RCP030-20SPP Water Treatment Filter Cartridge Technical Specification

Product Introduction

The RCP030-20SPP is a high-reliability spun polypropylene (SPP) water filter cartridge, engineered for low-medium flow precision pre-filtration and fine filtration in small commercial, laboratory and light industrial water treatment scenarios. As a core product of the RCP030 series, it adopts food-grade high-purity spun polypropylene raw materials and advanced multi-directional spinning winding technology, optimized with a 20SPP core structure to achieve an ideal balance of 20-micron filtration precision, 30L/h stable low-medium flux and excellent dirt-holding capacity. Free of adhesives, heavy metals, plasticizers and other harmful leachables, the cartridge fully complies with FDA, NSF and international drinking water material safety standards, ensuring zero secondary pollution to water bodies. It is specially designed to intercept suspended solids, 20-micron particulate impurities, colloidal aggregates and coarse macromolecular contaminants in low-medium flow water systems, providing durable front-end protection for subsequent small-scale precision filtration equipment such as mini RO membranes, ultrafiltration membranes and compact water purifiers. The product’s spun structure and optimized pore distribution make it adaptable to intermittent and continuous operation modes, perfectly matching the water supply characteristics of small commercial and light industrial low-medium flow water treatment systems.

Filtration Precision

The RCP030-20SPP features a graded spinning winding filtration structure with a nominal filtration precision of 20 microns and an absolute filtration precision of 25 microns. Its multi-layer spun winding design consists of a dense surface interception layer, a porous transition impurity storage layer and a high-strength core support layer, which can realize targeted and step-by-step capture of impurities with particle sizes above 20 microns in low-medium flow water flow. The dense surface spun layer effectively blocks coarse particulates and suspended solids that are easy to cause clogging of subsequent miniature precision membrane elements, while the inner transition layer’s three-dimensional porous structure stores 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 long-term continuous low-medium flow working conditions (≤30L/h) and variable inlet pressure environments (0.05-0.2MPa).

Flux

Under the standard operating conditions (25℃ ambient temperature, 0.15MPa inlet pressure, pure water medium), the pure water flux of the RCP030-20SPP is stably set at 30 L/h (liters per hour), the core low-medium flow design advantage of this product. Within the recommended operating pressure range of 0.08-0.2MPa, the flux variation rate is less than 6%, maintaining ultra-stable output for small commercial and laboratory low-medium flow water systems; when the water temperature is in the range of 5-45℃ (the optimal working temperature for small-scale purification systems), 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 ≤25 NTU (the recommended working turbidity for low-medium flow scenarios), the actual operating flux can still maintain more than 27 L/h, fully meeting the low-medium flow, stable water supply and purification requirements of small commercial, laboratory and light industrial auxiliary water treatment systems.

Salt Rejection Rate

As a low-medium flow spun polypropylene coarse filtration cartridge, the RCP030-20SPP is optimized for the physical interception of non-ionic salt contaminants, coarse colloidal salt particles and insoluble salt precipitates with particle sizes above 20 microns, with a salt rejection rate of ≥99.5% for insoluble salt particulates and salt-containing colloidal aggregates with particle sizes above 20 microns. For soluble inorganic salts, it serves as a professional pre-filtration component for small-scale desalination systems such as mini RO and compact NF membranes, which can effectively reduce the coarse particulate salt load in the feed water of subsequent small precision desalination membrane elements (with limited effective area). This avoids salt scaling and particulate fouling on the membrane surface, thus improving the overall salt rejection efficiency and extending the service life of the entire small-scale desalination system by more than 30%. In addition, the cartridge can intercept more than 99% of coarse macromolecular organic salts in low-medium flow water systems, further optimizing the feed water quality for subsequent precision purification equipment.

Pressure Drop

Under the rated flux (30 L/h) and standard operating conditions, the initial pressure drop of the RCP030-20SPP is ≤0.008MPa, which is significantly lower than that of conventional PP filter cartridges of the same precision, realizing ultra-low energy consumption operation of low-medium flow water treatment systems without the need for additional booster pumps. With the progress of filtration work and the gradual accumulation of intercepted coarse impurities, the pressure drop of the cartridge rises slowly and stably due to its excellent dirt-holding capacity; the recommended maximum allowable operating pressure drop is 0.06MPa. 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 water supply flow of small-scale systems, abnormal operation of subsequent precision equipment and even structural damage to the cartridge caused by pressure accumulation in the compact filter housing.

Molecular Weight Cutoff (MWCO)

The molecular weight cutoff of the RCP030-20SPP is precisely calibrated to 350,000 Daltons (Da), which is perfectly matched with its 20-micron coarse filtration precision and spun polypropylene three-dimensional porous structure. This MWCO rating can effectively retain large macromolecular organic matter, coarse colloidal particles, macromolecular impurity aggregates and organic polymers with molecular weight higher than 350,000 Da in low-medium flow water systems, while ensuring the unimpeded passage of water molecules, small-molecular inorganic substances and trace beneficial ions. It is specially designed for the coarse pre-filtration requirements of low-medium flow, low-pressure water treatment systems, and can effectively reduce the large molecular contaminant load of subsequent miniature precision membrane elements, avoiding membrane clogging and improving the overall operation efficiency of small-scale purification systems by more than 25%.

Membrane Thickness

The RCP030-20SPP adopts a three-layer composite spun polypropylene membrane structure adapted to low-medium flow design, with a total effective membrane thickness of 18mm. The surface filtration layer (4mm) is a dense high-purity spun SPP membrane, responsible for precision interception of 20-25 micron coarse particulates, with excellent wear resistance and anti-clogging performance suitable for low-medium flow scouring; the middle transition support layer (10mm) is a porous gradient spun SPP membrane, undertaking secondary interception of impurities and providing stable three-dimensional structural support for the surface layer, which is the main dirt-holding area of the cartridge with large impurity storage capacity; the bottom base layer (4mm) is a high-density spun SPP membrane, enhancing the overall pressure resistance and extrusion resistance of the cartridge while ensuring the structural stability of the spinning winding structure. This scientific three-layer thickness distribution balances high coarse filtration efficiency, super dirt-holding capacity and moderate structural compactness, making the cartridge resistant to deformation and rupture under long-term low-pressure, low-medium flow working conditions, and suitable for installation in small and medium-size standard filter housings.

Replacement Cycle

The recommended standard replacement cycle of the RCP030-20SPP is 5-7 months, formulated based on the standard low-medium flow working conditions: raw water turbidity ≤25 NTU, suspended solids content ≤35 mg/L, and 10-16 hours of daily operation (matching small commercial/laboratory use habits). For low-medium flow water treatment systems with harsh water quality conditions (turbidity >25 NTU, suspended solids content >35 mg/L) such as small-scale groundwater extraction and tap water with high sediment content, the replacement cycle is shortened to 3-5 months according to the actual system pressure drop and water quality test results; for ultra-low-turbidity high-quality raw water pre-filtration scenarios (turbidity ≤6 NTU) such as laboratory pure water preparation and high-end small commercial drinking water purification, with regular simple backwashing (water flushing) and maintenance, the replacement cycle can be appropriately extended to 7-9 months, effectively reducing the use and maintenance costs of small-scale water treatment systems.

Features

Food-Grade High-Purity SPP Raw Material: Adopts food-grade high-purity spun polypropylene material with excellent chemical stability, acid and alkali resistant (pH 2-13), corrosion resistant to common drinking water and light industrial water additives, and adaptable to various low-medium flow water quality conditions.
Multi-Directional Spun Winding Structure: Advanced multi-directional spinning winding technology forms a three-dimensional porous structure, realizing step-by-step impurity interception, super dirt-holding capacity, slow pressure drop rise, and stable filtration performance under long-term low-medium flow operation.
Ultra-Low Initial Pressure Drop: Optimized spun pore size distribution and membrane thickness design result in an initial pressure drop of ≤0.008MPa, no need for booster pumps, realizing energy-saving and quiet operation of low-medium flow water systems.
Adhesive-Free Integrated Forming: Adopts one-piece spinning winding forming technology without any adhesives, no seams, no filter bypass and no dead angles, avoiding unfiltered water leakage and ensuring the purity of filtered water.
High Structural Stability: 18mm composite spun SPP membrane structure with high-strength core support, can withstand a maximum operating pressure of 0.4MPa, no deformation, no unwinding and no rupture under low-pressure impact, with excellent structural stability and long service life.
Easy Clean & Reusable: For slight to moderate blockage, the filtration performance can be quickly recovered by simple water backwashing (no need for gas-water mixing), reusable for multiple times, greatly reducing the replacement frequency and use cost.
Standard Miniature Interface Design: RCP030 series standard compact structural design, matching universal small and medium-size filter housings (food-grade plastic/304 stainless steel), small installation space, no special installation tools required, quick disassembly and assembly, and convenient daily replacement and maintenance.
Drinking Water Grade Safety: Free of any harmful substances such as adhesives, heavy metals, phthalates and plasticizers, fully compliant with FDA/NSF drinking water material standards, no chemical leaching in long-term contact with water, safe for direct drinking water pre-filtration.
Wide Temperature Adaptability: Can work stably in the water temperature range of 0-55℃, suitable for low-medium flow water treatment systems with slight temperature changes in small commercial, laboratory and light industrial scenarios.
Environmentally Friendly & Recyclable: The whole cartridge is made of homogeneous SPP material, no mixed materials, the spent cartridge can be recycled as PP plastic, meeting environmental protection recycling requirements and reducing environmental pollution.

Application Fields

Laboratory Water Purification Pre-Filtration: Pre-filtration of medium-sized laboratory water purifiers, ultra-pure water preparation systems and experimental water supply equipment, removing coarse particulates and suspended solids to protect subsequent precision water purification membranes, sensors and liquid chromatography equipment.
Small Commercial Drinking Water Systems: Pre-filtration of under-sink water purifiers in small offices, chain convenience stores, coffee shops, milk tea shops and small restaurants, small commercial drinking fountains and direct drinking water equipment, meeting the low-medium flow drinking water purification needs of small business premises.
Light Industrial Auxiliary Water Treatment: Pre-filtration of low-medium flow auxiliary water supply systems in electronic component small workshops, precision instrument maintenance, small chemical experimental units and plastic product processing workshops, removing coarse impurities to protect precision production and testing equipment.
Small-Scale RO/NF Desalination Systems: Special pre-filtration for mini reverse osmosis and nanofiltration desalination systems in small coastal workshops, island mini water supply stations and rural small-scale brackish water desalination equipment, protecting miniature desalination membrane elements and improving system efficiency.
Whole-House Medium-Flow Water Purification: Pre-filtration of whole-house medium-flow water purification systems in villas, large apartments and small residential buildings, as the first coarse filtration link to intercept sediment, rust and large particulates in tap water, protecting household water appliances and terminal water purifiers.
Aquaculture & Aquarium Water Purification: Filtration of medium-sized aquarium circulating water systems and small-scale indoor/outdoor aquaculture water supply systems, removing residual bait, fish feces, suspended solids and algae to optimize the aquaculture water quality environment.
Medical Small-Scale Water Treatment: Pre-filtration of desktop medical water purifiers, small dental clinic water supply equipment, community clinic disinfection water preparation systems and laboratory medical experimental water preparation systems, meeting the low-medium flow water quality requirements of medical and health scenarios.
Mobile Low-Medium Flow Water Purification: Pre-filtration of RV on-board medium-flow water purifiers, yacht water supply systems, marine portable water purification equipment and construction site temporary water supply purifiers, adapting to the low-pressure, variable-flow water supply characteristics of mobile scenarios.
Small-Scale Beverage & Catering Equipment: Pre-filtration of medium-sized coffee machines, tea makers, juice machines, beverage dispensers and ice makers in small catering and beverage premises, removing coarse impurities in water to improve the taste of beverages and protect equipment nozzles and pipelines.
Rural Centralized Small-Scale Water Supply: Pre-filtration of rural centralized small-scale tap water supply systems and village-level water purification stations, removing sediment, suspended solids and colloids in surface water and groundwater, improving the basic water quality of rural drinking water.

Conclusion

The RCP030-20SPP is a high-performance, cost-effective spun polypropylene filter cartridge specially developed for low-medium flow, small-scale water treatment and purification scenarios including small commercial, laboratory and light industrial applications. It integrates the core advantages of 20-micron coarse precision filtration, 30L/h stable low-medium flux, ultra-low energy consumption, super dirt-holding capacity and drinking water grade safety. Based on food-grade high-purity SPP raw materials and advanced multi-directional spinning winding technology, the product has excellent chemical stability, three-dimensional structural stability and pressure resistance, and can maintain stable and efficient filtration performance under long-term low-pressure, low-medium flow and intermittent/continuous operation modes (matching small commercial/laboratory use habits). Its ultra-low initial pressure drop design realizes energy-saving and quiet operation of low-medium flow water systems without additional booster pumps, and the easy water backwashing performance greatly lowers the daily use and maintenance costs of small-scale purification systems. Fully compliant with FDA/NSF international drinking water safety standards, with a standard compact interface and moderate size, the RCP030-20SPP can be widely applied to coarse pre-filtration and fine filtration of various low-medium flow water treatment systems. It provides durable and reliable front-end protection for subsequent miniature precision filtration equipment, optimizes the overall operation efficiency of small-scale systems, and reduces the failure rate and maintenance cost of subsequent precision equipment by more than 30%. As a professional low-medium flow water treatment filter cartridge with excellent comprehensive performance and stable spinning structure, the RCP030-20SPP is a reliable and cost-effective choice for small commercial, laboratory, light industrial and rural small-scale water purification scenarios, and can create significant practical and economic value for the safe, stable, energy-saving and efficient operation of low-medium flow water treatment and purification systems.

Related products

RCP030-10SPP: Higher precision version of the same series, 10 micron nominal filtration precision, 30L/h flux, suitable for laboratory ultra-pure water preparation and high-end small commercial drinking water pre-filtration with strict precision requirements.
RCP030-30SPP: Coarser filtration version of the same series, 30 micron nominal filtration precision, 35L/h flux, suitable for raw water with high sediment content and small-scale groundwater/rural surface water extraction pre-filtration.
RCP030-20SPP-S: Sanitary grade enhanced version, food-grade ultra-smooth SPP membrane, no dead angle compact design, suitable for medical laboratory, small food processing and beverage production low-medium flow water treatment.
RCP030 Series Filter Housing: Special matching filter housing for RCP030 series cartridges, including food-grade PP plastic and 304 stainless steel models, compact structure, easy to install, suitable for small commercial and laboratory scenarios.
RCP030-20SPP-M: Anti-scaling modified version, nano anti-scaling functional additives added in the membrane layer, suitable for low-medium flow water treatment systems with high-hardness tap water, groundwater and rural surface water.
RCP050-20SPP: Medium-flow version of the same precision, 50L/h flux, RCP050 series interface, suitable for medium-sized offices, chain stores and light industrial workshops with higher water demand.
RCP030 Backwashing Accessory Kit: Special simple backwashing kit for RCP030 series cartridges, including high-pressure flushing nozzle and connecting pipe, convenient for on-site manual water backwashing and reuse, improving cartridge utilization rate.
RCP030-20SPP-C: Activated carbon composite version, integrated SPP coarse filtration and high-quality coconut shell activated carbon adsorption, removing both particulates and residual chlorine/odors/organic matter in water, suitable for small commercial and household drinking water purification.
RCP030 Series Water Quality Test Kit: Special small test kit for RCP030 series cartridges, including turbidity test paper and pressure drop detector, convenient for on-site detection of filtered water quality and judgment of cartridge replacement time.
RCP030-20SPP-F: Anti-fouling & Anti-bacterial version, added with silver ion anti-bacterial and anti-fouling coating on the membrane surface, suitable for small-scale aquaculture, aquarium and medical laboratory low-medium flow water purification systems.
RCP030-20SPP-P: Pleated enhanced version, combined spun SPP and pleated filtration structure, higher dirt-holding capacity, suitable for low-medium flow water treatment systems with poor and variable raw water quality.

RCP030-20SPP Food Grade Spun PP (SPP) Filter Cartridge 30L/h for Small Commercial & Lab Water Purification Systems