NINGCHUANWATER TREATMENT EQUIPMENT ☰

Bag filters and cartridge filters both remove solids from liquids, but they suit different jobs. Picking the wrong one means higher consumable cost or change-outs that take too long. Here is how to decide.

How they work

A bag filter housing holds a fabric filter bag. Liquid enters, solids are caught in the bag, and only the bag is replaced at each service. A cartridge filter housing (also called a precision filter) holds pleated or melt-blown cartridges - these are the final security barrier just ahead of RO membranes.

Choose a bag filter when

• Flow is high (roughly above 60-80 m3/h) or dirt load is large.
• You want the lowest cost per cubic metre, because only a bag is discarded.
• The application is viscous (paints, syrups, oils) or coarse-to-medium filtration.

Choose a cartridge filter when

• You need fine, consistent removal (0.1-20 micron) as RO pre-filtration.
• Space is limited and flow is moderate - a compact vessel with a few cartridges.
• You want to swap media type (melt-blown, pleated, string-wound) without changing the housing.

Cost and maintenance

Bag housings shine on high-volume, high-dirt duty: fewer change-outs, less downtime. Cartridge housings shine on precision duty: smaller, finer, and ideal as the guard before membranes. Many plants run both - bag filtration first for bulk solids, then cartridge filtration for the final polish.

Explore our stainless steel bag filter housings, precision (cartridge) filter housings and filter bags, or read the full bag filter housing manufacturer guide.

Tell us your flow rate, liquid and particle-size target and we will recommend the right vessel and rating.

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