This deep filtration PP wound filter cartridge is a specialized high-efficiency filtration component engineered for the thorough impurity removal of landscape water, swimming pool water and aquaculture water, designed to adapt to the unique water quality characteristics and filtration demands of these open and semi-open water systems. Crafted from high-purity polypropylene (PP) resin via a precision multi-layer spiral winding process on a sturdy rigid PP inner support core, it forms a dense three-dimensional deep filtration structure with gradient pore size distribution from the outside to the inside. Unlike conventional surface filtration cartridges, this product achieves deep interception of impurities—capturing particulates not only on the surface but also within the internal filtration layer, which greatly enhances impurity holding capacity and filtration efficiency. It is free of adhesives, toxic additives and heavy metals, ensuring no secondary pollution to the water body and complying with the environmental and aquatic safety requirements of landscape, swimming pool and aquaculture scenarios. Compatible with standard 10/20/30/40-inch industrial filter housings with single and multi-core designs, it features easy installation, simple maintenance and stable structural performance under continuous operation, serving as a core filtration component for purifying non-potable water systems and improving water clarity, hygiene and ecological quality.

Tailored to the impurity types and particle size characteristics of landscape water, swimming pool water and aquaculture water, the filtration precision of this deep filtration PP wound filter cartridge is available in industry-adapted specifications of 20 μm, 30 μm, 50 μm, 80 μm and 100 μm, with 30 μm and 50 μm being the most commonly used standard specifications for comprehensive deep filtration. This precision range is scientifically designed to target the main harmful impurities in these water bodies, including suspended silt, algae particles, organic debris, hair and fiber impurities in swimming pool water, feed residues and aquatic animal excrements in aquaculture water, as well as dust and sediment accumulated in landscape water. The gradient pore size deep filtration structure ensures that impurities of different particle sizes are intercepted step by step in different layers of the cartridge, avoiding rapid surface blockage and realizing efficient and sustainable deep impurity removal, which perfectly balances filtration efficiency and water flow demand for open water systems.

Under the standard operating conditions of 25℃ ambient temperature and 0.2MPa inlet pressure, the nominal flux of this deep filtration PP wound filter cartridge is customized according to its specification to meet the large-flow filtration demands of landscape, swimming pool and aquaculture water systems: the 10-inch model reaches 12-20 L/min, 20-inch model 25-35 L/min, 30-inch model 45-60 L/min and 40-inch model 70-90 L/min. For the same specification, the flux varies slightly with filtration precision: the 20 μm and 30 μm high-precision models have a slightly lower flux, while the 50 μm, 80 μm and 100 μm models feature a higher and more stable large flux. The ultra-large flux design is fully adapted to the high water volume and continuous circulation filtration characteristics of swimming pools, large landscape water bodies and aquaculture ponds, ensuring sufficient water circulation and supply while maintaining efficient deep impurity removal, and avoiding the problem of low filtration efficiency caused by insufficient flux in large-scale water circulation systems.

As a physical deep filtration component dedicated to removing insoluble particulate impurities from landscape water, swimming pool water and aquaculture water, this PP wound filter cartridge is only designed for particle size-based interception of solid contaminants and has no ion separation, desalination or salt rejection functional design. Therefore, it has no salt rejection rate index. All dissolved inorganic salts, mineral ions, water treatment agent components (such as swimming pool disinfectants and aquaculture water regulators) and small molecule soluble substances in the water can pass through the cartridge body smoothly. This functional positioning is highly consistent with the core demand of filtration for these non-potable water systems—removing harmful particulates without changing the soluble ion composition and chemical balance of the water body, ensuring the normal growth of aquatic organisms in aquaculture water and the stable effect of water treatment agents in swimming pool and landscape water.

The initial pressure drop of a new deep filtration PP wound filter cartridge under the standard nominal flux and 25℃ operating temperature is ≤0.035MPa for all specifications, which is far lower than the pressure drop limit of landscape, swimming pool and aquaculture water circulation filtration systems, ensuring minimal pressure loss in the water circulation link and reducing the energy consumption of water circulation pumps. With the continuous operation of the filtration system, as impurities are deeply intercepted and accumulated in the internal and surface layers of the cartridge body, the pressure drop will gradually rise in a slow and stable manner (a unique advantage of deep filtration structure over surface filtration). The recommended maximum operating pressure drop of this cartridge is 0.2MPa for all specifications; when the pressure drop reaches this value, the cartridge must be cleaned or replaced in time to avoid excessive pressure loss in the water circulation system, which will lead to reduced water circulation speed, decreased filtration efficiency and increased energy consumption of circulation pumps.

This deep filtration PP wound filter cartridge adopts a pure physical filtration mechanism based on particle size interception, with its core filtration principle focusing on the physical capture of solid particulates of specific sizes rather than the separation of substances according to molecular weight and molecular size—this is fundamentally different from ultrafiltration, nanofiltration and reverse osmosis membrane components with MWCO characteristics. Therefore, it has no specific Molecular Weight Cutoff (MWCO) index. Its interception effect is only aimed at insoluble solid particulate impurities with particle sizes larger than its set filtration precision; macromolecular organic substances, soluble colloids and other dissolved macromolecular substances in landscape, swimming pool and aquaculture water can pass through the cartridge body smoothly as long as their actual particle size is smaller than the filtration precision, which fully meets the filtration demand of non-potable water systems that only need to remove particulate impurities without separating dissolved macromolecular substances.

The effective PP deep filtration layer thickness of this filter cartridge is specially thickened and optimized according to its specification and the deep filtration demand, with the 10-inch model at 8-12mm, 20-inch model at 12-16mm, 30-inch model at 16-20mm and 40-inch model at 20-25mm—all thicker than conventional PP wound filter cartridges. The total outer diameter of all specifications is the industry standard 70mm/90mm, perfectly matching the internal size of standard large-flow filter housings for landscape, swimming pool and aquaculture water systems. The ultra-thick effective filtration layer is the core of the deep filtration structure, which not only provides an ultra-large impurity holding capacity to delay the rise of pressure drop and greatly reduce the frequency of cleaning and replacement, but also forms a multi-layer gradient pore size filtration structure to intercept impurities of different particle sizes step by step in different layers, realizing the true deep filtration of the water body. The inner support core is made of high-strength rigid PP material with a thickness of 4-6mm (matching the specification), with a honeycomb reinforced structure, which can withstand the operating pressure of 0.8MPa without deformation or rupture, fully adapting to the pressure fluctuation characteristics of water circulation systems during continuous operation.

The recommended replacement cycle of this deep filtration PP wound filter cartridge is determined by its specification and the actual water quality and impurity content of the application scenario: for 10/20-inch models used in small landscape water bodies (residential community flower ponds, small swimming pools) and small-scale aquaculture tanks, the standard replacement cycle is 3-5 months; for 30/40-inch models applied in large landscape water bodies (urban parks, commercial plazas), large swimming pools (gyms, public aquatic centers) and large-scale aquaculture ponds (fish/shrimp/crab breeding bases), the standard cycle is 4-8 months. The actual replacement cycle is closely related to the impurity content and water circulation frequency: for aquaculture water with high feed residue and excrement content, and swimming pool water with high passenger flow, the cycle is shortened by 1-2 months; for landscape water with low human interference and relatively clean water quality, the cycle can be appropriately extended. In addition, the deep filtration structure supports repeated physical backwashing with clean water or low-pressure air, which can remove most of the accumulated impurities and extend the replacement cycle of the cartridge by 1-3 months under the premise of ensuring filtration efficiency. Once the system pressure drop reaches 0.2MPa, the cartridge must be replaced immediately regardless of the actual use time to ensure the normal operation of the water circulation filtration system.

This deep filtration PP wound filter cartridge has a number of professional performance features adapted to the filtration demands of landscape water, swimming pool water and aquaculture water: 1. Gradient pore size deep filtration structure: Unique multi-layer spiral winding with gradient pore size distribution from outside to inside realizes deep interception of impurities, avoiding rapid surface blockage and improving impurity holding capacity by more than 50% compared with conventional surface filtration cartridges; 2. High-purity food-grade PP raw material: Adopts 100% high-purity PP resin complying with aquatic safety standards, free of toxic additives, heavy metals and adhesives, no harmful substance dissolution in water, ensuring no secondary pollution to aquatic organisms and the environment; 3. Ultra-large impurity holding capacity: Ultra-thick effective filtration layer and three-dimensional deep filtration structure provide super large impurity storage space, effectively delaying the rise of pressure drop and reducing the frequency of cleaning and replacement, saving operation and maintenance costs; 4. High pressure resistance and structural stability: Honeycomb reinforced high-strength PP inner support core can withstand 0.8MPa operating pressure and pressure fluctuations in water circulation systems, no deformation, rupture or delamination during long-term continuous operation; 5. Large flux with low resistance: Optimized internal flow channel design and gradient pore size structure ensure ultra-large flux and low initial pressure drop, adapting to the large-flow circulation filtration demand of open water systems and reducing the energy consumption of circulation pumps; 6. Backwashable and reusable: The rigid and dense deep filtration structure supports repeated physical backwashing with clean water or low-pressure air, which can remove most accumulated impurities and extend the service life of the cartridge; 7. Strong chemical compatibility: Resistant to most common water treatment agents (such as chlorine-containing disinfectants, algaecides, aquaculture regulators), acid and alkali resistant in the pH range of 2-12, adapting to the chemical characteristics of treated water with added water treatment agents; 8. Standard compatibility & easy maintenance: Matches all industry standard 10/20/30/40-inch filter housings (PP plastic/304 stainless steel) with single/multi-core designs, unified installation specifications, easy disassembly and replacement, no need for professional tools, suitable for large-scale application in various scenarios.

This deep filtration PP wound filter cartridge is a dedicated filtration component for impurity removal of landscape water, swimming pool water and aquaculture water, and its core application fields cover all open and semi-open non-potable water systems that require efficient deep filtration and water quality improvement: 1. Landscape water purification: Applied to the circulation filtration system of urban park lakes, commercial plaza fountain water, residential community flower ponds and green belt landscape water, removing silt, algae and organic debris, improving water clarity and maintaining the aesthetic effect of landscape water; 2. Swimming pool water filtration: Used in the core filtration link of public swimming pools, gym aquatic centers, hotel and community swimming pools, removing hair, fiber, human skin debris and suspended particulates, matching with disinfectants to improve water hygiene and meet swimming pool water quality standards; 3. Aquaculture water purification: Applied to the circulation filtration system of freshwater and seawater aquaculture ponds (fish, shrimp, crab, shellfish breeding), aquaculture tanks and recirculating aquaculture systems (RAS), removing feed residues, aquatic animal excrements and suspended silt, improving water dissolved oxygen and ecological environment, and promoting the healthy growth of aquatic organisms; 4. Artificial lake and reservoir auxiliary filtration: Used in the auxiliary circulation filtration system of urban artificial lakes and small reservoirs for ecological landscape, removing surface suspended impurities and improving water quality and ecological stability; 5. Water park water filtration: Applied to the circulation filtration system of water parks, water playgrounds and spray facilities, removing various suspended particulates in water, ensuring the cleanliness and safety of recreational water and reducing the risk of waterborne diseases; 6. Aquarium and water feature filtration: Used in the filtration system of large aquariums, marine parks and indoor water features, removing fine suspended particulates in water, improving water clarity and ensuring the living environment of ornamental aquatic organisms; 7. Agricultural irrigation auxiliary filtration: Applied to the auxiliary filtration system of agricultural drip irrigation and sprinkler irrigation water for ecological agriculture and ornamental plant planting, removing large particulate impurities and preventing pipeline blockage while ensuring the water quality demand of plants.

In summary, this deep filtration PP wound filter cartridge is a high-performance, professional specialized filtration component specially developed for the impurity removal of landscape water, swimming pool water and aquaculture water, and is an indispensable core filtration product for optimizing the water quality of open and semi-open non-potable water systems. Its design is fully tailored to the unique filtration demands and water quality characteristics of these scenarios: the unique gradient pore size deep filtration structure breaks through the limitation of conventional surface filtration, realizes deep interception of impurities and greatly improves impurity holding capacity and filtration sustainability, avoiding the problem of rapid blockage in large-flow circulation filtration. Made of 100% high-purity PP resin with an adhesive-free winding process, it ensures no secondary pollution to the water body and complies with aquatic safety and environmental protection standards, which is crucial for the healthy growth of aquatic organisms in aquaculture water and the ecological safety of landscape water. With the advantages of ultra-large flux, low initial pressure drop, high pressure resistance, strong chemical compatibility and backwashable performance, it perfectly adapts to the large-flow circulation, continuous operation and water treatment agent-added characteristics of landscape, swimming pool and aquaculture water systems, reducing the energy consumption and operation and maintenance costs of filtration systems. It is widely compatible with standard filter housings of various specifications, easy to install and maintain, and can efficiently remove various suspended particulate impurities in the water body, significantly improving water clarity, hygiene and ecological quality. As a dedicated deep filtration component for non-potable water systems, it plays a key role in maintaining the aesthetic effect of landscape water, ensuring the hygiene safety of swimming pool water and promoting the healthy development of aquaculture industry, and is the first choice for deep impurity removal of landscape water, swimming pool water and aquaculture water.

The matching related products of this deep filtration PP wound filter cartridge are all core components and supporting equipment of landscape water, swimming pool water and aquaculture water circulation filtration systems, forming a complete non-potable water deep purification product system: 1. High-flow melt-blown PP filter cartridges: High-flow melt-blown PP filter cartridges of 10/20/30/40-inch specifications, an alternative pre-filtration component for this deep filtration cartridge, suitable for coarse filtration of water with extremely high impurity content, reducing the filtration load of the deep filtration cartridge; 2. Large-flow industrial filter housings: 10/20/30/40-inch filter housings made of anti-corrosion PP plastic and 304/316 stainless steel with single/multi-core (2/4/6/8 core) designs, the special supporting equipment for this cartridge, adapted to the large-flow circulation filtration demand of open water systems; 3. Water circulation and booster equipment: Including large-flow centrifugal pumps, frequency conversion circulation pumps and pressure stabilizing tanks matching with landscape, swimming pool and aquaculture water systems, used with this cartridge to ensure stable water circulation speed and pressure; 4. Backwashing and cleaning equipment: Including high-pressure backwash pumps, air compressors, backwash pipelines and filter cartridge cleaning tanks, used for the physical backwashing of this deep filtration cartridge, removing accumulated impurities and extending its service life; 5. Water treatment agent matching products: Including chlorine-containing disinfectants, algaecides, flocculants and aquaculture water quality regulators, used with this cartridge to form a comprehensive water treatment solution, improving water quality and ecological stability; 6. Water quality monitoring instruments: Including turbidity meters, suspended solid detectors, pH meters and dissolved oxygen meters specially used for non-potable water systems, real-time monitoring of water quality and the operating status of the filter cartridge, facilitating timely maintenance and replacement; 7. Pipeline and filtration accessories: Including anti-corrosion silicone gaskets, stainless steel quick connectors, ball valves, Y-type coarse filters and filter cartridge pullers, used for the installation, sealing and primary coarse filtration of this cartridge and filter housings, protecting the filtration system and water circulation pipelines; 8. Same series PP wound filter cartridges: The acid and alkali resistant and high-flow PP wound filter cartridges of the same specifications, which can be replaced and used according to the different water quality characteristics of sub-scenarios (such as seawater aquaculture with high salt content), forming a diversified filtration product system for non-potable water; 9. Integrated water circulation filtration equipment: Integrated landscape water, swimming pool and aquaculture water circulation filtration machines equipped with this deep filtration cartridge, providing turnkey filtration solutions for small and medium-sized scenarios with easy installation and one-click operation.