
Flow-coefficient
The flow coefficient (C
v
) 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 C
v
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 bar, multiply by .069
Standard Screens
SIZE OPENINGS STANDARD SCREENS
in. mm in. mm
2 - 3 50-80 0.045 1.143
3
⁄64" 304SS perf.
4 - 12 100-300 0.125 0.317
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
10000
1000
100
10
0.1 1 10
Liquid Flow (Water) - gpm
Strainer Size
Pressure Drop - psi
Consult Watts for information and availability of flanged basket strainers
manufactured of cast bronze, cast or fabricated steel (UL/FM) and stainless steel.
Also available are threaded and socket weld
1
⁄2" - 2"(15-50mm) cast steel
basket strainers.
A
B
C
E
(NPT)
Inlet
Bolted Cover
D
REMOVAL
SIZE DIMENSIONS CLEARANCE WEIGHTS
A B C D E (NPT)
in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
2 50 8
1
⁄8 206 8
3
⁄8 213 5 127 5
3
⁄8 137 1 25 22 9.9
2
1
⁄2 65 8
3
⁄4 222 9
5
⁄8 244 5
5
⁄16 135 6
5
⁄16 160 1 25 31 14.0
3 80 9
7
⁄8 251 11
1
⁄4 286 6
1
⁄2 165 8 203 1 25 42 19.0
4 100 11
1
⁄2 292 13
1
⁄2 343 8 203 9
5
⁄16 237 1 25 70 31.7
5 125 13
1
⁄8 333 14
5
⁄8 371 8 203 10
1
⁄4 260 1 25 90 40.8
6 150 14
7
⁄8 378 15
5
⁄8 397 8
5
⁄8 219 11
1
⁄8 283 1
1
⁄4 32 124 56.2
8 200 18
11
⁄16 475 21 533 11
3
⁄4 298 15
9
⁄16 395
3
⁄4 20 270 122.4
10 250 20
1
⁄8 511 24
1
⁄2 622 13
3
⁄4 349 18 457
3
⁄4 20 384 174.1
12 300 26
1
⁄4 667 29
3
⁄4 756 16
3
⁄8 416 23
1
⁄4 591 1 25 670 303.9
Dimensions — Weights
Dimensions shown are subject to change. Contact Watts for exact dimensions when required.
Performance Data
Table shows flows (gpm-water) at various pressure drops (psi)
using standard screens.
ES-97FB-CI 0934 © 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
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