Microfil™ Junior

Absolute Rated Pleated Glass Fibre Cartridge Filters for Small-Scale Applications

A range of absolute rated cartridge filters from Porvair Filtration Group, designed for retrofitting into existing Junior-style housings. Featuring the latest developments in borosilicate glass fibre filter media technology, Microfil™ Junior Junior 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™ Junior 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

J-style: Silicone (other materials are available on request).
S-style: Not supplied.

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.


Operating Temperature

Maximum continuous: 60°C (140°F)

Integrity Testing

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

Effective Filtration Area

Absolute Removal Rating Effective Filtration Area (for 5" cartridge)
0.5, 0.8, 1.0, 2.0 and 5.0μm 0.15m2 (1.6ft2)

Maximum Differential Pressure

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