Difference between revisions of "Absolute Filters"

From SolidsWiki
Jump to navigation Jump to search
(Created page with "Category:Filtration{{Knoppen}} <noinclude><!------------------------------------------------ * READ THIS FIRST * Only edit this page if you can improve the content. * Improp...")
 
 
(3 intermediate revisions by 2 users not shown)
Line 1: Line 1:
[[Category:Filtration]]{{Knoppen}}
[[Category:Filtration]]{{Knoppen}}
<noinclude><!------------------------------------------------
[[File:Absolute_Filters_01.jpg|thumb|right|Absolute Filter]]
* READ THIS FIRST
[[File:Absolute_Filters_02.jpg|thumb|right|Fine or Absolute Filter parts]]
* Only edit this page if you can improve the content.
[[File:Absolute_Filters_03.jpg|thumb|right|Absolute Filter]]
* Improper use of this page will lead to permanent banning.
[[File:Absolute_Filters_process_outline.jpg|thumb|right|Working outline of absolute filters]]
* Please do not edit the sponsored link on the top right corner.
 
* Please start editing this page after the /noinclude
An '''absolute filter''' is a [[Filters|filter]] capable of cutting off 100% by weight of  solid particles greater than a stated micron size. Absolute Rating is a  term used to describe or define the degree of filtration of absolute  filter. Various methods are used to determine absolute ratings which are  not necessarily interchangeable. Generally absolute means 100% removal  of solids above a specified micron size by use of absolute filter. Below  please find suppliers of absolute filter.
* -------------------------------------------------></noinclude>
 
This page is still empty. If you know something about this product, please share your knowledge with others.
       
Reasons  of areas with an important need for eliminating submicron particles  could be bomb shelters gas masks, optic and precision mechanical  production, sensitive electronic components computer, nuclear  inslallation clean room systems pharmaceutical industry laminar flow  workirg bench, hospilal slerile areas, space application food processing  zones, biological centre and many more. Air filters with an extremely high collecting efficiency were required for above specific areas.
 
 
The Absulule (HEPA) Filter  consist of frame in which the  media is inserted is highly folded form. The filers are held open by  corrugated sepearators. The media is produced from highly waler  repellent and temperature resistant 100% microglass, High Strength fiber  paper. The folded configuration provides an exceptionly large fltering  area in proportion to the face area of the filter.Separator design that  provides significant advantage controlled media sparing for virtully no  turbulance low friction uniform velocity, uniform dust holding optimum  filter performance.
 
 
The air velocity through the media is very low, normally abot  2-2.5 cm/sec. The seperators are safe edge tapered aluminum or plastic.  The absolutes are supplied as standard with gasket of either closed cell  neoprene are if desired and at on extra charge with silicon gasket. The  gaskets are provided at air entry side and air exit side.
 
==Working Principle==
Absolute filters are like conventional fabric filters with small pores at the surface (e.g. a layer of PFTE membrane). Dust particles are collected only by the sieve effect at the outer surface of the filter, due to the very small size of the outer pores, leading to very high efficiencies. They are classified by their minimum collection efficiency. HEPA (High Efficiency Particulate Air) filters have by definition a removal efficiency of more than 99.97% for particles of 0.3μm. ULPA (Ultra Low Penetration Air) filters have by definition a removal efficiency of more than 99.9995% for particles of 0.12μm. Some extended media filters are capable of much higher efficiencies. The collection efficiency increases with increasing filtration velocity and particle size and with dust cake thickness and density. Both types of filters have overall efficiencies that vary with particulate loading.
 
 
==Application areas==
*Nuclear installations
*Clean-room Systems
*Pharmaceutical industry
*Laminar Flow Working Bench
*Hospital Sterile areas
*Space applications
*Food processing zone
*Biological Centers
 
 
==Types==
*Single filters and strainers.
*Dual-duplex filters and strainers.
*Manual and fully automatic filters and strainers.
*Gravity, medium and high pressure filters to 10,000 psig
*Vacuum pump inlet filters and exhaust filters.
*Instrumentation protection filters.
*Cartridge filters.
*Specialist membrane and coalescing filters for gases and high purity air requirements.
 
 
==Video==
<youtube>-jaLsFuItM8</youtube>

Latest revision as of 00:04, 18 February 2013

Absolute Filter
Fine or Absolute Filter parts
Absolute Filter
Working outline of absolute filters

An absolute filter is a filter capable of cutting off 100% by weight of solid particles greater than a stated micron size. Absolute Rating is a term used to describe or define the degree of filtration of absolute filter. Various methods are used to determine absolute ratings which are not necessarily interchangeable. Generally absolute means 100% removal of solids above a specified micron size by use of absolute filter. Below please find suppliers of absolute filter.


Reasons of areas with an important need for eliminating submicron particles could be bomb shelters gas masks, optic and precision mechanical production, sensitive electronic components computer, nuclear inslallation clean room systems pharmaceutical industry laminar flow workirg bench, hospilal slerile areas, space application food processing zones, biological centre and many more. Air filters with an extremely high collecting efficiency were required for above specific areas.


The Absulule (HEPA) Filter consist of frame in which the media is inserted is highly folded form. The filers are held open by corrugated sepearators. The media is produced from highly waler repellent and temperature resistant 100% microglass, High Strength fiber paper. The folded configuration provides an exceptionly large fltering area in proportion to the face area of the filter.Separator design that provides significant advantage controlled media sparing for virtully no turbulance low friction uniform velocity, uniform dust holding optimum filter performance.


The air velocity through the media is very low, normally abot 2-2.5 cm/sec. The seperators are safe edge tapered aluminum or plastic. The absolutes are supplied as standard with gasket of either closed cell neoprene are if desired and at on extra charge with silicon gasket. The gaskets are provided at air entry side and air exit side.

Working Principle

Absolute filters are like conventional fabric filters with small pores at the surface (e.g. a layer of PFTE membrane). Dust particles are collected only by the sieve effect at the outer surface of the filter, due to the very small size of the outer pores, leading to very high efficiencies. They are classified by their minimum collection efficiency. HEPA (High Efficiency Particulate Air) filters have by definition a removal efficiency of more than 99.97% for particles of 0.3μm. ULPA (Ultra Low Penetration Air) filters have by definition a removal efficiency of more than 99.9995% for particles of 0.12μm. Some extended media filters are capable of much higher efficiencies. The collection efficiency increases with increasing filtration velocity and particle size and with dust cake thickness and density. Both types of filters have overall efficiencies that vary with particulate loading.


Application areas

  • Nuclear installations
  • Clean-room Systems
  • Pharmaceutical industry
  • Laminar Flow Working Bench
  • Hospital Sterile areas
  • Space applications
  • Food processing zone
  • Biological Centers


Types

  • Single filters and strainers.
  • Dual-duplex filters and strainers.
  • Manual and fully automatic filters and strainers.
  • Gravity, medium and high pressure filters to 10,000 psig
  • Vacuum pump inlet filters and exhaust filters.
  • Instrumentation protection filters.
  • Cartridge filters.
  • Specialist membrane and coalescing filters for gases and high purity air requirements.


Video