HFU640UY400J Replacement High Flow Filter Cartridge
Introduction:If you are sourcing HFU640UY400J replacement high flow filter cartridge for industrial RO pre-filtration and process water purification, this drop-in interchange element adopts UY-series polypropylene pleated media with 400-micron filtration rating. It delivers ultra-large effective filtration area, excellent dirt-holding capacity and high single-cartridge flow performance, effectively capturing larger suspended solids, silt, rust particles and mechanical impurities. It serves as a critical security pre-filter to protect reverse osmosis membrane systems and reduce membrane fouling risk. The special crescent-laid pleat geometry minimizes total cartridge quantity inside filter housings. As a cost-effective replacement from a Chinese manufacturer, it fits heavy-duty water-treatment projects for global EPC and industrial end-users, fully compatible with Pall Ultipleat HFU series filter vessels.
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Product Overview
HFU640UY400J belongs to the Ultipleat high flow filter series, with a 40-inch nominal length, 6-inch (152.4 mm) large outer diameter, core-less single open-end structure, and inside-to-outside flow pattern. The filter media is UY-grade polypropylene pleated material with a 400 μm removal rating. End caps and the integrated lifting handle are made of glass-fiber reinforced polypropylene material. The standard O-ring seal is EPDM, while optional silicone, Buna-N and FKM seals support various chemical working conditions. Thermal welding connection without adhesive avoids secondary contamination risk. The unique crescent-shaped laid-over pleat structure greatly expands filtration area, achieves high flow rate with fewer cartridges, and reduces filter housing investment. This interchangeable filter cartridge is widely applied in seawater desalination, power plant water systems, petrochemical process water, municipal water works and large-scale RO security filtration projects.
Working Principle
HFU640UY400J high flow filter cartridge operates in an inside-to-outside flow direction. Raw liquid enters from the inner open-end inlet and flows radially outward through the multi-layer pleated polypropylene media. Larger impurities are trapped on the inner pleated layers, while particulate contaminants are intercepted by the depth-filtration effect inside the pleated gaps. The special overlapping pleat geometry optimizes particle holding space and slows down pressure-drop rising speed. After purification, qualified liquid flows out from the outer surface of the filter media. A reliable O-ring seal prevents unfiltered fluid bypass. All intercepted pollutants remain inside the cartridge, making replacement and waste disposal safer. It acts as a security pre-filter, significantly reducing the impurity load for downstream RO, NF membrane and ion-exchange resin equipment.
Core Technical Specifications
Core Advantages
Core-less unique crescent pleat design:
Without an internal support skeleton, the special laid-over pleat geometry maximizes filtration area, achieves high flow with fewer filter cartridges, and reduces housing quantity and overall project investment.
400-micron high capacity filtration:
UY-grade polypropylene media provides reliable coarse particle interception and very high throughput performance, suitable for heavy-duty pretreatment with high solids loading.
Excellent chemical compatibility:
Full polypropylene construction has good acid-alkali tolerance and adapts to various industrial water and general process-liquid working conditions. Multiple sealing material options meet diverse corrosive fluid requirements.
Easy-maintenance single open-end structure:
The built-in lifting handle enables quick tool-free replacement; intercepted pollutants stay inside the filter element for safer handling. The thermal-welded structure eliminates adhesive pollution risk.
Economical drop-in replacement solution:
Manufactured by LEFILTER China, it matches the original dimension, interface and flow performance, helping global industrial clients and engineering contractors reduce spare-part procurement expenditure.
Main Application Scenarios
Reverse osmosis security pre-filtration for seawater desalination plants
Power plant boiler feed-water and condensate-water pretreatment
Petrochemical and fine-chemical process liquid filtration
Large-scale municipal water-supply pretreatment systems
Ion-exchange resin protection filtration for water-treatment workshops
Industrial circulating water and wastewater reuse pre-filtration
Compatibility & Cross Reference
FAQ
Q1: Can HFU640UY400J fit my existing Pall filter housing?
A1: Yes. It uses a 40-inch length, 6-inch outer diameter, core-less single open-end inside-to-outside flow structure, compatible with Pall Ultipleat HFU640 series filter vessels.
Q2: When should I replace HFU640UY400J?
A2: Replace when differential pressure rises to 2.0 bar (29 psid). Actual service life depends on raw-water impurity concentration.
Q3: What is the maximum operating temperature?
A3: Maximum continuous operating temperature is 82℃. Long-term operation above this temperature may cause polypropylene media deformation and reduce filtration efficiency.
Q4: Are other micron grades available?
A4: Yes. The UY series includes 2 μm, 4.5 μm, 6 μm, 10 μm, 20 μm, 40 μm and 70 μm. Custom specifications are available for bulk orders.
Q5: What is the production lead time for bulk orders?
A5: For standard cartridges, lead time is 7-15 working days after deposit confirmation. Custom requirements may require additional production time.
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