Watts 77F-CSSI - Manual (Page 2)

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