Polyester Felt Liquid Filter Bag
The polyester felt liquid filter bag uses needled depth media to hold more solids across the media thickness while maintaining steady flow. It is a strong general-purpose option for water-based liquids, oils, slurries, and higher-temperature service where capacity matters more than precise surface cut-off.
Build Your Configuration
Full Spec Sheet
| Fiber Type | Needled polyester felt |
| Filtration Mechanism | Depth loading through media thickness |
| Surface Finish | Glazed for low fiber migration |
| Micron Range | 1 μm - 200 μm |
| Dirt Capacity | Higher than mesh bags in slurry service |
| Typical Fluids | Water, oils, coolants, resins |
Dimensions & Flow Rates
| Size | Diameter | Length | Max Flow | Max dP |
|---|---|---|---|---|
| #1 | 180 mm (7 in) | 410 mm (16 in) | 80 L/min | 4.5 bar |
| #2 | 180 mm (7 in) | 810 mm (32 in) | 160 L/min | 4.5 bar |
| #3 | 105 mm (4 in) | 230 mm (9 in) | 25 L/min | 4.5 bar |
| #4 | 105 mm (4 in) | 380 mm (15 in) | 45 L/min | 4.5 bar |
| #5 | 150 mm (6 in) | 560 mm (22 in) | Contact us | 4.5 bar |
Flow rates are guidelines at 1 bar differential pressure with water at 20 C. Actual capacity varies with viscosity, micron rating, and particle load.
How It Is Built
Needled felt depth media
Polyester staple fibers are needled into a stable felt structure that traps solids throughout the media depth rather than only at the surface.
Migration-controlled finish
The felt surface is heat-set and singed to reduce loose fibers and support cleaner downstream performance.
Multiple seam options
Sewn and welded constructions are available based on the cleanliness, pressure, and compatibility targets of the application.
Versatile support hardware
The bag can be paired with PP rings, stainless rings, or drawstring closures to match common bag filter housings.
Industries & Use Cases
Water Treatment
- *Clarification duty
- *Side-stream solids removal
- *Cooling water polishing
- *Wastewater solids capture
Paint & Coatings
- *Pigment retention
- *Resin slurry cleanup
- *Batch transfer polishing
- *Packaging line filtration
Food Processing
- *Edible oil polishing
- *Sugar and syrup filtration
- *Process water cleanup
- *Utility liquid conditioning
General Industry
- *Machine coolant cleanup
- *Ceramic slurry filtration
- *Lubricant polishing
- *Chemical transfer filtration
MADE TO YOUR SPECIFICATION
Customize micron rating, dimensions, ring style, seam construction, and other details. MOQ starts from 100 pcs per SKU.
Submit Your Specification ->Documentation
Felt media provides depth filtration and holds more solids before change-out, making it better for turbid liquids and higher contaminant loading.
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or Sample
Describe your application, flow rate, and micron target. Our technical team responds within one business day with a recommendation and pricing.