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Filtration Glossary | | | | | ULTRAFILTRATION (UF) | | A separation method operating at 50-200 psi in crossflow filtration mode. Efficiency is approximately 90%. Used to separate large molecules according to their molecular weight. | | | | UNIFORMITY COEFFICIENT | | Specification factor applied to the sizing of the sand used in water filtration plants. Ratio of the mesh size of the sieve which permits 60% to pass through to the 10%”through size” in the test sieving of a sand. Common size under for these filters is 0.4 to 0.6 mm, and usually specified to be not larger than 1.7. | | | | UPSTREAM SIDE (of filter) | | The feed side of the filter. | | | | | | | | |
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