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PPGUARD® Polypropylene Microfiber

A high efficiency, long service life filter constructed entirely of polypropylene microfiber.

PPguard® filters are high efficiency depth type filters constructed entirely of chemically resistant polypropylene (PP). They are economical, premium quality products that deliver consistently high filtration efficiency, superior flow rates, substantial dirt holding capacity, and exceptionally long service life. All-polypropylene construction makes PPguard® filters a cost-effective choice for clarification and prefiltration applications.


- Biological products

- Biopharmaceuticals

- Vaccines

- Serum, plasma fractions and other blood products

- Tissue and cell culture media

- Protein solutions

- Fermentation media and feeds

- Cell removal from fermentation broth

- Pre-column chromatography


- Nominal ratings from 0.2 µm to 99 µm 

- Self-bonded, non fiber-releasing filter media

- All-polypropylene construction

- Ultraclean – no binders, adhesives or surfactants

- High flow rates

- High dirt holding capacity

- Wide chemical compatibility

- Cleanroom manufactured


100% Polypropylene construction SEM photo

Typical water flow rates per 10" cartridge
Screenshot 2021-06-12 at 8.25.32 AM
Materials of Construction

Filter Media:                   Polypropylene

Upstream Support:         Polypropylene

Downstream Support:     Polypropylene

Core/Outer Guard:          Polypropylene

End Caps:                      Polypropylene

Sealing Method:             Thermal Bonding

O-ring/Gasket Seal:        EPR, polyethylene, silicone

Maximum Operating Temperatures and Pressures

Δp 80 psi @ 32 °F to 100 °F (Δp 5,5 bar @ 0 °C to 38 °C)

Δp 60 psi @ 150 °F (Δp 4,1 bar @ 66 °C)

Δp 30 psi @ 180 °F (Δp 2,1 bar @ 82 °C)


Steam-in-place (SIP): Saturated steam @ 121-135 °C, 30-60 minutes [15 psi (1 bar) to 30 psi (2 bar), 30-60 minutes]

Autoclave: 121-135 °C, 30-60 minutes 

PPguard® cartridges are capable of repeated sterilization cycles. For applications requiring autoclave/SIP, a stainless steel reinforcement ring must be ordered. See “Reinforcement Ring Option” within “Ordering Information.”


Product Photo