Filter bags & filter socks

Our bag filtration systems are widely used for the reduction of sediment from industrial and food applications due to their high flow rate capability, easy maintenance, and rugged design. Siga Filtration can offer filter bags for general particulate removal and high-efficiency removal of particulates. For high flow rate applications, Siga Filtration can offer multi-bag filter housings that can handle flow rates of up to 400 m3/h. All standard filter bags are supplied with integrated handles for easy removal from filter housings. Filter bags are available with removal ratings from 0.5 – 1800 µm.


Know which filter bag to use? Skip to our filter bag product pages.


Filter bag material selection
Siga Filtration can supply filter socks in Polypropylene felt, Polyester felt, and Nylon mesh. Polypropylene felt has wide chemical compatibility and is suitable for most industrial, water and chemical applications up to an operating temperature of 80°C.
Polyester felt filter socks have a high-temperature resistance (up to 120°C with SS or Polyester ring). These filter bags also provide excellent resistance against hydrocarbons and are a material of choice for the filtration and polishing of gasoline, diesel, biodiesel, and other fuels.
Both Polyester and Polypropylene felt filter bags provide clarification of particles. These filter bags also provide removal of gelatinous or deformable particles due to the depth of the filter medium.
Nylon monofilament mesh filter bags remove particles by sieving and are used for the classification of particles.
Filter bag temperature ratings
Polypropylene felt 80°C
Polyester felt 120°C
Nylon monofilament mesh 90°C
* Temperature ratings depend on application and process fluid
Filter bags sizes
Our filter socks are available in the following industry-standard sizes:
Bag Size 1 – 7” x 16” approx. with a moulded plastic collar, stainless steel ring, drawstring or no collar
Bag Size 2 – 7” x 32” approx. with a moulded plastic collar, stainless steel ring, drawstring or no collar
Bag Size 3 – 4” x 8.8” approx. with a moulded plastic collar, stainless steel ring, drawstring or no collar
Bag size 4 – 4” x 15” approx. with a moulded plastic collar, stainless steel ring, drawstring or no collar
Custom size – These filter bags can be manufactured to customer specifications and sizes.


Filter bag flow rates
Our filter bags provide a high flow rate capability combined with excellent dirt holding capacity. Flow rates depend on many factors like application, particulate concentration, micron rating, and viscosity. A general guide to flow rates is provided below for water with 10 micron felt type filter bag.
Size 1 bags – 20 m3/h
Size 2 bags – 40 m3/h
Size 3 bags – 6 m3/h
Size 4 bags – 12 m3/h
Filter bag applications
Siga filtration can supply filter bags for the following applications and many more:
Automotive – Filtration of paints, parts washing and cutting fluids
Chemical – Filtration of acids, alkalis, solvents
Food & beverage – Beer, edible oils, syrups, honey, kombucha, water
Metalworking – Filtration of cutting fluids and parts cleaning fluids
Paint – Removal of agglomerates, particulates
Resins, inks, coatings – Dispersions, ink, resins
Water – Sediment removal, carbon fines, resin fines
HVAC – Removal of sediment, rust, and suspended calcium deposits from LTHW, CHW circuits
Food grade filter bags
Our BREWBag filter bags are constructed from food-grade materials and provide an excellent particulate reduction solution for various production stages in the food & beverage industry. These filter bags are available in micron ratings from 0.5 – 1800 µm.
Custom sizes
In addition to standard sizes, we can supply filter bags in customer specified lengths and diameters.
Extended life and high-efficiency filter bags
Extended life filter bags feature a thicker media for increased particle retention and filter life. These are ideal for applications where longer filter life is required to reduce maintenance demand. Our high-efficiency filter socks can provide greater than 99% removal of particulates in applications that require an extremely low particulate count.
Filter bag micron ratings
Polypropylene & Polyester felt filter socks – 0.5, 1, 5, 10, 25, 50, 100, 200 µm
Nylon monofilament mesh filter socks – 1, 5, 10, 25, 50, 75, 100, 125, 150, 200, 250, 300, 400, 500, 600, 800, 1000, 1200, 1800 µm
Filter bag chemical compatibility
Our standard filter bags provide broad chemical compatibility in industrial and chemical applications.
Polypropylene felt bags – Acids, alkalis, organic solvents, alcohols, oxidisers
Polyester felt bags – Hydrocarbons, alcohols, acids, solvents
Nylon monofilament mesh bags – Solvents
* Chemical resistance depends on operating temperature, process fluid, and application. The material should be soak tested prior to use. 

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