Polyester Liquid Filter Bags
Liquid Polyester Filter Bags are high-strength, multi-layer felt filter bags engineered for liquid filtration applications requiring excellent mechanical strength, broad chemical compatibility, and stable performance up to 135–160°C.
These filter bags are ideal for:
Key selection criteria:
Compatible Industries: Chemical processing, automotive fluids, metals finishing, food & beverage, coatings, general manufacturing.
Polyester felt provides stable filtration in liquid systems operating at 120–135 °C continuous with short peaks up to 150–160 °C, maintaining structure and efficiency without excessive thermal shrinkage.
Multi-layer needle-punched polyester felt delivers excellent mechanical strength and dimensional stability under pump pulsation, start-stop cycles, and high-flow conditions, reducing bag deformation and bypass risk.
Liquid Polyester Filter Bags offer broad chemical resistance to weak acids, many organic solvents, and a moderate level of alkalinity, making them suitable for water treatment, chemicals, coatings, and general industrial liquids.
Available in a wide 0.5–300 µm micron range, polyester bags can handle everything from fine pigments and organics to coarse particulates, providing large dirt-holding capacity and long run time between change-outs.
In mid-temperature and mechanically demanding liquid systems, Liquid Polyester Filter Bags typically achieve 2–6× longer service life than polypropylene bags, reducing replacement frequency, downtime, and total filtration cost.
| Filter bag size | Diameter | Length | Maximum flow rate(m³/h) | Filter area(㎡) | Volume (L) |
|---|---|---|---|---|---|
| 01# | 7″(180mm) | 17″(450mm) | 20 | 0.25 | 8 |
| 02# | 7″(180mm) | 32″(810mm) | 40 | 0.5 | 17 |
| 03# | 4″(108mm) | 9″(230mm) | 6 | 0.09 | 1.3 |
| 04# | 4″(108mm) | 15″(380mm) | 12 | 0.16 | 2.5 |
| 05# | 6″(152mm) | 20″(520mm) | 12 | 0.18 | 8 |
Liquid Polyester Filter Bags are engineered for medium-temperature liquid filtration where high mechanical strength, broad chemical compatibility and stable performance up to 120–135 °C (peaks 150–160 °C) are required. Their multi-layer needle-punched felt construction delivers high dirt-holding capacity, low fibre shedding, and reliable separation performance across water, chemicals, oils, emulsions and process liquids.
Used as pre-filters and guard filters in cooling water, process water and industrial wastewater. Polyester liquid filter bags efficiently remove rust, scale, sand and suspended solids, protect RO/UF membranes and downstream cartridges, and help maintain stable turbidity and SDI values.
Suitable for acids, solvents, process chemicals and polymer solutions where good solvent resistance and dimensional stability are required. Polyester bags protect pumps, heat exchangers, reactors and storage tanks, reduce particle-related fouling and support predictable maintenance cycles.
Widely used in paints, inks, resins, adhesives and emulsions to remove gels, agglomerates and oversized pigments. Liquid Polyester Filter Bags help prevent nozzle plugging, streaks and surface defects, while maintaining colour consistency and viscosity in high-value formulated products.
Choosing the right filtration supplier affects everything from system stability to maintenance downtime. At Omela Filtration, we combine reliable materials, controlled production, and years of industry experience to support dust and liquid filtration needs across different plants and applications.
We use consistent-grade filter media, sewing thread and metals sourced from qualified suppliers. Each batch is checked for weight, thickness, air permeability and tensile strength to keep performance steady across shipments.
Our facility is equipped with modern sewing lines, hot-welding machines and automated inspection tools. This keeps production efficient and helps us meet tight delivery schedules, even on custom orders.
Our engineers and technicians have long experience with dust collectors, liquid systems and industry-specific conditions. They help you match materials to temperature, chemistry and air-to-cloth ratios to avoid unnecessary failures.
From sampling to documentation and shipping, our team responds quickly and keeps information clear. Customers in cement, asphalt, power and water-treatment plants rely on our service to resolve problems without delay.
From the first technical discussion to installation and long-term maintenance, our team stays involved at every stage. We analyze your operating conditions, adjust product designs when needed, and ensure the final filtration setup works reliably in real plant environments. After delivery, our service team continues to provide guidance and troubleshooting support, helping you keep your system stable and downtime low.
With 20+ years of engineering expertise and 1000+ global clients across water treatment, chemicals, coatings, food & beverage, and industrial process filtration, Omela delivers reliable liquid-filtration performance, extended bag life, and stable system operation under demanding conditions.
