RCP900-20EPP Water Treatment Filter Cartridge Technical Specification

Product Introduction

The RCP900-20EPP is a high-performance enhanced polypropylene (EPP) water filter cartridge, engineered exclusively for high-flow industrial and commercial water treatment pre-filtration and fine filtration applications. As a core product of the RCP900 series, it adopts advanced modified EPP raw materials and three-dimensional gradient melt-blown forming technology, optimized with a 20EPP enhanced core structure to achieve the perfect balance of ultra-high flux, high filtration precision and super dirt-holding capacity. Free of adhesives, heavy metals and organic leachables, the cartridge complies with FDA and NSF international food-grade and industrial water treatment material safety standards. It is specially designed to intercept suspended solids, 2-micron fine particulates, colloids and 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 and efficient operation of the entire water treatment system without secondary water pollution.

Filtration Precision

The RCP900-20EPP features a graded high-precision filtration structure with a nominal filtration precision of 2 microns and an absolute filtration precision of 5 microns. Its three-dimensional gradient pore design consists 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 2 microns to tens of microns in water. The dense surface layer effectively blocks fine particulates that are easy to cause fouling and clogging of subsequent precision membranes, while the inner gradient layer stores a large amount of intercepted impurities, avoiding rapid blockage of the cartridge. This design ensures that the filtration precision remains stable and unattenuated throughout the 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 RCP900-20EPP 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 remains stable with a variation rate of less than 10%; when the water temperature is in the range of 10-40℃, the flux changes linearly with temperature and can be fully recovered when the temperature returns to the standard value. For actual raw water with turbidity ≤8 NTU (the recommended working turbidity), the actual operating flux can still maintain more than 800 L/h, fully meeting the large-flow water supply requirements of industrial and commercial water treatment systems.

Salt Rejection Rate

As a high-precision EPP particulate filtration cartridge, the RCP900-20EPP is optimized for the physical interception of non-ionic salt contaminants and colloidal salt particles, with a salt rejection rate of ≥99% for insoluble salt particulates and colloidal salt with particle size above 2 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 service life of the entire desalination system. In addition, the cartridge can intercept more than 98% of macromolecular organic salts in water, further optimizing the feed water quality for subsequent precision treatment systems.

Pressure Drop

Under the rated flux (900 L/h) and standard operating conditions, the initial pressure drop of the RCP900-20EPP is ≤0.015MPa, which is significantly lower than that of conventional PP filter cartridges of the same precision, realizing low-energy-consumption operation of high-flow systems. With the progress of filtration and the gradual accumulation of 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 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 RCP900-20EPP is precisely calibrated to 80,000 Daltons (Da), which is perfectly matched with its 2-micron high filtration precision and enhanced EPP material structure. This MWCO rating can effectively retain macromolecular organic matter, colloidal particles, macromolecular impurities and organic polymers with molecular weight higher than 80,000 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 high-precision large-flow water treatment systems, and can effectively reduce the macromolecular contaminant load of subsequent precision membrane elements, extending their service life.

Membrane Thickness

The RCP900-20EPP adopts a three-layer composite enhanced polypropylene membrane structure with a total effective membrane thickness of 30mm, which is thicker than conventional PP filter cartridges, greatly improving the dirt-holding capacity and mechanical strength. The surface filtration layer (6mm) is a dense enhanced EPP membrane, responsible for high-precision interception of 2-5 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 (6mm) is a high-density EPP membrane, enhancing the overall pressure resistance and extrusion resistance of the cartridge. This three-layer thickness distribution balances high filtration precision, super dirt-holding capacity and high mechanical strength, making the cartridge resistant to deformation and rupture under high-pressure and high-flow working conditions.

Replacement Cycle

The recommended standard replacement cycle of the RCP900-20EPP is 4-6 months, formulated based on the standard working conditions: raw water turbidity ≤8 NTU, suspended solids content ≤15 mg/L, and 24-hour continuous system operation. For water treatment systems with harsh water quality conditions (turbidity >8 NTU, suspended solids content >15 mg/L) such as industrial raw water and municipal sewage reclaimed water, the replacement cycle is shortened to 2-4 months according to the actual system pressure drop and water quality test results; for low-turbidity high-quality raw water pre-filtration scenarios (turbidity ≤2 NTU) such as pure water and mineral water production, with regular gas-water backwashing and online maintenance, the replacement cycle can be appropriately extended to 6-9 months, effectively reducing the system’s use and maintenance costs.

Features

Modified Enhanced EPP Raw Material: Adopts food-grade modified EPP material with higher density and mechanical strength than conventional PP, acid and alkali resistant (pH 1-13), corrosion resistant to most industrial water chemicals, and adaptable to complex industrial water quality conditions.
3D Gradient Melt-Blown Structure: Three-dimensional gradient pore design realizes step-by-step impurity interception, super high dirt-holding capacity, slow pressure drop rise, and stable filtration performance under long-term high-flow operation.
Ultra-Low Initial Pressure Drop: Optimized pore structure and membrane thickness design result in an initial pressure drop of ≤0.015MPa, reducing water pump energy consumption and achieving energy-saving operation of high-flow systems.
Adhesive-Free Integrated Forming: Advanced hot-melt welding one-piece forming technology, no seams or filter bypass, avoiding unfiltered water leakage and ensuring the purity of filtered water.
Super High Pressure Resistance: 30mm thick composite EPP membrane structure can withstand a maximum operating pressure of 0.6MPa, no deformation or rupture under high-pressure and high-flow impact, with long service life.
Backwash Recoverable Performance: For slight blockage, the filtration performance can be recovered by gas-water backwashing, reusable for multiple times, reducing replacement frequency and use costs.
Standard Universal Interface: 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.
Safety & Environmental Protection: Free of adhesives, heavy metals, phthalates and other harmful substances, compliant with FDA/NSF standards, no chemical leaching in contact with water, and the spent cartridge can be recycled as PP plastic, meeting environmental protection requirements.

Application Fields

Large-Flow Industrial Process Water Pre-Filtration: Chemical, petrochemical, electronics, metallurgy, papermaking and printing and dyeing industries’ process water, cooling water and circulating water pre-filtration, removing fine particulates and colloids to protect subsequent precision heat exchangers, RO/NF membranes and precision valves.
Commercial Central Water Supply Systems: Large shopping malls, high-end hotels, office buildings, hospitals, universities and large residential communities’ central water supply fine filtration, meeting large-flow domestic and service water demand and improving tap water quality.
Industrial RO/NF Desalination System Pre-Filtration: Special pre-filtration for large-flow industrial reverse osmosis and nanofiltration desalination systems, reducing the particulate and macromolecular contaminant load of membrane elements, and extending the service life of RO/NF membranes by 30% or more.
Food & Beverage Industry Water Treatment: Large-scale beverage, dairy, beer, wine 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 product safety.
Municipal Sewage Advanced Treatment & Reclaimed Water Reuse: Municipal sewage secondary treatment effluent advanced filtration, reclaimed water reuse for industrial cooling, urban greening, road cleaning and toilet flushing, removing suspended solids and colloids to improve reclaimed water quality.
Water Plant Large-Flow Filtration: 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 improving the quality of finished tap water.
Aquaculture & Aquatic Product Processing: Large-scale marine and freshwater aquaculture circulating water systems, aquatic product processing production water filtration, removing particulate impurities, residual bait and excrement to optimize the aquaculture water environment and improve product quality.
Pharmaceutical & Biotech Industry Pre-Filtration: Pre-filtration of raw water for pharmaceutical production and biotech research and development water systems, meeting the high-precision pre-filtration requirements of pharmaceutical water treatment systems.

Conclusion

The RCP900-20EPP 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 2-micron high precision filtration, 900 L/h ultra-high flux, ultra-low energy consumption and super dirt-holding capacity. Based on modified enhanced EPP raw materials and three-dimensional gradient melt-blown technology, the product has excellent mechanical strength, corrosion resistance and pressure resistance, and can maintain stable and efficient filtration performance under complex water quality and 24-hour continuous operation conditions. Its ultra-low initial pressure drop design effectively reduces the energy consumption of high-flow water treatment systems, and the backwash recoverable performance greatly lowers the daily use and maintenance costs. Compliant with FDA and NSF international safety standards, with a standard universal interface and easy installation and maintenance, the RCP900-20EPP can be widely applied to pre-filtration and fine filtration of various large-flow water treatment systems, providing reliable 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, 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 and energy-saving operation of water treatment systems.

RCP900-20EPP Food Grade Enhanced Polypropylene (EPP) Filter Cartridge for Large-Flow RO/NF Water Treatment Systems