User Manual

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