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Cartridge filter

Technical guides

Cartridge filter guides

The questions asked most often in the field about choosing a cartridge filter: which micron rating, which end cap, which seal and when to replace the cartridge. Each guide starts with a short answer, then goes into the technical detail.

Guides on this topic

Guides are reviewed by our engineering team.

O-rings and gaskets for filters
Guide
Cartridge filter|Filter housing|Seals and connections

O-ring and gasket materials: choosing filter seals by chemical resistance

Compare the temperature and chemical resistance of NBR, EPDM, Viton, silicone and PTFE seals, and choose the right O-ring for your filter.

30 October 2026
7 min read
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When to replace a cartridge filter
Guide
Cartridge filter|Filter housing

When to replace a cartridge filter: maintenance by differential pressure

A cartridge filter is replaced not by the calendar but by the pressure difference (ΔP) between the inlet and outlet gauges. For melt blown and string-wound cartridges, replacement is typically planned when ΔP reaches 2.0–2.4 bar.

30 October 2026
4 min read
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Cartridge filter end caps
Guide
Cartridge filter|Seals and connections

Cartridge filter end caps: DOE, SOE, 222 and 226 explained

Cartridge filters have two main end designs: double open end (DOE) and single open end (SOE). A DOE cartridge seals by compressing its flat gaskets, while an SOE cartridge seals by seating its 215, 222 or 226 O-ring adapter in the housing socket.

30 October 2026
5 min read
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Nominal and absolute filtration compared
Guide
Cartridge filter|Filtration basics

Nominal vs absolute micron rating: which should you ask for?

A nominal micron rating means the filter retains most particles of that size; for felt bags this is typically 80–95%. An absolute micron rating means almost all particles larger than that size are retained, which requires a membrane with uniform pores.

30 October 2026
4 min read
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PROSES TİCARET, İMALAT, MÜHENDİSLİK ENDÜSTRİYEL MADDE VE MALZEME İMALATI İNŞAAT VE SANAYİ LİMİTED ŞİRKETİ
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Musa Gündüz Cad. No:14 Taşköprü – Çiftlikköy – YALOVA, TÜRKİYE
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E-invoice / e-archive email address

[email protected]
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Tax office

Yalova Tax Office (Yalova V.D.)
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Tax ID number

7330379514
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MERSIS number

0733037951400013
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Please send BA/BS forms, current account reconciliations and any other emails for our Finance and Administrative Affairs Department to [email protected].

Invoice name (registered company name): PROSES TİCARET, İMALAT, MÜHENDİSLİK ENDÜSTRİYEL MADDE VE MALZEME İMALATI İNŞAAT VE SANAYİ LİMİTED ŞİRKETİ Billing address: Musa Gündüz Cad. No:14 Taşköprü – Çiftlikköy – YALOVA, TÜRKİYE E-invoice / e-archive email address: [email protected] Tax office: Yalova Tax Office (Yalova V.D.) Tax ID number: 7330379514 MERSIS number: 0733037951400013
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