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Liquid Filter Bags

Polyester Felt Filter Bags


Needled Felt Liquid Bags

Needled Felt Filter Bags, Polyester Liquid Bags

Needled Felt Filter Bag is the most common and economical filter element. These filter bags contain fibers locked together as they pass through beds of special barbed needles, entangling them into a felt media on the inner surface of the filter bag. The outer surface is singed through a special heat process, eliminating the possibility of fiber migration. This rugged media is ideal for fabrication by both sewing and welding. Available in a wide range of materials, needle felt filter bags can be used in a wide range of processes involving liquids of low to medium viscosity.

The strong needled felt filter bags are suitable for the removal of hard particles from a process stream. Heading Filter provides needled felt bags in PO, PE, NOMEX and PTFE in the full range of bag sizes.


• Needling and heat singeing lock fibers into the media.

• Fully welded construction, preventing fluid bypass.

• Effective on both low and medium viscosity liquids.

• Removes hard particles even at high flow rates.

• NT and PTFE available for high temperature or aggressive fluid applications.

• Seal options include both plastic rings and economical stainless steel.

How To Order

Example: Pp-10-P02B represents needled felt filter bag, micron rating of 10um, with no cover, size 2 filter bag and NBR seal ring


Micron Rating

Cover Layer


Seal Ring

PP - Polypropylene 

PE - Polyester

NT - Meta-Aramid

1 / 5 / 10/25/50/100/200 um

P - Plain

01 - No.1

02 - No.2

03 - No.3

04 - No.4

B - Beato Ring

E - E Type Ring

F - F Type Ring

S - Stainless Steel

Technical Date

Filter Area (m2)

Diameter (mm)

Length (mm)

Recommended Flow Rate (m3/ h)


0.24 m2

178 mm

420 mm



0.48 m2

178 mm

810 mm



0.08 m2

102 mm

230 mm



0.16 m2

102 mm

410 mm


Temperature Resistance

Chemical Compatibility


< 90℃

S.Acid / W.Acid / W.Alkali / S.Alkali


< 140

W.Acid / Solvent


< 220

W.Acid / W.Alkali / S.Alkali / Solvent


< 240

S.Acid / W.Acid / W.Alkali / S.Alkali / Solvent

Typical Application

1 Syrup Production & Filtration

2 Recycled Water Systems

3 Lubricating Oil Production & Filtration

4 Electrophoretic Paint & Plating Solution

5 Amine Desulphurization & Filtration

6 Gum Resin & Solvent

7 Chemical Processes

8 Powder Production and Filtration

Related Applications

Inks Filtraion

Automobile Painting Application

Generic Polypropylene Manufacturing

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