Bag Filtration Units

What Bag Filter Units are used for


Bag filters serve as a cost-effective method for removing suspended solids, sediments, and other particulates from raw or processed water, often as a pre-filtration step before more precise filtration systems. In the food and beverage industry, bag filters help maintain hygiene and quality by filtering out unwanted particles from liquids such as juices, sauces, syrups, and edible oils, ensuring a clean, consistent final product that meets safety and regulatory standards

FAQs

How often do I need to change or clean the bag filter?

Bag filters should typically be changed when the pressure drop across the filter reaches 10–15 psi (0.7–1 bar) or as recommended by the manufacturer. Depending on water quality and flow rate, this can range from a few days to several weeks.

Are bag filters suitable for drinking water applications?

Yes, bag filters can be used in drinking water applications, particularly as a pre-filtration step. However, they do not remove bacteria or viruses, so they are usually used before finer filtration like UV, carbon, or reverse osmosis systems.

Can I use bag filters for pre-filtration before reverse osmosis?

Absolutely. Bag filters are commonly used as pre-filters to remove larger particulates and sediment, which helps protect and extend the life of RO membranes by reducing fouling and clogging.

What micron size bag filter do I need for my application?

The right micron size depends on your water quality and the particles you want to remove:

  • large debris or coarse filtration
  • general sediment removal
  • fine particulates before RO
  • very fine filtration, ideal before sensitive processes like RO

How effective are bag filters compared to cartridge filters or membrane systems?

  • Bag filters are ideal for high flow rates and low-cost bulk filtration. They're less precise but handle larger volumes and particles.
  • Cartridge filters offer tighter filtration (down to sub-micron) and are better for more refined needs.

    Membrane systems (like RO) remove the smallest particles, including dissolved salts, bacteria, and viruses, but require pre-filtration like bag filters to function properly and avoid fouling.