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Filtration Glossary | | | | | OEM | | Original Equipment Manufacturer. | | | | OPEN AREA RATIO | | The ratio of pore area of a filter medium, expressed as a percent of total area. | | | | ORGANIC | | Decribes the vast number of chemical substances containing carbon, hydrogen and oxygen. | | | | OUTLET PRESSURE | | The pressure exiting the outlet side of the filter. Also called downstream pressure. | | | | OSMOSIS | | Diffusion of a solvent through a semi-permeable membrane from a dilute solution into a more concentrated solution, thus tending to equalize the concentration of each side of the membrane. | | | | OUTER SHELL | | Outer covering of an element, usually perforated or screen. | | | | OUTER WRAP | | Outside covering of an element. | | | | OUTSIDE COLLECTOR | | Particles collected on the outside of the filter. (Pulse-jet/ plenum pulse baghouses and some reverse air). | | | | OUTSIDE-IN | | Flow of product from outside to inside of element. | | | | | | | | | | |
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