HFU640UY400J Water Treatment Filter Element Product Specification

Product Introduction

The HFU640UY400J is a heavy-duty polypropylene (PP) pleated filter cartridge tailored for ultra-coarse pre-filtration in large-scale industrial water treatment systems. Fabricated with high-density PP non-woven filter media and a reinforced pleated structure, this product is engineered to efficiently capture extra-large suspended solids, gravel, metal scraps and bulky organic debris from high-volume water streams. As a critical first-stage filtration component, it acts as a robust barrier to protect downstream precision equipment, such as fine filter cartridges, pumps and heat exchangers, from severe blockage and abrasion. Its ultra-large pore size and high-flow design make it a cost-effective solution for scenarios where rapid removal of large, damaging particles is the primary requirement.

Filtration Precision

The HFU640UY400J features a nominal filtration precision of 400 microns, with a particle capture rate of over 98.5% for contaminants of 400 microns and above. This ultra-coarse filtration grade is optimized for high-flow raw water treatment and wastewater pre-filtration scenarios. The uniform large-pore structure ensures minimal flow resistance, allowing high water throughput while effectively intercepting the largest and most destructive particles in the water, thus avoiding premature wear of downstream equipment.

Flux

Under standard operating conditions (25℃ ambient temperature and 0.2MPa inlet pressure), the HFU640UY400J delivers a stable water flux of 300–350 L/min. Its large-pore PP media and expanded pleated surface area minimize flow friction, enabling it to handle ultra-high water volumes without causing excessive pressure loss. This high-flux performance makes it suitable for mega-scale primary water treatment systems that require continuous and efficient operation, such as municipal raw water intake and industrial circulating water pre-filtration.

Salt Rejection Rate

As an ultra-coarse physical filtration cartridge, the HFU640UY400J has no desalination capability. Its salt rejection rate is less than 2%, which means it cannot intercept any dissolved inorganic salts, ions or small-molecule organic compounds in water. The product’s core function is strictly limited to the separation of large, insoluble particulate impurities, rather than chemical purification, salinity reduction or water softening processes.

Pressure Drop

The initial pressure drop of the HFU640UY400J is ≤0.008MPa when operating at the rated flux. During prolonged use, the pressure drop will gradually increase as large impurities accumulate on the filter surface. When the pressure drop reaches 0.1MPa, it is recommended to replace the filter cartridge promptly. Delayed replacement may lead to significant flow reduction, pipeline pressure fluctuations, or even damage to upstream pumps due to excessive resistance.

Molecular Weight Cutoff (MWCO)

The molecular weight cutoff of the HFU640UY400J is 800,000 Dalton. This parameter indicates that the filter cartridge can effectively retain macromolecular substances with a molecular weight of 800,000 Dalton and above, including large colloidal aggregates, industrial sludge clumps and bulky organic debris. Meanwhile, water molecules, dissolved minerals and small-molecule organic substances can pass through the filter media unimpeded, ensuring maximum flow efficiency and minimizing energy consumption of the water treatment system.

Membrane Thickness

The polypropylene filter membrane of the HFU640UY400J has a thickness of 0.7–0.8 mm. This thickened membrane design, combined with a reinforced inner and outer support frame, significantly enhances the mechanical strength and impact resistance of the cartridge. It enables the filter to withstand the collision and abrasion of large, hard particles such as gravel, metal scraps and rock debris in the water, effectively preventing membrane rupture or deformation during long-term operation in harsh working conditions.

Replacement Cycle

The recommended replacement cycle of the HFU640UY400J is 2–4 months, which varies depending on the actual water turbidity and impurity size of the application site. In extremely high-turbidity water systems (suspended solids content >200mg/L) with a large amount of gravel or metal scraps, the replacement cycle should be shortened to 2–3 weeks to avoid severe clogging and system failure. In low-turbidity systems (suspended solids content <25mg/L) with only small amounts of large particles, the cycle can be appropriately extended to 4–6 months with regular high-pressure backwashing maintenance.

Features

High-efficiency Ultra-coarse Filtration: 400-micron precision captures over 98.5% of large particles, providing robust protection for downstream equipment against blockage and abrasion.
Ultra-high Flow Capacity: Expanded pleated surface area and large-pore media enable a flux of 300–350 L/min, suitable for mega-scale industrial and municipal primary filtration systems.
Superior Mechanical Durability: Thickened PP membrane and reinforced support frames resist collision and abrasion from large hard particles, ensuring stable performance in harsh conditions.
Excellent Chemical Compatibility: The PP media is resistant to most acids, alkalis and organic solvents, adapting to complex industrial water quality environments such as mining and petrochemical production.
Cost-effective and Eco-friendly: High-purity PP material is economical and non-toxic; the cartridge can be recycled or disposed of in accordance with general industrial waste regulations, minimizing environmental impact.
Easy Installation and Maintenance: Standard interface design is compatible with most industrial filter housings; the cartridge can be quickly replaced without professional tools, reducing system downtime.

Application Fields

Municipal Raw Water Intake Pre-filtration: Applied in river, lake and reservoir water intake systems, removing gravel, sediment and large debris to protect subsequent coagulation, sedimentation and filtration equipment.
Mining and Mineral Processing Wastewater Treatment: Suitable for filtering mining drainage, mineral processing wastewater and tailings water, removing ore particles and rock debris to meet environmental discharge standards or enable water recycling.
Heavy Industry Circulating Water Pre-filtration: Used in steel mills, cement plants and foundries to filter circulating cooling water, removing metal scraps and large dust particles to protect heat exchangers, pumps and large-diameter pipelines.
Construction Site Wastewater Treatment: Applied in filtering foundation pit water, concrete washing water and construction drainage, removing large construction debris to meet basic discharge requirements and enable water recycling for construction.
Large-scale Agricultural Irrigation Water Filtration: Used in farmland irrigation systems and agricultural water conservancy projects, preventing nozzle blockage caused by sand and gravel in irrigation water and ensuring uniform water distribution for large-area crop planting.
Offshore Platform Ballast Water Pre-filtration: Suitable for offshore oil and gas platforms to filter ballast water, removing marine debris and sediment to protect marine equipment from corrosion and blockage.

Conclusion

The HFU640UY400J water treatment filter cartridge is a high-performance ultra-coarse filtration product that integrates ultra-high flow capacity, superior mechanical durability and cost-effectiveness. Its 400-micron filtration precision and robust PP pleated structure make it an ideal primary filtration solution for mega-scale industrial and municipal water treatment systems. As the first line of defense in water treatment processes, it effectively eliminates bulky, damaging impurities, reduces the operational burden of downstream precision equipment, extends the service life of the entire water treatment line and lowers overall maintenance costs. Whether deployed in municipal raw water intake systems, mining wastewater treatment or heavy industry circulating water pre-filtration, the HFU640UY400J delivers stable and reliable performance, creating significant economic and environmental value for users.

HFU640UY400J Heavy-Duty 400μm PP Pleated Filter Element – High-Efficiency Large-Particle Filtration for Industrial Water Treatment Systems