Lassic, Eries – Watts LFF1115 User Manual
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3
C
lassiC
s
eries
Sizing
CAVITATION ZONE
INLET PRESSURE - PSI
OUTLET PRESSURE - PSI
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
10 20
40
50
60
70
80
90
130 140
120
110
100
30
CAVITATION CHART
After selecting the valve size, locate inlet and outlet pressures on this chart. If the intersection point falls
in the shaded area, cavitation can occur. Operation of valves continually in the cavitation zone should be
avoided. Consult Watts ACV for alternatives.
Cavitation Chart
Size (in)
1-1/4
1-1/2
2
2-1/2
3
4
6
8
10
Maximum Continuous (GPM)
95
130
210
300
485
800
1850
3100
5000
Maximum Intermittent (GPM)
119
161
265
390
590
1000
2300
4000
6250
Minimum Continuous (GPM)
1
1
1
20
30
50
115
200
300
Maximum continuous fl ow based on velocity of 20 ft. per second.
Maximum intermittent fl ow based on velocity of 25 ft. per second.
Minimum continuous fl ow based on velocity of 1 ft. per second.
NOTE: The above chart is a suggested guide. Inlet pressure, outlet pressure, minumum, normal and maximum fl ow rates should
be considered for specifi c valve sizing. Contact Watts ACV for details.
LFF115 (Globe)
LFF1115 (Angle)