Sanitary Grade PP Wound Filter Cartridges: Pre-treatment Filter Cartridges for Pharmaceutical Water Purification
Product Introduction
These sanitary grade PP wound filter cartridges are specially engineered pre-treatment components for pharmaceutical water purification systems, crafted from high-purity polypropylene (PP) raw materials with a sanitary winding process that meets GMP and pharmaceutical industry hygiene standards. The integral structure features uniform winding of PP fiber yarn on a corrosion-resistant sanitary PP inner core, without the addition of any adhesives, binders or lubricants during production, ensuring zero secondary pollution to the filtered medium. Designed for the pre-treatment stage of pharmaceutical water purification, the cartridges effectively remove suspended solids, colloids, rust, sediment and other particulate impurities from raw water, protecting subsequent precision filtration, reverse osmosis and other core water treatment units, and laying a solid foundation for the production of pharmaceutical pure water and water for injection that complies with pharmacopoeia standards (USP, EP, CP).
Filtration Precision
The sanitary grade PP wound filter cartridges offer a wide range of precise filtration precision options tailored to pharmaceutical pre-treatment needs, with nominal filtration ratings available from 1 μm to 100 μm. The commonly used specifications for pharmaceutical water pre-treatment include 5 μm, 10 μm, 20 μm and 50 μm; the 1 μm and 3 μm high-precision models are applicable for fine pre-treatment of raw water with low turbidity, while the 50 μm and 100 μm models are used for coarse pre-treatment of raw water with high particulate content, all realizing accurate interception of particulate impurities of corresponding particle sizes with stable filtration efficiency.
Flux
The flux performance of these cartridges is optimized for the low-pressure and high-purity requirements of pharmaceutical water purification pre-treatment, with a typical pure water flux of 80-150 L/min·m² at 25℃ and 0.1MPa operating pressure. For the standard 10-inch cartridge (254mm length), the pure water flux is 10-20 L/min, and the 20-inch cartridge (508mm length) reaches 20-40 L/min; the flux will decrease moderately with the reduction of filtration precision and the increase of raw water turbidity, and the flux remains stable in the recommended operating pressure range without sudden attenuation, meeting the continuous water supply demand of pharmaceutical water purification systems.
Salt Rejection Rate
As a pre-treatment particulate filtration cartridge, the sanitary grade PP wound filter cartridge is not designed for desalination, and its salt rejection rate is close to 0%. It only intercepts insoluble particulate impurities and colloidal substances in water, and does not have the ability to remove soluble inorganic salts, organic salts and other ionic substances; the desalination function in the pharmaceutical water purification system is undertaken by subsequent reverse osmosis (RO), nanofiltration (NF) and other membrane separation units, and the cartridge’s core role is to reduce the pollution load of these desalination units and ensure their stable salt rejection efficiency.
Pressure Drop
The product features a low initial pressure drop design, with an initial pressure drop of ≤0.01MPa at 25℃ and the rated flux for all filtration precision specifications, which effectively reduces the energy consumption of the pharmaceutical water purification system’s water pump. With the progress of filtration, the pressure drop of the cartridge will gradually increase as the surface and internal interception of impurities increase; the recommended terminal pressure drop is ≤0.06MPa, and when the pressure drop exceeds this value, the cartridge needs to be cleaned or replaced in time to avoid excessive system pressure and affect the normal operation of subsequent equipment.
Molecular Weight Cutoff (MWCO)
The MWCO of the sanitary grade PP wound filter cartridges is 100,000 Da to 500,000 Da, which is matched with the filtration precision and winding density of the cartridge. This molecular weight cutoff range can effectively intercept macromolecular colloids, protein-like substances and macromolecular particulate impurities in pharmaceutical raw water, while allowing small molecular weight water molecules, inorganic salts and other soluble substances to pass through smoothly, avoiding the interception of effective components in water and ensuring the normal progress of subsequent desalination and purification processes.
Membrane Thickness
The effective filtration layer thickness of the PP wound filter cartridge is 3-8 mm, and the total thickness of the cartridge (including inner core and filtration layer) is 28-30 mm for the standard 10-inch/20-inch models, which is designed in accordance with the installation size of sanitary filter housings in the pharmaceutical industry. The multi-layer winding structure forms a gradient thickness filtration layer, with a looser structure on the outer layer for coarse interception and a denser structure on the inner layer for fine interception, which not only increases the dirt-holding capacity but also ensures the filtration precision, and the uniform thickness distribution avoids local excessive pressure and damage to the filtration layer.
Replacement Cycle
The replacement cycle of the cartridge is determined by the turbidity of the pharmaceutical raw water, operating flux and system pressure drop, with a recommended normal replacement cycle of 1-3 months for the pharmaceutical water purification pre-treatment stage. For raw water with low turbidity (≤5 NTU) and stable operating conditions, the replacement cycle can be appropriately extended to 3 months; for raw water with high turbidity (>5 NTU) or continuous 24-hour operation of the system, the replacement cycle is shortened to 1 month. In addition, when the terminal pressure drop of the cartridge exceeds 0.06MPa or the filtration flux drops by more than 30% of the initial value and cannot be recovered after cleaning, it needs to be replaced immediately to ensure the pre-treatment effect.
Features
- Sanitary and high-purity material: Made of food-grade and pharmaceutical-grade high-purity PP, free of heavy metals, plasticizers and other harmful substances, complying with USP Class VI and FDA 21 CFR 177.1520 standards, meeting the hygiene requirements of pharmaceutical water production.
- Adhesive-free structure: The winding process does not use any adhesives, avoiding the dissolution of adhesive components into the filtered water and ensuring the purity of pharmaceutical water.
- High dirt-holding capacity: The gradient winding structure and large effective filtration area significantly improve the dirt-holding capacity, reduce the frequency of replacement, and lower the operating cost of the system.
- Good chemical compatibility: Resistant to most inorganic acids, alkalis and organic solvents commonly used in the pharmaceutical industry, and can be used for the pre-treatment of various pharmaceutical raw water and cleaning solutions of water purification systems.
- Sanitary connection design: The end caps are made of sanitary PP material with a smooth sealing surface, matching the sanitary quick-connect filter housings in the pharmaceutical industry, realizing seamless connection and avoiding dead corners and microbial breeding.
- Wide operating temperature range: It can work stably in the temperature range of 0-60℃, adapting to the temperature change of raw water in different seasons and the normal operating temperature of pharmaceutical water purification systems.
- Easy to replace and dispose: The integral PP structure is non-toxic and harmless, and the discarded cartridges can be recycled or treated in accordance with general plastic waste, without environmental pollution.
Application Fields
These sanitary grade PP wound filter cartridges are mainly applied to the pre-treatment stage of pharmaceutical water purification systems, covering all pharmaceutical production fields that require pure water and water for injection, including: raw water pre-treatment of pharmaceutical pure water systems in chemical pharmaceutical, biological pharmaceutical, traditional Chinese medicine preparation and biotech drug production workshops; pre-filtration of water for injection (WFI) systems before reverse osmosis and distillation units; pre-treatment of cleaning water for pharmaceutical production equipment, pipelines and packaging materials; raw water pre-filtration of laboratory pure water systems in pharmaceutical R&D centers; pre-treatment of water for production in pharmaceutical auxiliary material and excipient production enterprises; in addition, it can also be used in the pre-treatment of high-purity water in the biopharmaceutical field such as vaccine, antibody and protein drug production, complying with the GMP management requirements of the pharmaceutical industry in all application scenarios.
Conclusion
In summary, the sanitary grade PP wound filter cartridges are the core pre-treatment components tailored for pharmaceutical water purification systems, with the advantages of sanitary material, precise filtration, low pressure drop, high dirt-holding capacity and good compatibility, which can effectively remove particulate impurities and colloids in raw water, protect the subsequent core purification units, and ensure the stable operation of the pharmaceutical water purification system and the compliance of the produced pure water and water for injection with pharmacopoeia standards. The product has a variety of filtration precision and specification options, which can be flexibly matched with different pharmaceutical water purification process requirements, and the simple replacement cycle and low operating cost make it an indispensable and cost-effective filtration product in the pharmaceutical water treatment industry.
Related products
- Sanitary Grade PP Melt Blown Filter Cartridges: For fine pre-treatment of pharmaceutical water, with higher filtration precision and better uniformity, suitable for the post-stage pre-treatment before precision filtration;
- Sanitary Grade Pleated Filter Cartridges (PP/PTFE/PES): Applied to the precision filtration stage of pharmaceutical water purification after pre-treatment, with high filtration efficiency and large flux, meeting the precision filtration requirements of pure water and water for injection;
- Sanitary Grade Activated Carbon Filter Cartridges: Used in conjunction with PP wound filter cartridges for the pre-treatment of pharmaceutical water, adsorbing organic matter, residual chlorine and odor in raw water, improving the water quality of raw water;
- Sanitary Grade Stainless Steel Filter Housings: Special matching filter housings for sanitary grade filter cartridges, complying with GMP standards, with smooth inner walls and no dead corners, suitable for the installation and use of filter cartridges in pharmaceutical water purification systems;
- Sanitary Grade Reverse Osmosis (RO) Membrane Elements: The core desalination component of pharmaceutical water purification systems, matched with PP wound filter cartridges for pre-treatment, realizing the desalination and high-purity purification of pharmaceutical water;
- Sanitary Grade Microfiltration (MF)/Ultrafiltration (UF) Membrane Modules: Used for the deep purification of pharmaceutical water after pre-treatment, intercepting microorganisms, macromolecular organic matter and other impurities, further improving the purity of pharmaceutical water.
