Microfil™ GP

Absolute Rated Pleated Glass Fibre Cartridge Filters

A range of absolute rated cartridge filters from Porvair Filtration Group, featuring the latest developments in borosilicate glass fibre filter media technology, MicrofilTM GP cartridges are constructed from robust glass fibre and polypropylene filtration layers, offering removal ratings from 0.5 to 5 micron absolute.

Features and Benefits

  • Guaranteed removal ratings
    Microfil™ GP cartridges are validated using the recognised industry standard modified OSU-F2 single pass test to Beta 5000 (99.98% efficiency).

Materials of Manufacture

Filter media: Glass fibre
Prefiltration layer: Polypropylene
Support layers: Polypropylene
Inner core: Polypropylene
Outer support: Polypropylene
End fittings: Polypropylene
Support ring: Stainless steel

Gaskets and O-Rings

Ethylene Propylene, PTFE encapsulated, Silicone, Viton, Nitrile or Polypropylene felt.

Maximum Differential Pressure

Normal flow direction at:
20°C (68°F): 6.0 bar (87lb/in2)
80°C (176°F): 4.0 bar (58lb/in2)
100°C (212°F): 3.0 bar (43lb/in2)
120°C (248°F): 2.0 bar (29lb/in2)

Operating Temperature

Maximum continuous: 60°C (140°F)

Integrity Testing

Microfil™ GP filter cartridges are batch tested for integrity using the Bubble Point Test. Procedural details are available from Porvair.


  • Foods and Beverages
  • Process Water Systems
    The filtration of process water installations for removal of general contamination and resin fines. The naturally occurring zeta-potential of glass fibre in aqueous solutions makes the MicrofilTM GP filter ideal for removing submicronic particles.
  • Pharmaceuticals and Bioprocessing
    The excellent dirt holding capacity of the Microfil™ GP makes it an ideal choice for prefiltration of complex biological fluids (e.g. cell culture media).
  • Fine Chemicals
    The filtration of high grade chemicals including solvents, reagents, photographic emulsions, inks and paints.
  • Cosmetics

Effective Filtration Area

Absolute Removal Rating Effective Filtration Area (each 254mm (10") module)
0.5, 0.8, 1.0, 2.0 and 5.0μm 0.4m2 (4.4ft2)

Clean Water Flow Rates

  • Typical clean water flow rate:
    A 254mm (10”) Microfil™ GP single cartridge exhibits the flow-ΔP characteristics indicated below, for solutions with a viscosity of 1 centipoise.


Product Attributes
RR0.5; 0.8; 1.0 and 5.0μ absolute Beta 5000
MT60 ̊C
MoCBorosilicate glass fibre media/polypropylene
MDP6 bar @20 ̊C
SA 0.4m2
Brand Porvair
Q FDA 21CFR177-1520
RR Retention Rating
MT Maximum temperature recommended of a working product in degrees centigrade
MoC Primary material of construction
MoC Primary material of construction
MP Maximum working pressure of housing in bar
Brand Manufacturing brand name supplying the product
FE Filter efficiency
Q Quality assurances and certificates validating this product