Watts F1115-74 - Manual (Page 3)

8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.watts.com
C
lassiC
s
eries
F115-74 (Globe)
F1115-74 (Angle)
Sizing
Size (in) 1-1/4 1-1/2 2 2-1/2 3 4 6 8 10
Maximum Continuous (GPM) 100 150 200 300 460 800 1800 3100 4900
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 flow based on velocity of 20 ft. per second.
Maximum intermittent flow based on velocity of 25 ft. per second.
Minimum continuous flow based on velocity of 1 ft. per second.
Low-Flow By-Pass
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 continu-
ally in the cavitation zone should be
avoided. Consult Watts ACV for al-
ternatives.
Cavitation Chart
Pressure Drop
Flo
w
20
3/4”
1/2”
15 10 5
0
0
10
20
30
40
NOTE: The above chart is a suggested guide. Inlet pressure, outlet pressure, minumum, normal and maximum flow rates should
be considered for specific valve sizing. Contact Watts ACV for details.
Valve Size (in) By-Pass (in) Adjustment
Range
2-1/2 &
Smaller
1/2 20-200 psi
3 & Larger 3/4