Big Flow Rate Filter Cartridge for Ultrafiltration Pretreatment
Big Flow Rate Filter Cartridge is a high dirt-holding pleated filter element designed for industrial ultrafiltration pretreatment and reverse osmosis prefiltration. A liquid filterserves as the frontline protective barrier to intercept suspended impurities and reduce feedwater SDI before raw water enters UF or RO membrane modules. Our HFU640UY045H high flow filter cartridge is a mature model of this series, widely adopted for large-scale industrial water purification projects.
Product Introduction
Big Flow Rate Filter Cartridge, also commonly named high flow pleated filter cartridge, is a large-capacity pleated filter element developed for industrial ultrafiltration pretreatment, RO prefiltration and other heavy-duty liquid filtration scenarios. Distinct from traditional 20-inch small filter cartridges, this big flow rate filter adopts radial pleated polypropylene filter media, which greatly expands the effective filtration area. It achieves massive liquid throughput under low pressure drop while maintaining outstanding particle holding capacity. It is installed inside filter housings to protect ultrafiltration equipment, preventing silt, fibrous debris and coarse suspended solids from scratching and fouling the UF membrane surface.
Ultrafiltration equipment is widely used in industrial water treatment to remove colloids, bacteria and macromolecular organic contaminants. However, raw water often contains sediment and solid particles that can permanently damage expensive UF membrane modules without proper prefiltration. That makes the Big Flow Rate Filter Cartridge an indispensable safety prefilter for ultrafiltration systems. Besides HFU640UY045H, we also supply alternative models including HFU640J200H high flow filter cartridge and PFTM12UEPFC high flow filter cartridge to meet different flow rate and micron rating requirements.
This big flow rate filter cartridge features a single open end with an integrated handle, simplifying installation and replacement work. Thanks to its large flow capacity, far fewer filter cartridges are required to achieve the same liquid throughput compared with standard small cartridges. This reduces the quantity of filter housings, saves plant space and cuts down long-term maintenance labor and replacement costs. For customers looking for imported equivalent replacements, we provide Pentair ALN05-60B Filter Cartridge and Pentair AL-6-60B Filter Cartridge as interchangeable options for ultrafiltration pretreatment.
Numerous seawater desalination, power plant condensate reuse and industrial wastewater recovery projects combine big flow rate filter cartridges with ultrafiltration systems. The big flow filter removes most particulate impurities in raw water, creating stable inlet water conditions for downstream ultrafiltration membranes. This extends UF module service life and reduces the frequency of chemical cleaning, lowering the overall operating expenditure of the whole water treatment plant.

Working Principle
The filtration system equipped with Big Flow Rate Filter Cartridge works together with ultrafiltration equipment in two sequential purification stages: cartridge prefiltration and ultrafiltration separation.
At the prefiltration stage, raw liquid flows from the outer side of the pleated filter media and flows inward through the filter layer. The Big Flow Rate Filter Cartridge uses gradient pleated polypropylene material. The outer coarse layer traps large sediment, plankton and fibrous debris, while the inner fine layer captures tiny suspended solids and fine colloidal particles. This gradient pore design prevents rapid surface clogging, improves dirt holding capacity and keeps pressure drop stable during long continuous operation cycles.
After prefiltration by the big flow rate filter cartridge, water with reduced turbidity and SDI enters the ultrafiltration equipment. The ultrafiltration membrane intercepts fine colloids, microorganisms and macromolecular organic matter that cannot be fully captured by the big flow filter cartridge. The clarified water from ultrafiltration can be further sent to reverse osmosis membrane elements for desalination and deep purification.
Without this prefiltration protection, solid particles will abrade the UF membrane surface and trigger irreversible fouling. Once permanent contamination occurs, the permeate flux of ultrafiltration membrane will drop significantly, forcing users to replace costly UF modules ahead of schedule. Therefore, selecting suitable big flow rate filter cartridges is the most economical way to safeguard ultrafiltration systems. For different project needs, customers can also select Pall HFU 660GFO20H Ultipleat filter or Replace Parker High Flow Water Filter for UF Pretreatment System as safety prefilters.
Technical Parameters
| Item | Specification |
|---|
| Product Name | Big Flow Rate Filter Cartridge |
| Filter Media | Pleated Polypropylene |
| Standard Length | 40 / 60 inch |
| Filtration Rating | 1μm,5μm,10μm,20μm |
| End Cap Style | Single Open End with Handle |
| Max Operating Temperature | 82℃ |
| Max Differential Pressure | 3.4 bar |
| Material Feature | Thermally bonded, no adhesive |
| Main Application | Ultrafiltration pretreatment, RO prefiltration |
Big Flow Rate Filter Cartridge can be fitted into standard large-flow filter housings. When you need replacement filter elements for existing filter vessels, we also provide PFTM11UNPFA high flow filter cartridge to match different brand filter housings without modification.
Quality Assurance
All of our Big Flow Rate Filter Cartridge are manufactured under ISO 9001 quality management system. Every batch of polypropylene filter media is inspected before production. Each finished filter cartridge undergoes bubble point test, pressure resistance test and dirt holding capacity test to guarantee stable filtration performance.
We adopt thermally bonded polypropylene material, no glue is used inside the filter element, which eliminates liquid contamination risk caused by adhesive dissolution. The filter end cap and pleated media are tightly fused together to avoid liquid bypass leakage. If bypass happens, unfiltered particles will pass through the filter directly and damage the downstream ultrafiltration membrane.
Our factory supports custom service for special micron rating, length and material of big flow rate filter cartridges. Whether you need standard replacement elements or customized filter cartridges for special chemical liquid conditions, we can provide stable and cost-effective filter products for ultrafiltration pretreatment projects.

Application Fields
Big Flow Rate Filter Cartridge is widely used in industrial water treatment scenarios requiring ultrafiltration pretreatment:
Seawater desalination ultrafiltration pretreatment system
Power plant condensate water filtration and reuse
Industrial wastewater recycling and ultrafiltration pre-treatment
Food and beverage liquid purification
Municipal water supply ultrafiltration treatment
For all these applications, big flow rate filter cartridges serve as the key prefilter to safeguard ultrafiltration equipment. Our full range of filter elements including HFU series, PFTM series and Pentair replacement cartridges can be matched with different-capacity ultrafiltration and RO systems.
The selection of big flow rate filter cartridges depends on raw water turbidity, flow rate and the design of ultrafiltration system. Higher filtration precision will reduce the maximum flow rate, so we balance flow capacity and particle retention efficiency for each water treatment project. Our HFU and PFTM series filter cartridges follow the same technical specifications and can directly replace original imported filter elements without modifying existing filter housings.
FAQ
Q1: What is Big Flow Rate Filter Cartridge mainly used for?
A1: Big Flow Rate Filter Cartridge is a pleated large-flow filter element, mainly used as prefilter for ultrafiltration equipment and RO prefiltration. It intercepts suspended solids, reduces feed water SDI and protects UF membrane modules.
Q2: What advantages does Big Flow Rate Filter Cartridge have over conventional small filter cartridges?
A2: It has larger effective filtration area, higher flow rate and greater dirt holding capacity. Fewer filter elements and housings are required, saving installation space and lowering filter replacement frequency for ultrafiltration systems.
Q3: Can your Big Flow Rate Filter Cartridge replace Pall HFU and Pentair AL series filter elements?
A3: Yes. Our big flow rate filter cartridges are direct interchangeable replacements. We also supply Pall HFU 660GFO20H Ultipleat filter alternative elements that fit standard filter housings with no modification required.
Q4: When should I replace the Big Flow Rate Filter Cartridge?
A4: Replacement cycle depends on raw water quality. Normally, replace the cartridge once the pressure drop across the filter housing reaches 2.5 ~ 3 bar. Typical service life ranges from 1 to 4 months.
Q5: Can Big Flow Rate Filter Cartridge work with ultrafiltration equipment for seawater desalination?
A5: Absolutely yes. It is one of the most popular prefilter elements for seawater ultrafiltration pretreatment. It removes sediment and marine debris to protect the downstream UF membrane.
Q6: Are custom specifications available for Big Flow Rate Filter Cartridge?
A6: Yes. We can customize micron rating, length and filter media material for special chemical liquid and water treatment working conditions, compatible with ultrafiltration and RO pretreatment systems.
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