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  Filter Holders

Glass Vacuum Filter Holders - Filter Compatibility,   Cleaning and Maintenance

Filter Compatibility

Filter Holder
Size (mm)

Filtration Area (cm2)

Membrane diameter (mm)

Prefilter Size (mm)

with membrane

when used alone

13

1.1

25

N.R.

25

25

2.1

25

16

25

47

9.6

47

35

47

90

38.5

90

70

90

N.R. = not recommended

Cleaning and Maintenance

  • All components may be cleaned with a standard, low-alkaline, non-abrasive detergent such as Alconox or Liquinox.
  • Routinely inspect surfaces for chips and scratches
  • Certain oils may remove markings from glassware. Avoid getting oil on the outside of the filter holder.
  • Fritted glass bases should be examined periodically to see if the frit might be clogged, possibly causing loss of effective filtration area. Frits can be cleaned by backflushing with water and gently scrubbing the surface with a brush or laboratory wiper. If the frit is still clogged, soak the base without stopper overnight in a cleaner such as Nochromix, and use vacuum filtration to rinse the frit thoroughly with distilled water.
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Avoid using cleaners containing chromic acid, as these are dangerous and produce hazardous (carcinogenic) waste.

Sterilization

Wrap assembly in Kraft paper or other steam permeable paper. Autoclave for 20 minutes at 121º C (250º F), fast exhaust. Holders can be used after they have cooled and can be handled without gloves. Individual components may be UV sterilized but not the entire assembly: be sure components are dry before UV sterilization.

 

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