This 10-inch deep filtration PP winded filter cartridge is a specialized food-grade water purification component engineered for the food processing industry, tailored to the small-to-medium flow water purification demands of food production lines, food processing equipment cooling, cleaning, and ingredient preparation. Exclusively designed in the industry-standard 10-inch specification and crafted from high-purity food-grade polypropylene (PP) raw materials complying with FDA, EU 10/2011 and national food safety standards for food processing water, the cartridge adopts advanced deep filtration spiral winding technology with a porous food-grade PP inner core and a multi-layer gradient PP wire filter structure. It is dedicated to the efficient deep purification of food processing water, intercepting insoluble impurities of different particle sizes including suspended solids, colloidal substances, rust particles, sediment, and fine particulate matter from tap water, well water, and raw water for food production. The deep filtration process achieves physical water purification without chemical additives, no dissolution of harmful substances, no secondary pollution, and meets the strict microbial and impurity control requirements of food processing water quality standards. With perfect compatibility with 10-inch standard food-grade filter housings, stable deep filtration performance, and adaptability to the variable water quality of food processing raw water, this 10-inch cartridge is a cost-effective and food-safe core water purification component for small and medium-sized food processing enterprises, food workshops, and food production lines with point-of-use water purification needs. It complies with the strict food safety and hygiene control requirements of the food processing industry, ensures the safety of food processing water, and lays a solid foundation for the quality and safety of finished food products.

Calibrated specifically for the water purification requirements of food processing and the impurity characteristics of food production raw water (tap water, well water), the filtration precision of this 10-inch deep filtration PP winded filter cartridge covers a customizable food industry standard range of 1 μm to 50 μm, with the most practical and commonly used specifications for food processing water purification being 5 μm, 10 μm, 20 μm and 30 μm. The 5 μm and 10 μm high-precision specifications are suitable for high-purity food processing water purification such as beverage preparation, dairy product production, edible oil refining, and pastry ingredient mixing, effectively intercepting micro colloidal substances, fine suspended solids, and tiny rust particles that affect product quality and equipment safety, ensuring the processed water meets the high-purity water quality requirements of fine food production. The 20 μm and 30 μm medium-precision specifications are designed for general food processing water purification including food workshop cleaning, production equipment cooling, vegetable and fruit washing, and meat product processing, removing large suspended solids, sediment, and coarse particulate matter from raw water, reducing the impurity load of subsequent water treatment links and preventing clogging of water pipelines and processing equipment. All precision grades adopt food-grade deep gradient winding technology, with a multi-layer filter structure that realizes graded interception of impurities of different particle sizes, stable filtration efficiency, and no precision attenuation or channeling during continuous use. They fully meet the differentiated water purification needs of various food processing links, and comply with the national food processing water quality standards (GB 5749-2022) and industry-specific water quality requirements for food production.

The flux performance of this 10-inch deep filtration PP winded filter cartridge is fully optimized for the 10-inch standard specification, the physical properties of food processing water (low viscosity, normal temperature), and the small-to-medium flow water purification demand of food processing production lines and point-of-use water supply. Under the standard operating condition of 25℃ (mainstream food processing water temperature) and 0.2MPa inlet pressure, the initial pure water flux of a single 10-inch cartridge reaches 10-35 L/min; for actual food processing raw water (tap water/well water) with different impurity contents, the stable operating flux remains at a high and consistent level of 8-30 L/min per cartridge, unaffected by the normal range of raw water turbidity and impurity content. The deep gradient filter structure effectively delays flux attenuation during continuous filtration, and the flux remains stable in the middle and late stages of use. Even with the gradual accumulation of intercepted insoluble impurities, there is no sudden drop in flux, avoiding the reduction of water supply efficiency of food processing point-of-use water purification systems caused by excessive flux attenuation. In addition, the flux design fully considers the parallel use characteristics in medium-flow food processing water purification systems, and multiple 10-inch cartridges can be used in parallel without mutual interference, which can flexibly expand the total water purification flow to meet the medium-flow water demand of food workshop production and multi-equipment simultaneous water supply.

As a food-grade physical deep filtration component based on the pore size interception principle, this 10-inch PP winded filter cartridge is designed to remove insoluble solid impurities in food processing water, and does not have the functional design of desalination, ion removal, or separation of dissolved substances (including mineral ions, soluble inorganic salts, and trace beneficial substances in water). Therefore, its salt rejection rate is 0% under all normal food processing water purification operating conditions. It only intercepts suspended solids, colloidal substances, sediment, rust particles and other insoluble contaminants in raw water during deep filtration, and will not retain any soluble components in food processing water—including calcium and magnesium mineral ions, trace potassium and sodium ions, and soluble inorganic salts that meet national drinking water standards. This characteristic is crucial for food processing water purification: it ensures that the mineral composition, pH value, and physical and chemical indicators of food processing water remain completely unchanged after purification, complying with the strict water quality requirements of different food production processes, and avoiding the loss of soluble mineral components that may affect the taste and quality of food products (such as beverage, dairy, and pastry products). At the same time, the 0% salt rejection rate makes the cartridge not affected by the total dissolved solids (TDS) content and ion type of food processing raw water, and can be universally applied to the purification of tap water, well water, and other raw water sources for food processing with different TDS values.

The pressure drop design of this 10-inch deep filtration PP winded filter cartridge is fully optimized for the 10-inch standard specification, the rated working pressure of 10-inch food-grade filter housings, the low-energy production requirements of the food processing industry, and the normal water supply pressure of food production lines (0.1-0.3MPa). It is designed to ensure safe, stable and low-consumption water purification operation without bringing additional pressure load to the food processing water supply pipeline and booster pump equipment. Under the standard operating condition of 25℃ and initial operation state (no impurity accumulation), the initial pressure drop of a single 10-inch cartridge is strictly controlled within 0.01-0.04 MPa, which is far lower than the rated pressure loss of mainstream 10-inch food-grade filter housings and food processing water supply systems. This ultra-low initial pressure drop ensures that the food processing water supply system can operate under normal water pressure without an additional booster pump in most cases, effectively reducing the energy consumption and equipment investment of the water purification link, and avoiding the damage of pipeline components caused by excessive pressure, which is in line with the energy-saving and emission-reduction requirements of modern small and medium-sized food processing enterprises. With the progress of continuous deep filtration and the gradual accumulation of intercepted insoluble impurities in the multi-layer filter structure, the pressure drop of the cartridge will increase steadily. The recommended maximum allowable pressure drop for food processing water purification is 0.20 MPa, which is the critical pressure value for the 10-inch filter housing system to maintain safe and stable water supply, avoid water leakage and ensure the normal water demand of food processing production lines. When the pressure drop reaches this value, the cartridge needs to be replaced in a timely manner, which not only ensures the deep purification effect of food processing water, but also prevents the water supply pressure of the production line from being too low and affecting the normal progress of food processing production.

Combined with the filtration precision range, 10-inch standard specification, food-grade safety design and actual deep purification demand of food processing water, the molecular weight cutoff (MWCO) of this filter cartridge is set at 50,000 – 500,000 Da, and the MWCO grade is precisely matched with the filtration precision and multi-layer deep gradient filter structure to realize targeted graded interception of macromolecular insoluble impurities in food processing raw water without intercepting small molecular weight soluble substances and water molecules. The 5 μm high-precision cartridge with MWCO of 50,000 – 200,000 Da can effectively intercept small molecular weight colloidal impurities, fine macromolecular suspended solids and organic particle aggregates in high-purity food processing water, ensuring the high clarity and purity of the purified water and meeting the water quality requirements of fine food production such as beverage and dairy product preparation. The 10 μm cartridge with MWCO of 200,000 – 300,000 Da is used for conventional high-purity food processing water purification, removing micro suspended solids and colloidal substances in raw water to meet the water quality needs of edible oil refining and pastry production. The 20 μm and 30 μm medium-precision cartridges with MWCO of 300,000 – 500,000 Da can efficiently remove large molecular weight insoluble contaminants such as bulk suspended solids, sediment, rust particle aggregates and fiber debris in general food processing raw water. This graded MWCO design combined with multi-layer deep filtration not only ensures the efficient and thorough removal of harmful insoluble impurities in food processing water during deep purification, but also allows all small molecular weight soluble components (mineral ions, water molecules) and beneficial trace substances to pass through the filter layer smoothly, maximizing the retention of the original water quality characteristics of food processing raw water. At the same time, the high-purity food-grade PP raw material and deep gradient winding process ensure that the MWCO parameters remain stable without attenuation during the service cycle, even under long-term immersion in water, ensuring the consistent and stable deep purification effect of the food processing water purification system.

Aiming at the 10-inch standard specification, food safety requirements of the food processing industry, the multi-layer deep filtration characteristics, and the continuous water purification demand of food processing raw water, the filter layer (wound food-grade PP wire layer) thickness of this 10-inch deep filtration PP winded filter cartridge is specially designed as 4-10 mm with graded specifications based on filtration precision, and the total wall thickness of the cartridge (including food-grade porous PP inner core, multi-layer deep gradient filter layer and food-grade smooth anti-scaling outer protective layer) is 9-18 mm, fully complying with the dimensional standard of 10-inch food-grade filter cartridges to ensure perfect installation compatibility with all mainstream 10-inch food-grade filter housings (PP, 304/316L stainless steel). The thin filter layer (4-6 mm) is matched with the 5 μm/10 μm high-precision cartridges for high-purity food processing water purification, which adopts a dense multi-layer gradient structure to ensure high filtration precision and excellent water permeability under normal operating conditions, avoiding excessive flow resistance caused by overly thick filter layer and affecting the water supply efficiency of high-purity water purification systems. The thickened filter layer (7-10 mm) is applied to the 20 μm/30 μm medium-precision cartridges for general food processing water purification, with a loose and porous multi-layer gradient structure that provides a larger three-dimensional dirt-holding space, realizes graded interception of different particle size impurities, delays impurity blockage, extends the service cycle of the cartridge, and reduces the replacement frequency under general water purification conditions. The food-grade porous PP inner core with optimized thickness (3-4 mm) has high compressive strength and uniform water permeability, which provides a stable and non-deformable supporting structure for the outer multi-layer filter layer under the working pressure of the 10-inch filter housing system, avoiding the deformation or collapse of the inner core and ensuring the overall structural stability of the 10-inch cartridge. The food-grade smooth anti-scaling outer protective layer (0.5-0.8 mm) is made of modified high-purity food-grade PP material, with anti-scaling and anti-corrosion performance, effectively preventing the filter layer from being scoured and damaged by water flow during continuous water purification, avoiding the shedding of PP wire particles to ensure food processing water safety, and preventing scale deposition on the cartridge surface caused by long-term contact with water, which is easy to clean and maintain before use, complying with the hygiene control norms of the food processing industry.

The replacement cycle of this 10-inch deep filtration PP winded filter cartridge is determined according to the filtration precision specification, food processing water purification link (high-purity/general), raw water impurity content (turbidity), and the continuous water supply load of the food processing water purification system, with strict compliance with food safety and hygiene norms and strong on-site operability for small and medium-sized food processing enterprises. Under the conventional working condition (25℃, continuous water supply for 8-12 hours a day, raw water turbidity <10 NTU, matching the rated flow of 10-inch filter housings), the recommended replacement cycle for a single 10-inch cartridge is differentiated by filtration precision: for high-purity food processing water purification (5 μm/10 μm), the high-precision cartridges have a replacement cycle of 3-4 weeks due to dense filter structure and fast accumulation of micro impurities; for general food processing water purification (20 μm/30 μm), the medium-precision cartridges have a longer replacement cycle of 4-6 weeks with larger dirt-holding capacity and graded impurity interception design. If the food processing water purification system is in 24-hour continuous water supply operation (for food production lines with uninterrupted production), or the raw water turbidity is higher than 10 NTU (such as well water in rainy seasons), the replacement cycle of all specifications of cartridges will be uniformly shortened to 2-4 weeks—continuous high-flow water supply and high raw water turbidity will accelerate the accumulation of impurities in the multi-layer filter structure, and timely replacement can avoid the reduction of water purification effect, the clogging of water supply pipelines and processing equipment, and the risk of microbial breeding caused by long-term use of the cartridge in water-soaked conditions, which is in strict compliance with the food safety and hygiene control requirements of the food processing industry. In addition, the replacement cycle needs to be adjusted according to the actual operating parameters of the 10-inch water purification system: if the pressure drop of the filter housing system reaches the recommended maximum value of 0.20 MPa in advance, or the water purification effect is significantly reduced (purified water has obvious turbidity, sediment or visible impurities), the cartridge should be replaced immediately regardless of the operating time, to ensure the consistent purification quality of food processing water and the normal water supply of food production lines.

In summary, this 10-inch deep filtration PP winded filter cartridge is a highly targeted, food-safe and high-performance water purification product developed for the small-to-medium flow water purification demand of the food processing industry, and a customized filtration solution for small and medium-sized food processing enterprises pursuing high food safety standards, stable water purification performance and cost-effectiveness. It perfectly combines the advantages of 10-inch standard specification compatibility, food-grade safety compliance, multi-layer deep gradient filtration performance, retention of original water quality characteristics and low energy consumption, solving the industry pain points of non-standard filter cartridges with poor compatibility, single-layer filtration with low dirt-holding capacity, and non-food-grade cartridges failing to meet food processing water safety norms. Its 10-inch standard design realizes perfect compatibility with mainstream food-grade filter housings, realizing direct plug-and-play, reducing the pipeline transformation and equipment investment cost of food processing enterprises, and perfectly matching the small-to-medium flow water purification demand of food production lines and point-of-use water supply systems. The high-purity food-grade PP raw materials complying with international and national standards completely eliminate the risk of secondary pollution to food processing water, complying with the most important core demand of the food processing industry for food safety and hygiene control. Its multi-layer deep gradient filtration structure achieves graded interception of different particle size impurities in food processing raw water, with high filtration efficiency, large dirt-holding capacity and delayed flux attenuation, which can efficiently and thoroughly remove insoluble impurities such as suspended solids, colloidal substances and sediment, avoid clogging of water supply pipelines and processing equipment, reduce the impurity load of subsequent water treatment links, and ensure the purified water meets the national food processing water quality standards and the differentiated water quality requirements of different food processing processes. Most importantly, the product only removes insoluble impurities without changing the original physical and chemical indicators and mineral composition of water, maximizing the retention of the original water quality characteristics of food processing raw water, which is crucial for maintaining the taste and quality of food products, especially fine food products such as beverages and dairy products. With the advantages of wide adaptability to raw water quality, reinforced structural stability, easy installation and maintenance, low energy consumption and high cost-effectiveness, it effectively improves the water supply efficiency of food processing water purification systems, reduces the operation and maintenance cost of water purification equipment, and meets the production needs of small and medium-sized food processing enterprises with different raw water sources and water purification demands, complying with the energy-saving, emission-reduction and green production requirements of the food industry. As an indispensable core 10-inch food-grade water purification component for the food processing industry, this product adapts to the development trend of the food processing industry towards high food safety standards, refinement and small-to-medium scale intensive production, and its excellent deep filtration performance, strict food safety compliance, perfect standard specification compatibility and high cost-effectiveness make it have a wide and stable application prospect in the global food and beverage processing industry. With the continuous improvement of national food safety standards and consumer demand for high-quality and safe food products, the market demand for such high-quality food-grade water purification filter cartridges will continue to increase, and it will become the first choice for small and medium-sized food processing enterprises, food workshops and bakery shops in the water purification and impurity removal link of food processing raw water.