Standard screens, Performance data, Flow-coefficient – Watts 87SI User Manual
Page 2: Dimensions — weights
Standard Screens
SIze
OpenIngS
Standard ScreenS
in.
mm
in.
mm
1
⁄
2
- 2
15-50
0.032
0.813
1
⁄
32
" 304SS perf.
2
1
⁄
2
- 3
65-80
0.045
1.143
3
⁄
64
" 304SS perf.
Performance Data
Table shows flow rates (gpm-water) at various pressure
drops (psi) for standard screens.
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
strainer, 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
in. mm
3
80
2
1
⁄
2
65
2
50
1
1
⁄
2
40
1
1
⁄
4
32
1
25
3
⁄
4
20
1
⁄
2
15
Strainer
Size
gpm lpm
500 1900
100 380
10
38
1
3.8
.5
1.9
0.1
1
10
Flow
(water)
-
gpm
pressure drop - psig
a
c
npt
B
Inlet
cap
npt/SW
Dimensions — Weights
SIze
dImenSIOnS
WeIghtS
A
B
C (NPT)
in.
mm
in.
mm
in.
mm
in.
mm
lbs.
kgs.
1
⁄
2
15
2
5
⁄
16
59
1
9
⁄
16
40
3
⁄
8
10
0.5
.2
3
⁄
4
20
3
1
⁄
8
79
2
1
⁄
8
54
3
⁄
8
10
0.8
.3
1
25
3
5
⁄
16
84
2
5
⁄
8
67
1
⁄
2
15
1.5
.6
1
1
⁄
4
32
4
1
⁄
8
105
3
76
1
⁄
2
15
2.0
.9
1
1
⁄
2
40
4
11
⁄
16
119
3
3
⁄
16
81
1
⁄
2
15
2.8
1.2
2
50
5
7
⁄
16
138
3
13
⁄
16
97
1
⁄
2
15
4.3
2.9
2
1
⁄
2
65
7
7
⁄
8
200
5
5
⁄
16
135
1
1
⁄
4
32
13.0
5.8
3
80
8
7
⁄
8
225
5
15
⁄
16
151
1
1
⁄
4
32
18.0
8.1
Dimensions shown are subject to change. Contact Watts for exact dimensions when required.
ES-87SI 0933
© 2009 Watts
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