High-flow cartridges have a diameter of about 165 mm, much larger than standard cartridges. One HF cartridge replaces many standard ones, so housings are smaller and cartridge changes are faster. They are used in large RO plants and industrial water systems.
Key features
- Up to 40 m³/h per cartridge
- Fewer cartridges to stock and replace
- Single housings or multi-cartridge modules up to 320 m³/h
- Filter rating 0.5 – 100 µm, standard 5 µm
Choosing and replacing cartridges
- How many cartridges? A standard PP cartridge (Ø60–64 mm) handles up to about 1.1 m³/h per 10 inches of length. For 20 m³/h, use a 5 × 40″ housing (22 m³/h) or a 7 × 30″ housing (23.1 m³/h).
- Filter rating: 5 µm is the usual choice before RO. Melt-blown, string-wound and carbon membrane cartridges are rated nominally; some RO membrane makers recommend 5 µm absolute, so tell our engineers if your RO system requires it.
- When to replace: when the pressure drop across the cartridge reaches 1 bar, or when a carbon cartridge is saturated. In front of RO membranes, DuPont recommends replacing cartridges at least every 3 months.
- Melt-blown or string-wound? Both are PP, 10″–40″, 5 µm. Melt-blown works up to 60 °C with a maximum pressure drop of 3.0 bar; string-wound works up to 90 °C with 2.7 bar.
- Big Blue or standard housing? Big Blue housings are Ø148 mm with 1″ ports for fat Ø110–115 mm cartridges, 0–4.5 m³/h (10″) or 0–9 m³/h (20″). Standard housings are Ø92 mm with 1/2″–3/4″ ports, 0–1.1 or 0–2.2 m³/h.
