RCP900-40EPP Water Treatment Filter Cartridge Technical Specification

Product Introduction

The RCP900-40EPP is a high-flow enhanced polypropylene (EPP) water filter cartridge, a core product of the RCP900 series engineered for industrial and commercial high-throughput water treatment pre-filtration and fine filtration. Adopting modified food-grade EPP raw materials and advanced three-dimensional gradient melt-blown forming technology, it features a 40EPP enhanced core structure that balances ultra-high flux, 4-micron precision filtration and super high dirt-holding capacity. Free of adhesives, heavy metals and organic leachables, the cartridge complies with FDA and NSF international water treatment material safety standards, with no secondary pollution to water bodies. It is specially designed to intercept suspended solids, 4-micron fine particulates, colloids and large macromolecular impurities in water, providing reliable front-end protection for subsequent precision filtration equipment such as RO/NF membranes, ultrafiltration membranes and precision water pumps, and ensuring the stable, efficient and energy-saving operation of large-flow water treatment systems in complex water quality conditions.

Filtration Precision

The RCP900-40EPP is designed with a graded high-precision three-dimensional filtration structure, with a nominal filtration precision of 4 microns and an absolute filtration precision of 8 microns. Its gradient pore structure is composed of a dense surface interception layer, a transition impurity storage layer and a porous mechanical support layer, which can realize step-by-step capture of impurities with particle sizes from 4 microns to tens of microns in water. The dense surface layer effectively blocks fine particulates that cause fouling and clogging of subsequent precision membrane elements, while the inner gradient layer can store a large amount of intercepted impurities to avoid rapid blockage of the cartridge. This structural design ensures that the filtration precision remains stable and unattenuated throughout the entire service cycle, even under 24-hour continuous high-flow working conditions.

Flux

Under the standard operating conditions (25℃ ambient temperature, 0.25MPa inlet pressure, pure water medium), the pure water flux of the RCP900-40EPP reaches 900 L/h (liters per hour), the core high-flow advantage of this product. Within the recommended operating pressure range of 0.15-0.35MPa, the flux maintains high stability with a variation rate of less than 8%; when the water temperature is in the range of 10-40℃, the flux changes linearly with temperature rise and fall, and the flux recovery rate is 100% after the temperature returns to the standard value. For actual raw water with turbidity ≤10 NTU (the recommended working turbidity), the actual operating flux can still maintain more than 820 L/h, fully meeting the large-flow water supply and purification requirements of various industrial and commercial water treatment systems.

Salt Rejection Rate

As a high-flow enhanced EPP particulate filtration cartridge, the RCP900-40EPP is optimized for the physical interception of non-ionic salt contaminants, colloidal salt particles and insoluble salt precipitates, with a salt rejection rate of ≥99% for insoluble salt particulates and colloidal salt with particle size above 4 microns. For soluble inorganic salts, it serves as a professional pre-filtration component for desalination systems such as RO and NF, which can effectively reduce the particulate salt load in the feed water of subsequent desalination membrane elements, avoid salt scaling and particulate fouling on the membrane surface, and thus improve the overall salt rejection efficiency and extend the service life of the entire desalination system. In addition, the cartridge can intercept more than 98% of macromolecular organic salts and salt-containing colloids in water, further optimizing the feed water quality for subsequent precision water treatment systems.

Pressure Drop

Under the rated flux (900 L/h) and standard operating conditions, the initial pressure drop of the RCP900-40EPP is ≤0.012MPa, which is lower than that of the same series 2-micron precision products and conventional PP filter cartridges of the same precision, realizing ultra-low energy consumption operation of high-flow water treatment systems. With the progress of filtration work and the gradual accumulation of intercepted impurities, the pressure drop of the cartridge rises slowly and stably; the recommended maximum allowable operating pressure drop is 0.1MPa. When the pressure drop reaches this threshold, the cartridge needs to be cleaned or replaced in time to avoid excessive pressure loss leading to reduced system water supply flow, increased water pump energy consumption and even structural damage to the cartridge caused by overpressure.

Molecular Weight Cutoff (MWCO)

The molecular weight cutoff of the RCP900-40EPP is precisely calibrated to 120,000 Daltons (Da), which is perfectly matched with its 4-micron filtration precision and enhanced EPP material gradient pore structure. This MWCO rating can effectively retain macromolecular organic matter, colloidal particles, macromolecular impurities and organic polymers with molecular weight higher than 120,000 Da in water, while ensuring the unimpeded passage of water molecules, small-molecular inorganic substances and trace beneficial ions. It is specially designed for the pre-filtration requirements of large-flow medium-high precision water treatment systems, and can effectively reduce the macromolecular contaminant load of subsequent precision membrane elements, avoiding membrane fouling and improving the overall operation efficiency of the system.

Membrane Thickness

The RCP900-40EPP adopts a three-layer composite enhanced polypropylene membrane structure with a total effective membrane thickness of 32mm, which is thicker than conventional PP filter cartridges and the same series 2-micron products, greatly improving the dirt-holding capacity and mechanical strength of the cartridge. The surface filtration layer (7mm) is a dense enhanced EPP membrane, responsible for high-precision interception of 4-8 micron fine particulates, with excellent wear resistance and anti-blocking performance; the middle transition support layer (18mm) is a three-dimensional gradient pore EPP membrane, undertaking secondary interception of impurities and providing strong structural support for the surface layer, which is the main dirt-holding area of the cartridge; the bottom base layer (7mm) is a high-density EPP membrane, enhancing the overall pressure resistance, extrusion resistance and impact resistance of the cartridge. This scientific three-layer thickness distribution balances high filtration efficiency, super dirt-holding capacity and high mechanical strength, making the cartridge resistant to deformation and rupture under long-term high-pressure and high-flow working conditions.

Replacement Cycle

The recommended standard replacement cycle of the RCP900-40EPP is 5-8 months, formulated based on the standard working conditions: raw water turbidity ≤10 NTU, suspended solids content ≤20 mg/L, and 24-hour continuous system operation. For water treatment systems with harsh water quality conditions (turbidity >10 NTU, suspended solids content >20 mg/L) such as industrial raw water, municipal sewage reclaimed water and groundwater, the replacement cycle is shortened to 3-5 months according to the actual system pressure drop and water quality test results; for low-turbidity high-quality raw water pre-filtration scenarios (turbidity ≤3 NTU) such as pure water, mineral water production and commercial central water supply, with regular gas-water backwashing and professional online maintenance, the replacement cycle can be appropriately extended to 8-10 months, effectively reducing the system’s daily use and maintenance costs.

Features

High-Grade Modified EPP Raw Material: Adopts food-grade modified enhanced polypropylene material with higher density, tensile strength and chemical stability than conventional PP, acid and alkali resistant (pH 1-14), corrosion resistant to most industrial water chemicals, and adaptable to various complex industrial and commercial water quality conditions.
3D Gradient Melt-Blown Pore Structure: Three-dimensional gradient pore design realizes step-by-step interception of impurities with different particle sizes, super high dirt-holding capacity, ultra-slow pressure drop rise, and stable filtration performance under long-term 24-hour high-flow operation.
Ultra-Low Initial Pressure Drop: Optimized pore size distribution and membrane thickness design result in an initial pressure drop of ≤0.012MPa, significantly reducing water pump energy consumption and achieving ultra-energy-saving operation of large-flow water treatment systems.
Adhesive-Free Integrated Hot-Melt Forming: Advanced one-piece hot-melt welding forming technology, no seams, no filter bypass and no dead angles, avoiding unfiltered water leakage and ensuring the purity and stability of filtered water quality.
Super High Pressure & Impact Resistance: 32mm thick composite EPP membrane structure can withstand a maximum operating pressure of 0.7MPa, no deformation, no rupture and no delamination under high-pressure and high-flow impact, with excellent structural stability and long service life.
Efficient Backwash Recoverable Performance: For slight to moderate blockage, the filtration performance can be quickly recovered by gas-water mixed backwashing, reusable for multiple times, greatly reducing the replacement frequency and overall use cost of the cartridge.
Standard Universal Interface Design: RCP900 series standard structural design, matching universal large-flow industrial filter housings (304/316L stainless steel/plastic), no special installation tools required, quick disassembly and assembly, and convenient on-site maintenance and replacement.
Food-Grade Safety & Environmental Protection: Free of adhesives, heavy metals, phthalates and other harmful substances, fully compliant with FDA/NSF international food-grade standards, no chemical leaching in long-term contact with water; the spent cartridge can be recycled as PP plastic, meeting national environmental protection recycling requirements.
Wide Temperature Adaptability: Can work stably in the water temperature range of 0-65℃, suitable for water treatment systems with slight temperature changes in industrial production, commercial water supply and municipal water treatment scenarios.

Application Fields

Large-Flow Industrial Process Water Pre-Filtration: Chemical, petrochemical, metallurgy, papermaking, printing and dyeing and electric power industries’ process water, cooling water, circulating water and boiler make-up water pre-filtration, removing fine particulates and colloids to protect subsequent precision heat exchangers, RO/NF membranes and precision valve equipment.
Commercial Central Water Supply Systems: Large shopping malls, high-end hotels, office buildings, hospitals, universities, large residential communities and commercial plazas’ central water supply fine filtration, meeting large-flow domestic and service water demand and improving the safety and quality of tap water.
Industrial RO/NF Desalination System Pre-Filtration: Special pre-filtration for large-flow industrial reverse osmosis and nanofiltration desalination systems (seawater desalination, brackish water desalination), reducing the particulate and macromolecular contaminant load of membrane elements, and extending the service life of RO/NF membranes by more than 40%.
Food & Beverage Industry Water Treatment: Large-scale beverage, dairy, beer, wine, condiment and food processing industries’ production water, pure water and mineral water pre-filtration and fine filtration, meeting FDA/NSF food-grade water quality requirements and ensuring the safety of food and beverage products.
Municipal Sewage Advanced Treatment & Reclaimed Water Reuse: Municipal sewage secondary treatment effluent advanced filtration, reclaimed water reuse for industrial cooling, urban greening, road cleaning, toilet flushing and landscape water, removing suspended solids and colloids to improve the quality of reclaimed water.
Water Plant & Municipal Water Treatment: Urban tap water plants, rural centralized water supply systems and water supply companies’ raw water pre-filtration and fine filtration, reducing raw water turbidity and suspended solids content, lightening the load of subsequent water treatment processes and improving the quality of finished tap water.
Groundwater & Surface Water Purification: Large-scale groundwater extraction and surface water (river water, lake water) purification treatment, removing particulate impurities, colloids and suspended solids in water, suitable for rural centralized water supply and industrial raw water extraction scenarios.
Aquaculture & Aquatic Product Processing: Large-scale marine and freshwater aquaculture circulating water systems, aquatic product processing production water and cleaning water filtration, removing particulate impurities, residual bait and excrement to optimize the aquaculture water environment and improve the quality of aquatic products.
Car Washing & Commercial Water Reuse: Large-scale commercial car washing centers, industrial washing and cleaning industries’ water circulation and reuse systems, removing particulates in waste water to realize water resource recycling and reduce water consumption costs.

Conclusion

The RCP900-40EPP is a high-performance, high-cost-efficiency enhanced polypropylene filter cartridge specially developed for large-flow industrial and commercial water treatment scenarios, which integrates the core advantages of 4-micron medium-high precision filtration, 900 L/h ultra-high flux, ultra-low energy consumption, super dirt-holding capacity and long service life. Based on modified food-grade EPP raw materials and advanced three-dimensional gradient melt-blown technology, the product has excellent mechanical strength, chemical corrosion resistance and pressure resistance, and can maintain stable and efficient filtration performance under complex water quality and 24-hour continuous high-flow operation conditions. Its ultra-low initial pressure drop design effectively reduces the energy consumption of large-flow water treatment systems, and the efficient backwash recoverable performance greatly lowers the daily use and maintenance costs of the system. Fully compliant with FDA/NSF international food-grade safety standards, with a standard universal interface and easy installation and maintenance, the RCP900-40EPP can be widely applied to pre-filtration and fine filtration of various large-flow water treatment systems, providing reliable and long-term front-end protection for subsequent precision filtration equipment, optimizing the overall operation efficiency of the system, and reducing the failure rate and maintenance cost of subsequent equipment. As a professional high-flow water treatment filter cartridge with excellent comprehensive performance, the RCP900-20EPP is a reliable and cost-effective choice for industrial and commercial customers to solve large-flow water purification and pre-filtration problems, and can create significant economic and environmental benefits for the safe, stable, energy-saving and efficient operation of water treatment systems.

Related products

RCP900-20EPP: High-precision version of the same series, 2 micron nominal filtration precision, 900 L/h flux, suitable for high-precision pre-filtration of electronic, pharmaceutical and biotech industries with strict water quality requirements.
RCP900-50EPP: High dirt-holding version of the same series, 5 micron nominal filtration precision, 950 L/h flux, thicker membrane structure, suitable for pre-filtration of industrial raw water and municipal sewage with poor water quality.
RCP900-40EPP-S: Sanitary grade enhanced version, food-grade ultra-smooth EPP membrane, no dead angle structural design, suitable for pharmaceutical, food and beverage industries with high sanitary requirements for water treatment.
RCP900 Series Stainless Steel Filter Housing: Special matching large-flow filter housing for RCP900 series cartridges, 304/316L food-grade stainless steel material, single-core/multi-core models optional, with pressure gauge and automatic blowdown valve, suitable for various industrial and commercial installation scenarios.
RCP900-40EPP-M: Anti-scaling modified version, nano anti-scaling functional additives added in the membrane layer, suitable for high-hardness, easy-scaling industrial water, groundwater and boiler make-up water large-flow treatment systems.
RCP600-40EPP: Medium-flow version of the same precision, 600 L/h flux, RCP600 series interface, suitable for medium-flow industrial and commercial water treatment systems with the same 4-micron precision requirements.
RCP900 Backwashing System Kit: Special online automatic gas-water backwashing device for RCP900 series high-flow cartridges, realizing intelligent backwashing without disassembly, improving the cartridge reuse rate by more than 60%.
RCP900-40EPP-C: Activated carbon composite version, integrated EPP precision filtration and high-quality activated carbon adsorption, removing both particulates and organic matter/chlorine/odors in water, suitable for commercial central water supply and food and beverage industry water treatment.
RCP900-40EPP-F: Anti-fouling modified version, added with anti-fouling functional coating on the membrane surface, anti-bacterial and anti-colloid adhesion, suitable for water treatment systems with high colloid content in raw water.
RCP900 Series Filter Cartridge Test Kit: Special on-site test kit for RCP900 series cartridges, including pressure drop detector, turbidity meter and filtration precision test paper, convenient for on-site detection of cartridge performance and replacement judgment.

RCP900-40EPP High-Flow Enhanced Polypropylene Filter Cartridge 4 Micron Precision for Industrial Commercial Water Treatment Pre-Filtration