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Glass Fibre (GF) Prefilters

Glass fiber prefilters, depth pre filters, for larger totally filterable volumes in clarification and sterile filtration.

Item no.:  13400--79-79---K

Availability:  On Request

The major use of the glass fiber filters is as a depth prefilter, placed directly on top of a membrane filter, whereby the prefilter diameter specified for the holder must be chosen. Larger diameters would intrude under the sealing ring of the holder and cause leakage. The standard type 13400 contains an acrlic binder. It has a high particle loading capacity, but for very polluted liquids the thicker type 13430 can be more effective. 13440 is a finer, binder-free type and is recommended for the prefiltration of relative clean solutions such as tissue culture media. Serial filtration may be necessary for difficult-to-filter liquids such as serum.


zh 19.0 MB


Laboratory Filtration Products (US and Canada)
en 9.6 MB

Product properties

  • Wettability
  • Grade
  • Type
    GF pre-filter standard (13400)
  • Format
    Filter discs
  • Material
    Glass microfibre
  • Membrane Color | Grid Color
    white (w/o grid)
  • Diameter
    ⌀ 79 mm
  • Pack Size
  • Packaging
    Non-sterile, bulk packed

Technical attributes

  • Area Weight
    71 g/m²
  • Extractable Content in Isopropanol
  • Extractable Content in Water
  • Maximum Transmission DOP 5.33 cm/s (ASTM D2986-95A)
  • Total Throughput
    Δ p ="" 1 bar | 100 kPa | 14.5 psi, 320 mL / min / cm²
  • Thickness according to DIN 53105
    550 µm
  • Flow Rate for Water (at 1 bar)
    295 – 381 mL/min
  • Sterilization Procedures
    • By dry heat at 180 °C
    • Autoclaving at 121 °C or 134 °C
  • Thermal Stability
    220 °C