The RCP400-40EPP is an industrial-grade ultra-large-specification water treatment filtration product engineered with advanced Enhanced Polypropylene (EPP) membrane technology, professionally optimized for 40 L/m²·h stable medium flux and high-precision purification in ultra-large-capacity water treatment scenarios that demand massive processing volume, balanced operational efficiency and consistent effluent quality—including municipal central water supply, large-scale industrial process water preparation, industrial park shared water supply and large-flow wastewater advanced treatment & resource reuse. As a core ultra-large-spec medium-flux model of the EPP membrane series, it integrates an extra-expanded high-efficiency filtration area with a high-selectivity, anti-fouling EPP membrane core, and is equipped with a reinforced heavy-duty industrial-grade pressure-resistant and anti-corrosion structural housing with integrated high-sealing technology. This design achieves an optimal balance between ultra-large processing capacity, stable medium flux and reliable high-precision purification, a core advantage tailored for large-scale water treatment projects that pursue both massive water output and cost-effective operational efficiency. The product is fully compatible with industrial large-diameter pressure pipeline systems, supports flexible modular parallel and series operation for on-demand system capacity expansion and purification precision adjustment, and features excellent anti-pollution, high-load resistance and broad water quality adaptability. It enables stable long-term continuous operation with complex raw water sources (surface water, groundwater, industrial secondary water, municipal sewage effluent) after simple targeted pre-treatment (3 μm coarse filtration). With a humanized heavy-duty modular structure, the RCP400-40EPP is easy to install, operate and maintain, and serves as a high-cost-performance, high-reliability core filtration solution for ultra-large-capacity medium-flux high-precision water purification projects, realizing municipal high-standard drinking water preparation, large-scale industrial process water supply and large-flow wastewater resource reuse with low energy consumption, stable performance and consistent effluent quality.

The RCP400-40EPP features an ultra-high nominal filtration precision of 0.008 microns, with a nanoscale uniformly microporous EPP membrane surface formed by advanced phase inversion, high-density molding and precision pore-forming technology. The membrane pore size distribution is highly consistent, and there are no filtration blind spots even under the ultra-large load medium-flux operation of 40 L/m²·h and continuous massive water passing volume. This high-precision filtration capability can effectively intercept and remove submicron suspended solids, colloidal particles, bacteria, viruses, algae spores, micro-particle impurities and all macromolecular organic pollutants in raw water, ensuring that the effluent water quality stably meets national and industrial Grade I ultra-pure water standards and international advanced pure water quality requirements, fully satisfying the strict purity demands of municipal high-standard water supply, large-scale industrial production, food and beverage processing and large-flow wastewater advanced treatment. The filtration precision remains completely unaltered with slight fluctuations in inlet water turbidity (≤18 NTU), temperature (5℃-40℃) and impurity content within a reasonable range, avoiding any micro-impurity leakage and providing a solid and reliable technical guarantee for subsequent water treatment processes or direct use in various ultra-large-flow medium-flux high-precision water demand scenarios.

Under standard operating conditions (25℃, rated working pressure), the RCP400-40EPP achieves a pure water flux of 40 L/m²·h—a stable medium flux design exclusively tailored for its 400 ultra-large-spec filtration area and heavy-duty long-term operating conditions. This flux setting is optimized for the balanced demand of processing efficiency, operational stability and membrane service life, breaking the traditional trade-off between ultra-large processing capacity, flux efficiency and filtration precision of large-spec filtration products. The product’s optimized low-resistance wide-channel water flow design and high-permeability EPP membrane material effectively minimize flux attenuation caused by membrane fouling and high-load medium-flux operation; within the normal operating range (water temperature 5℃-40℃, inlet water turbidity ≤18 NTU), the flux remains highly stable with a monthly attenuation rate of ≤2.0% during long-term continuous operation. This ultra-stable medium-flux performance, combined with the extra-expanded ultra-large filtration area, forms the massive high-efficiency processing capacity of the product, fully meeting the ultra-large-volume high-precision water demand of municipal centralized water supply systems, large-scale industrial production bases, industrial park shared water supply and large-flow wastewater treatment projects, while ensuring high purification precision and long-term operational stability, and effectively guaranteeing the consistency and high standard of effluent quality in ultra-large-capacity operation.

The RCP400-40EPP delivers excellent and ultra-stable salt rejection performance under standard 400 ultra-large-spec medium-flux high-load operating parameters, with a 98.9% rejection rate for monovalent inorganic salt ions and a 99.5% rejection rate for divalent inorganic salt ions—performance levels that far surpass conventional EPP membrane products of the same specification and set a high industry standard for ultra-large-spec medium-flux polypropylene filtration products. The ultra-dense, high-purity selective separation layer of the enhanced EPP membrane material forms a highly efficient ion barrier with strong molecular selectivity, which can effectively block the passage of various salt ions, inorganic impurities, dissolved solids and trace mineral ions while ensuring the smooth and rapid penetration of water molecules even under the medium-flux high-load operation of 40 L/m²·h and ultra-large water passing volume. The salt rejection rate remains extremely stable (variation ≤0.25%) even with slight fluctuations in inlet water salinity (≤4000 mg/L) and operating pressure, making the product an ideal core filtration choice for large-scale ultra-pure water preparation, municipal high-standard drinking water deep purification, high-end industrial process water deep softening, large-scale brackish water desalination and large-flow wastewater advanced desalination treatment in industries with strict salt content limits such as electronic component manufacturing, pharmaceutical production, food and beverage deep processing and municipal water supply.

During normal continuous operation at rated 40 L/m²·h medium flux and standard water temperature (25℃), the pressure drop of the RCP400-40EPP is strictly controlled within the ultra-low range of 0.07-0.12 MPa. Aiming at the 400 ultra-large-spec filtration area and massive water passing volume of medium-flux operation, the product adopts a highly optimized heavy-duty low-resistance internal structural design, including a smooth large-diameter water inlet/outlet channel, a high-porosity high-strength porous support layer with uniform pore distribution, a streamlined multi-channel water distribution layout and integrated low-resistance flow guide technology, which minimizes water flow resistance in the filtration process to the greatest extent and avoids local pressure loss caused by massive water volume passing and high-precision filtration. This ultra-low pressure drop performance for ultra-large-spec medium-flux operation significantly reduces the energy consumption of the water treatment system’s booster pump and water delivery pump, lowers the overall operational energy cost of the ultra-large-capacity high-precision water treatment system by more than 25% compared with conventional large-spec products, and fundamentally avoids membrane core damage and structural deformation caused by excessive pressure accumulation in the pipeline and filtration core under large-flow medium-flux high-precision operation. The pressure drop has almost no obvious increase during the normal service life; a slight rise (≤0.025 MPa) is only observed when regular deep cleaning is required, which is easy to identify and handle, ensuring the long-term stable, ultra-energy-efficient and low-loss operation of the entire ultra-large-capacity medium-flux high-precision water treatment system.

The Molecular Weight Cutoff of the RCP400-40EPP is accurately calibrated at 750 Da (Daltons), a precise setting tailored for its 400 ultra-large-spec filtration area, 40 L/m²·h stable medium flux and ultra-large-capacity high-precision water treatment scenarios. This MWCO value enables the precise selective interception of small and medium molecular weight impurities in water while allowing water molecules and beneficial trace inorganic small molecules to pass through smoothly—even under continuous medium-flux high-load operation with ultra-large water passing volume and high-precision filtration. This optimized MWCO performance can effectively block trace organic small molecules, colloidal substances, low-molecular-weight polymers, protein impurities, polysaccharides, humic acid and other micro-pollutants with a molecular weight higher than 750 Da, and is specially suitable for the high-precision separation and purification of water containing trace low-molecular-weight organic pollutants in municipal high-standard water supply, large-scale industrial production, food and beverage processing and large-flow wastewater advanced treatment. The accurate MWCO design perfectly combines ultra-large-spec medium-flux high-load operation, high-precision purification and massive processing capacity, ensures the strictest high-standard and consistent effluent water quality, and meets the differentiated ultra-large-capacity high-precision water quality requirements of various industrial, municipal, food and environmental protection application scenarios.

The core filtration membrane of the RCP400-40EPP is a heavy-duty multi-layer composite enhanced EPP membrane with a total thickness of 185 μm, scientifically composed of three functional layers that are exclusively optimized for its 400 ultra-large-spec, 40 L/m²·h stable medium flux and heavy-duty long-term high-precision operation: a 37 μm ultra-dense selective separation layer (the core functional layer for high-precision filtration and high salt rejection, made of high-purity high-strength EPP material with advanced nanoscale precision pore-forming and cross-linking technology, ensuring uncompromised ultra-high purification performance under long-term medium-flux high-load operation and massive water passing volume); a 120 μm high-strength porous support layer (providing super strong mechanical support and pressure resistance for the membrane under ultra-large-spec, medium-flux and large-flow working conditions, adopting a reinforced cross-linked polypropylene structure with optimized porosity and pore size distribution to avoid membrane deformation and damage caused by long-term water flow impact and high-load operation); and a 28 μm anti-fouling protective layer (modified with special hydrophilic and anti-adhesion heavy-duty nanotechnology, reducing membrane surface pollution and mechanical wear by more than 38%, and inhibiting the adsorption of organic pollutants, microorganisms, colloids and trace impurities to slow down fouling rate under medium-flux large-flow high-precision operation). The three-layer thickness and material optimization design, combined with heavy-duty high-density molding technology, ensure the membrane’s long-term structural stability, ultra-high purification efficiency and anti-load performance while maintaining excellent water permeability and stable medium flux, which is the core key to realizing the perfect balance between ultra-large processing capacity, high-precision purification and operational efficiency of the product.

Under standard operating conditions and strict adherence to the regular maintenance and deep cleaning schedule, the recommended replacement cycle of the RCP400-40EPP is 36-48 months—an ultra-extended service life specially designed for its 400 ultra-large-spec, 40 L/m²·h stable medium flux and heavy-duty ultra-large-capacity high-precision operating scenarios, far longer than conventional small, medium and general large-spec EPP membrane filtration products. The actual replacement cycle can be flexibly adjusted according to the actual inlet water quality and operating frequency: for raw water with ultra-low impurity content, low salinity and regular professional deep cleaning (1 time per quarter), the replacement cycle can be extended to 48 months; for raw water with moderate impurity content and 24-hour continuous high-load operation, the recommended replacement cycle is 36 months to ensure the stable operation of ultra-high filtration precision, stable flux and salt rejection performance; for raw water with relatively high impurity content (such as industrial secondary water), the cycle can be appropriately shortened to 32-36 months based on real-time detection data of water quality and operating parameters. The main quantitative indicators for replacement include a significant decrease in flux (≥12%), a sharp rise in pressure drop (≥0.035 MPa) or a noticeable decline in salt rejection rate (≥0.3%); the product’s heavy-duty modular integrated design makes the replacement process simple and fast, requiring no professional special tools, and a small operating team can complete the entire replacement operation within 55 minutes, minimizing the downtime of the ultra-large-capacity high-precision water treatment system and ensuring the continuous operation of municipal centralized water supply and large-scale industrial production.

The RCP400-40EPP has a number of outstanding core features that make it a leading choice in the ultra-large-spec medium-flux high-precision water treatment market, combining advanced enhanced EPP membrane technology with heavy-duty 400 ultra-large-spec structural design for professional 40 L/m²·h stable medium flux and ultra-large-capacity high-precision water purification scenarios. 1. 400 ultra-large-spec filtration area & 40 L/m²·h stable medium flux dual optimization: Realizes the perfect balance between massive water processing capacity and stable medium flux, breaking the traditional trade-off between ultra-large capacity, filtration precision and operational efficiency of large-spec filtration products, and meeting the ultra-large-volume high-precision water demand of large-scale projects that pursue balanced output and efficiency. 2. Food & industrial dual-certified heavy-duty EPP membrane material: Adopts food-grade and industrial-grade dual-certified enhanced EPP membrane materials with heavy-duty high-density molding technology, non-toxic, odorless, free of heavy metal leaching, organic matter precipitation and trace impurity release, no secondary pollution to water quality, and has excellent anti-load, anti-fouling, chemical resistance and medium-flux stable performance, fully meeting the strictest safety, purity and long-term operation requirements of municipal high-standard drinking water supply, high-end industrial production and food and beverage processing. 3. Excellent ultra-stable salt rejection & calibrated MWCO performance: 98.9% monovalent and 99.5% divalent salt rejection rate, combined with 750 Da accurately calibrated MWCO, ensures the strictest high-standard and consistent effluent water quality and stable selective interception of trace micro-impurities, meeting the ultra-pure water requirements of various ultra-large-capacity municipal, industrial, food and environmental protection scenarios with strict purity demands. 4. Ultra-low pressure drop & super energy efficiency for ultra-large-spec medium-flux operation: The 0.07-0.12 MPa ultra-low operating pressure drop under 40 L/m²·h medium flux and ultra-large-capacity high-precision operation significantly reduces the energy consumption of the system’s water delivery and booster equipment, realizing ultra-energy-saving and environmentally friendly operation of ultra-large-capacity high-precision water treatment systems and effectively cutting down users’ long-term operational costs by more than 25%. 5. Superior heavy-duty structural stability & ultra-broad water quality adaptability: The reinforced heavy-duty engineering plastic housing and high-strength EPP membrane material enable stable operation under a wide working pressure range of 0.5-1.4 MPa, resistant to short-term pressure fluctuations and massive water flow impact without membrane deformation and structural damage; with an ultra-wide pH adaptation range of 2-11, it can adapt to the treatment of surface water, groundwater, tap water, industrial secondary water and municipal sewage effluent with different quality characteristics after simple 3 μm pre-filtration. 6. Heavy-duty modular design & flexible on-demand expansion: Extra-expanded ultra-large filtration area design meets the massive high-precision water demand of large-scale projects; multiple units can be connected in parallel or series to realize flexible expansion of system processing capacity and purification precision, adapting to different scale requirements of various water treatment projects from large to super large without changing the core pipeline layout, and the modular structure is easy for centralized intelligent management and maintenance. 7. Enhanced anti-fouling performance & ultra-extended service life: Membrane surface hydrophilic and anti-adhesion heavy-duty nanomodification technology reduces pollutant adsorption by more than 38%, and optimized low-resistance multi-channel flow design slows down membrane fouling rate under medium-flux large-flow high-precision operation; the 36-48 months ultra-extended replacement cycle effectively reduces the system’s maintenance and replacement costs, and improves the overall operation efficiency and economic benefits of the ultra-large-capacity high-precision water treatment system. 8. Heavy-duty integrated modular structure & easy maintenance: The whole machine adopts an integrated heavy-duty modular design that matches industrial large-diameter pressure pipeline accessories, with integrated high-sealing technology to avoid water leakage; disassembly, online CIP cleaning and core replacement processes are simple and fast, and regular daily maintenance does not require professional technical personnel, greatly reducing the labor cost and maintenance difficulty of system operation and maintenance. 9. Massive processing capacity & high effluent quality consistency: The 400 ultra-large-spec filtration area ensures massive water processing capacity to meet the ultra-large-volume water demand of municipal centralized supply and large-scale industrial production, while the stable medium flux design guarantees the high consistency of effluent quality, avoiding quality fluctuations caused by flux changes and meeting the standardized water quality requirements of large-scale projects.

Benefiting from its core advantages of 400 ultra-large-spec filtration area, 40 L/m²·h stable medium flux, ultra-high precision, heavy-duty stable performance and ultra-broad adaptability, the RCP400-40EPP is widely applicable to various ultra-large-capacity municipal, industrial, food and beverage and environmental protection water treatment fields that require both massive water volume output, strict purification quality and balanced operational efficiency. In the municipal high-standard water supply field, it is the core filtration product for municipal tap water deep purification and centralized supply in large and medium-sized cities, new urban areas, municipal central water supply plants and high-end residential clusters with massive water demand, improving municipal drinking water quality to meet international high-standard drinking water requirements, and ensuring the safe and high-quality water supply for a large number of urban residents and commercial areas. In the large-scale industrial field, it is the core filtration equipment for large-scale ultra-pure water preparation in electronic component manufacturing bases, new energy battery production clusters, petrochemical production bases and mechanical processing industrial parks, realizing large-scale high-precision industrial process water supply and meeting the strict purity demands of large-scale industrial production. In the food and beverage deep processing field, it is applied to large-scale pure water and purified water preparation in large food processing enterprises, beverage production bases, dairy product manufacturing plants and condiment processing factories, adopting food-grade EPP membrane material to ensure the safety and purity of production water, and meeting the strict food safety national standards and product quality requirements. In the environmental protection advanced treatment field, it is the core product for large-scale municipal sewage advanced treatment and resource reuse, large-flow industrial wastewater deep purification and desalination treatment, and large-scale brackish water desalination in coastal and semi-arid areas, realizing the efficient utilization of water resources and the high-level improvement of regional water ecological environment, and meeting the national environmental protection emission and water resource reuse standards. In addition, this model is also suitable for the ultra-large-capacity high-precision water treatment of centralized water supply systems in large high-tech industrial parks, large logistics parks and commercial complexes, as well as the process water preparation in aerospace, shipbuilding and marine engineering bases with massive water volume demand, high pure water requirements and balanced efficiency demands.

In summary, the RCP400-40EPP is a heavy-duty 400 ultra-large-specification, high-performance and multi-scenario applicable water treatment filtration product that integrates advanced enhanced EPP membrane technology, optimized 40 L/m²·h stable medium flux design and heavy-duty ultra-large-spec structural design for ultra-large-capacity high-precision water purification scenarios. As a core ultra-large-spec medium-flux model of the EPP membrane series, it breaks the long-standing performance limit between ultra-large processing capacity, high-precision purification and operational efficiency of polypropylene membrane products, realizing a 400 ultra-large filtration area, 40 L/m²·h stable medium flux, 0.008 micron ultra-high filtration precision, 99.5% divalent salt rejection rate and 750 Da calibrated MWCO while maintaining an ultra-low pressure drop of 0.07-0.12 MPa under medium-flux ultra-large-capacity operation. Its outstanding advantages including 400 ultra-large-capacity and stable medium flux dual optimization, excellent ultra-stable salt rejection performance, super energy efficiency for ultra-large-spec medium-flux operation, superior heavy-duty structural stability, ultra-broad water quality adaptability, flexible modular configuration, ultra-extended service life and easy installation and maintenance not only ensure the strictest high-standard and consistent effluent quality for ultra-large-capacity high-precision water treatment projects, but also effectively reduce the overall operation, maintenance and energy consumption costs of the system by more than 25%. The product’s 400 ultra-large-spec design and 40 L/m²·h stable medium flux perfectly meet the massive high-precision water demand of municipal high-standard centralized water supply, large-scale industrial production, food and beverage deep processing and environmental protection advanced treatment that pursue balanced effluent quality and operational efficiency, and its excellent compatibility with various mainstream high-precision water treatment processes (RO, EDI, UF, UV disinfection, ozone oxidation, ion exchange) makes it a versatile, high-reliability and irreplaceable core filtration component for ultra-large-capacity high-precision water treatment systems. Whether it is for municipal high-standard drinking water deep preparation in large cities, large-scale ultra-pure water production in industrial bases, large-flow municipal sewage advanced treatment and resource reuse, or large-scale brackish water desalination in special areas, the RCP400-40EPP can provide a customized, efficient and reliable one-stop ultra-large-capacity high-precision filtration solution. Adhering to the design concept of ultra-large capacity, high precision, balanced efficiency and long durability, this product can help users optimize ultra-large-capacity high-precision water treatment processes, improve water resource utilization efficiency on a massive scale, reduce environmental protection investment and operational costs, and realize the sustainable development of water treatment projects, making it an ideal core filtration choice for various ultra-large-capacity medium-flux high-precision water treatment application scenarios.

The RCP400-40EPP is the 400 ultra-large-specification 40 L/m²·h stable medium flux core model in the professional enhanced EPP membrane water treatment series, and the matching related products cover core filtration series models, special heavy-duty medium-flux pre-filtration protection, professional deep cleaning agents, high-precision intelligent control systems and customized heavy-duty installation accessories, fully meeting the differentiated ultra-large-capacity high-precision water treatment needs of different users and various large-scale application scenarios. For the same series core filtration products, there are four complementary models to meet different large-scale project demands: RCP300-40EPP (large-specification 40 L/m²·h stable medium flux model with reduced filtration area, suitable for large-scale high-precision water treatment projects such as prefecture-level municipal water supply plants, medium-sized industrial production bases and large food processing enterprises with daily water demand of 800-1500 tons); RCP500-40EPP (super-large-specification 40 L/m²·h stable medium flux model with expanded filtration area, designed for super large-scale high-precision water treatment projects such as municipal central water supply plants in megacities, national-level industrial parks and coastal large-scale brackish water desalination projects with daily water demand ≥2500 tons); RCP400-20EPP (400 ultra-large-specification low-flux ultra-high precision model with 20 L/m²·h pure water flux, suitable for ultra-large-capacity water treatment projects with the strictest purity and stability requirements such as electronic chip manufacturing and pharmaceutical GMP production); RCP400-60EPP (400 ultra-large-specification high-flux model with 60 L/m²·h pure water flux, suitable for ultra-large-capacity water treatment projects with higher processing efficiency requirements and moderate purity demands such as general industrial production and municipal primary water supply). In terms of matching pre-filtration products, the RCP-PRE20 EPP Heavy-Duty Medium-Flux Special Pre-Filter is specially designed for the 400 ultra-large-spec medium-flux EPP series, with a 3 μm ultra-fine coarse filtration precision and a heavy-duty large-flow low-resistance water channel design optimized for 40 L/m²·h stable medium flux operation, which can effectively remove fine particle impurities, sand, colloid, suspended solids and large granular organic matter in raw water, avoid membrane fouling and damage caused by fine particles under medium-flux large-flow high-precision operation, and extend the service life of the 400 ultra-large-spec EPP membrane core by 35-40%. For professional cleaning products, the RCP-CLE20 EPP Heavy-Duty Medium-Flux Membrane Special Deep Cleaning Agent is a three-component high-efficiency cleaning agent (acidic + alkaline + enzymatic) specially formulated for the pollution characteristics of EPP membranes under 400 ultra-large-spec medium-flux operation and complex raw water quality conditions, which can quickly and effectively remove organic fouling, scale, microbial slime, trace organic deposits and heavy metal ion impurities on the membrane surface without damaging the ultra-dense separation layer, restore the filtration flux and salt rejection performance of the EPP membrane to more than 98% of the original state, and reduce the frequency of core replacement. In terms of intelligent control accessories, the RCP-CONT20 Ultra-Large-Spec EPP Medium-Flux Intelligent Operation and Monitoring Unit is perfectly matched with the 400 ultra-large-spec medium-flux EPP series, which can realize real-time and high-precision monitoring of key operating parameters (flux, pressure drop, inlet/outlet water salinity, TDS, turbidity, temperature, water flow, dissolved oxygen, etc.) for single or multiple parallel units with millisecond-level response, and support automatic alarm, automatic low-pressure backwashing, intelligent CIP cleaning reminder and remote data transmission, greatly improving the automation level and operational stability of ultra-large-capacity high-precision water treatment systems and reducing manual operation and maintenance costs by more than 40%. In addition, the key supporting accessories also include two exclusive heavy-duty products for 400 ultra-large-spec medium-flux high-precision operation: RCP-ACC19 Ultra-Large-Spec EPP Heavy-Duty Medium-Flux Installation Accessory Kit (providing heavy-duty high-pressure anti-leakage connectors, food-grade/industrial-grade anti-aging gaskets, reinforced fixed brackets and pressure-resistant sealing parts that are resistant to massive water flow impact and trace impurity release, supporting quick installation with industrial large-diameter pressure pipelines and ensuring connection airtightness to avoid secondary pollution and pressure loss under medium-flux large-flow high-precision operation) and RCP-BR18 Medium-Pressure EPP Heavy-Duty Medium-Flux Membrane Backwashing Pump (special matching accessory for 400 ultra-large-spec medium-flux EPP filtration products, realizing efficient variable-pressure reverse backwashing of the membrane core with adjustable pressure and large backwashing flow, further reducing membrane fouling under medium-flux large-flow high-precision operation, restoring membrane permeability to the greatest extent, and extending the service life of the EPP membrane core by an additional 25-30% without damaging the ultra-dense separation layer). The RCP-MON17 Ultra-Large-Spec EPP Medium-Flux Ultra-High Precision Water Quality Analyzer is a top-tier matching accessory for the RCP-CONT20 unit, which can realize real-time and accurate detection of multi-dimensional water quality parameters (TDS, conductivity, pH, ORP, dissolved oxygen, turbidity, trace ions, water flow, etc.) with a wide detection range and 0.001-level high precision, and transmit data to the intelligent control unit in real time, realizing closed-loop high-precision monitoring and intelligent control of the entire ultra-large-capacity medium-flux high-precision water treatment system.