continuous duty.
• AWWA Manual M22 [Appendix C] recommends
that the maximum water velocity in services be
not more than 10fps.
*UL Rated Flow
*UL Rated Flow
Rated Flow
Rated Flow
Rated Flow
Service Flow
Service Flow
PSI DROP
(*FRICTION LOSS)
PSI DROP
(*FRICTION LOSS)
*UL Rated FlowRated FlowService Flow
PSI DROP
(*FRICTION LOSS)
*UL Rated FlowService Flow
PSI DROP
(*FRICTION LOSS)
*UL Rated FlowRated Flow
Service Flow
PSI DROP
(*FRICTION LOSS)
*UL Rated FlowRated FlowService Flow
PSI DROP
(*FRICTION LOSS)
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