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Filtration Glossary | | | | | VACUUM | | A reference to a pressure that measures below atmospheric pressure. | | | | VISCOSITY | | A liquid has a viscosity of one poise if a force of one dyne per square centimetre causes two parallel liquid surface one square centimetre in area and one centimetre apart to move past one another at a rate of one centimetre per second. There are a great many crude and empirical methods for measuring viscosity which generally involve measurement of the time of flow or movement of a ball, ring, or other object in a specially shaped or sized apparatus. The viscosity of water is 1 centipoise. | | | | VITON A | | Trade name for material used in gaskets and o-ring. | | | | VOLUMETRIC FLOW RATE | | Fluid flow expressed as a volume flowing per unit of time (cc3/sec., ft3/min., etc.). | | | | | | | | | | |
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