Absolute rated pleated cartridge featuring up to eight separate filtration layers providing true depth filtration. This design reduces the fouling of the filter surface area caused by a broad spectrum of contaminants. Ideal for fluids that contain contaminants with a wide range of particle sizes.

Absolute Rated Pleated Depth Filters

A range of absolute rated cartridge filters from Porvair Filtration Group, featuring the latest developments in meltblown polypropylene filter media technology, Klearfil™ cartridges are based on a robust all polypropylene construction, offering removal ratings from 0.5 to 75 micron absolute.

The combination of up to eight separate filtration layers provides true depth filtration, within a pleated cartridge construction. This design will reduce fouling of the filter surface area caused by a broad spectrum of contaminants.

Klearfil™ cartridges are ideally suited for the filtration of process fluids, that contain contaminants with a wide range of particle sizes.

Materials of Manufacture

Filter media: Polypropylene
Inner core: Polypropylene
End fittings: Polypropylene
Support layers: Polypropylene
Outer support: 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)

Particle Retention Rating

Code Pore Rating
Absolute Rating
99.98% Beta 5000 (microns)
Nominal Rating
99.90% Beta 1000 (microns)
Nominal Rating
90.00% Beta 10 (microns)
KP5 0.5 0.5 0.45 -
K01 1 1 0.7 -
K02 2 2 1.5 -
K03 3 3 2 -
K05 5 5 3 -
K10 10 10 8.5 2
K15 15 15 12 4
K20 20 20 13.5 <5
K30 30 30 20 7
K40 40 40 27.5 11
K75 75 75 65 20


Klearfil™ cartridges provide absolute filtration where reproducibility and consistency of performance are critical. Suitable for the filtration of aqueous and organic liquids, Klearfil™ cartridges can be used as prefilters or final filters in the following applications:

  • Pharmaceuticals and Bioprocessing
  • Foods and Beverages
  • Process Water Systems
  • Fine Chemicals
  • Cosmetics
  • Graded multi-layer media
  • Full traceability
  • Environmentally friendly
  • Guaranteed removal ratings
    Klearfil™ cartridges are validated using the recognised industry standard modified OSU-F2 single pass test to Beta 5000 (99.98% efficiency).
  • Suitable for steam and hot water sanitisation
    Klearfil™ cartridges are resistant to repeat steam sterilisation up to 135°C (275°F) and hot water cycles at up to 90°C (194°F).

Clean Water Flow Rates

  • Typical clean water flow rate:
    A 254mm (10”) Klearfil™ single cartridge exhibits the flow-ΔP characteristics indicated below, for solutions with a viscosity of 1 centipoise.
  • Other solutions:
    For solutions with a viscosity of greater than 1 centipoise, multiply the indicated differential pressure by the viscosity in centipoise.

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