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Filtration Glossary
 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
 
  EFFECTIVE CROSS-SECTIONAL AREA
  Effective width times effective height.
   
  EFFECTIVE FILTRATION AREA
  The surface area of a filter (particularly pleated and cartridge filters) available for filtration, not the total area used to make the filter - some is taken up in seals, joints, etc. This is the opposite of blind spots or dead area.
   
  EFFECTIVE HEIGHT
  The total height of collecting surface measured top to bottom.
   
  EFFECTIVE LENGTH
  The total length of collecting surface measured direction of gas flow.
   
  EFFECTIVE WIDTH
  Total number of gas passages multiplied by spacing dimension of the collecting surfaces.
   
  EFFICIENCY
  The degree to which an element will perform in removing solids and/ or liquid, usually expressed as output divided by input.
   
  EFFICIENCY CURVE
  Graph showing the performance of a filter when challenged by specified artificial or natural contaminants under controlled condition. Penetration or efficiency may be plotted against particle size at constant face velocity.
   
  EFFLUENT
  The fluid that is passed through a filter (also known as filtrate or product stream). The outflow from other types of of treatment such as wastewater treatment plants.
   
  ELECTROSTATIC PRECIPITATOR
  A type of particulate filtration control that attracts charged particles to oppositely charged surfaces to collect airborne particulates. In this process, the particles are charged by ionizing the air with an electric field. The charged particles are then collected by a strong electric field generated between oppositely-charged electrodes.
   
  ELEMENT
  The medium used in a vessel to perform the function of filtration or separation. Also called the cartridge or filter. The porpous device which performs the actual process of filtration.
   
  ELEMENT CAP
  Component which covers one end of an element and holds the element in place in the housing. Sometimes called a yoke.
   
  ELONGATION
  Increase in fiber length or deformation from stretching. Measured as a percentage of original length.
   
  EMISSIONS
  Gases and/ or particles discharge into the environment, usually the atmosphere.
   
  EMULSION
  A finely divided suspension of an oil in water or vice versa. Also, a dispersion of finely held particles in a stream which do not necessarily dissolve in each other, but are held in suspension.
   
  END CAPS
  Components adhered to ends of an element with adhesive or by other means to contain medium in the form designed for the element.
   
  END SEAL
  Bond between the end cap and the filter medium. In cartridges of pleated paper construction this is frequently an epoxide, polyurethane or nitrile-phenolic adhesive. Also refers to the sealing device which seals the end cap of a cartridge to its housing.
   
  ENTRAINMENT
  Mist, fog or droplets of a liquid which are usually considered to be a contaminate when encountered in the filtration industry.
   
  EPA
  Environmental Protection Agency. The federal agency responsible for developing and enforcing environmental policy in the United States and its territories.
   
  EPITROPIC
  Fiber whose surface contains embedded particles to modify one or more properties of the fiber, typically electrical conductivity.
   
   
   
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