Flow-coefficient, Standard screens, Performance data – Watts 77F-CSSI User Manual
Page 2: Dimensions — weights
ES-77F-CSSI 0930
© Watts, 2009
Flow-coefficient
The flow coefficient (Cv) is the number of gallons per minute
of water flowing through a given size restriction at a pressure
drop of one psi. To obtain the Cv factor for a given size strain-
er, read capacity at intersection with the one (1)
psi pressure drop.
Conversions:
For gpm to lpm, multiply by 3.8
For psi to bars, multiply by .069
Standard Screens
SIze
OpeNINgS
StaNdard SCreeNS
in.
mm
in.
mm
1
/
2
- 1
1
/
2
15-40
0.032
0.813
1
⁄
32
304SS perf.
2 - 3
50-80
0.045
1.143
3
⁄
64
304SS perf.
4 - 6
100-150
0.125
3.175
1
⁄
8
304SS perf.
in. mm
12 300
10 250
8 200
6 150
5 125
4 100
3
80
2
1
⁄
2
65
2
50
1
1
⁄
2
40
1
1
⁄
4
32
1
25
3
⁄
4
20
1
⁄
2
15
10000
1000
100
10
1
.7
Flow
(water)
-
gpm
Strainer
Size
pressure drop - psi
0.1
1
10
a
C
Npt
B
Inlet
Performance Data
Table shows flows (gpm-water) at various pressure drops (psig)
using standardly furnished screens.
SIze
dImeNSIONS
WeIghtS
A
B
C (NPT)
in.
mm
in.
mm
in.
mm
in.
mm
lbs.
kgs.
1
⁄
2
15
6
152
3
7
⁄
8
98
1
⁄
4
8
6
2.4
3
⁄
4
20
7
178
4
1
⁄
4
108
3
⁄
8
10
7
2.9
1
25
7
1
⁄
2
191
4
3
⁄
4
121
1
⁄
2
15
9
4.0
1
1
⁄
2
40
9
229
5
5
⁄
8
143
1
⁄
2
15
12
5.4
2
50
8
5
⁄
8
219
5
1
⁄
4
133
1
⁄
2
15
20
9.0
2
1
⁄
2
65
10
1
⁄
4
260
7
1
⁄
2
191
3
⁄
4
20
32
14.5
3
80
11
5
⁄
8
295
7
195
1
25
36
16.3
4
100
14
3
⁄
8
365
9
1
⁄
8
232 1
1
⁄
2
40
61
27.6
6
150
18
5
⁄
8
473
13
330
2
50
160
72.5
Dimensions shown are subject to change. Contact Watts for exact dimensions
Dimensions — Weights
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
A Watts Water Technologies Company