Page 143 - Facility Piping Systems Handbook for Industrial, Commercial, and Healthcare Facilities

SOLID-LIQUID SEPARATION AND INTERCEPTORS

SOLID-LIQUID SEPARATION AND INTERCEPTORS 3.11

10000 38,000
9000 34,000
8000 30,000
7000 DN 250 26,500
6000 23,000
5000 19,000
4000 15,000
3500 DN 200
3000 11,400
2500
2000 7600
DN 150
1000 3800
900 3400
800 3000
700 DN 125 2650
600 2300
1900
500 DN 100 1500
FLOW IN GPM 300 1140 FLOW IN l/m
400
950
200
DN 65
570
150 DN 80 760
100 380
90 340
80 300
70 DN 50 265
60 230
50 190
40 150
30 115
20 75
15
1.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7.0 10 14 21 17 28 35 42 49 56 63 KPA
10
.1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 2 3 4 5 6 7 8 9 10 PSI
PRESSURE DROP
FIGURE 3.4 Presure drop through basket strainers (1/8 perforations).

FILTERS

FILTER CLASSIFICATIONS

In very general terms, a filter is used to remove and retain particles 45 μm (325 mesh) and
smaller. Although in practice there are overlapping ranges, the following represents general
guidelines.
For particles between 45 and 10 μm, depth-type filters are generally used. Below 10 μm,
membrane-type filters are generally selected. In the particulate size range between 10 and
0.02 μm, the separation process is referred to as microfiltration and the membrane filter is
still the most effective. When the size of particulates falls below about 0.02 μm, the removal

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