Polyfil™ II

Absolute Rated Pleated Polypropylene Cartridge Filters

A range of absolute rated cartridge filters from Porvair Filtration Group, featuring the latest developments in meltblown polypropylene filter media technology, Polyfil™ II cartridges are based on a robust all polypropylene construction, offering removal ratings from 0.5 to 105 micron absolute.

Features and Benefits

  • Guaranteed removal ratings
    Polyfil™ II 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: 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, 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)
125°C (248°F): 1.5 bar (29lb/in2)
Reverse flow direction at:
20°C (68°F): 2.1 bar (30lb/in2)
80°C (176°F): 1.0 bar (15lb/in2)
100°C (212°F): 0.5 bar (7lb/in2)

Operating Temperature

Maximum continuous: 80°C (176°F)

Integrity Testing

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

Effective Filtration Area

Up to 0.6m2 per 250mm module (depending on pore rating).


  • Pharmaceuticals and Bioprocessing
    The batch preparation of intermediates used in the manufacture of pharmaceutical and bioprocessed products. Used as prefilters to extend the life of membrane filters.
  • Foods and Beverages
    The clarification of beers, wines and spirits to a clear and bright finish without affecting taste or colour.
  • Inks and coatings
    For removal of agglomerates and gels with minimal loss of product.
  • Fine Chemicals
  • Process Water Systems
  • Suitable for steam and hot water sanitisation
    Polyfil™ cartridges are resistant to repeat steam sterilisation up to 135°C (275°F) and hot water cycles at up to 90°C (194°F).
  • Cosmetics

Clean Water Flow Rates

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

Photo Photo Photo

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