PP Polypropylene/Cotton/String Wound Sediment Filter Cartridge for Pre Filter

We pay attention to product quality, focus on customer experience, and is one of the most outstanding companies in the domestic and foreign Pleated SS Oil Filter, PALL High Pressure Oil Filter, Customize Stainless Steel Hydraulic Oil Filter industry. Customers trust us because of high quality products and service and reasonable prices. With the tenet of 'quality and customer first', we warmly welcome all the friends to do business with us. Please do not hesitate to contact us. We hope to create products with key technologies, occupy the technological high ground in the industry, enhance our core competitiveness, and push the company to become bigger and stronger. We adjust our business structure, promote transformation and upgrading, strive to achieve high-quality, sustainable development, and continue to create new brilliant results.

The PP String Wound Filter Cartridge is a precision-engineered depth filtration solution designed for removing suspended solids, sediments, and particulate contaminants from liquids across a wide range of industrial and commercial applications . Constructed from high-quality polypropylene (PP) fibers, this cartridge offers an exceptional balance of filtration efficiency, dirt-holding capacity, and chemical compatibility.

Unlike surface-type filters, the PP String Wound Filter Cartridge features a unique graded pore structure created by precision-winding continuous PP yarn around a porous core . The outer layers are relatively loose, capturing larger particles, while the inner layers become progressively tighter, trapping finer contaminants. This "outside-to-inside" density gradient provides true depth filtration, allowing the cartridge to retain significant amounts of contaminant throughout its entire cross-section

This is the standard specification of the pp string wound filter cartridge.Feel free to contact us for a quote.

• True Depth Filtration: The graded pore structure (loose outer layers, tight inner layers) captures particles throughout the cartridge depth, not just on the surface, providing superior dirt-holding capacity and extended service life .
• High Structural Strength: The continuous winding process creates a robust, rigid cartridge that resists deformation under high flow rates and pressure differentials .
• Gradient Pore Size: The "outside loose, inside tight" structure effectively removes particles of varying sizes, from large sediments to fine particulates, in a single pass .
• No Media Migration: High-quality PP yarn and precision winding minimize fiber shedding, ensuring filtrate purity .

Huahang Filter is a high-tech private enterprise specializing in the production of all kinds of filter equipment and filter materials. The products are widely applicable to the filtration of liquids and gases in the fields of medicine, electronics, chemical industry, machinery, petroleum, automobile, environmental protection and so on.

• The company specializes in the production of a variety of stainless steel filter research and development and production management, thus accumulated a large number of production practice experience, for the enterprise product quality laid a good foundation.
• Rigorous Quality Control at Every Stage: Quality is not an afterthought at Huahang-it is built into every process. From incoming raw material inspection (PP yarn, core materials, adhesives) to in-process monitoring of winding tension and density, and final dimensional and pressure testing, we maintain strict quality control at every stage.
• Strategic Material Sourcing for Optimal Performance: Huahang maintains strong partnerships with leading global suppliers of filter media and raw materials. By controlling our supply chain, we ensure consistent material quality while optimizing costs for our customers .
• Flexible Production Scaling from Prototype to Mass Production: Whether you need a single prototype for testing, a small batch for pilot runs, or high-volume production for ongoing OEM requirements, Huahang's manufacturing capabilities scale to meet your needs. Our flexible production setup allows us to efficiently handle both low-volume custom orders and large-scale manufacturing without compromising lead times or quality .
• Certified Compliance with International Standards: Huahang Filter is committed to manufacturing products that meet or exceed international industry standards. Our production processes and quality management systems are designed to comply with relevant ISO standards, ensuring that every PP String Wound Filter Cartridge delivers reliable, consistent performance.
• Customer-Centric Approach with Responsive Service: At Huahang, we believe that great products must be backed by great service. Our customer support team provides prompt responses to inquiries, transparent communication throughout the order process, and proactive solutions to any challenges that arise. We measure our success by your satisfaction and long-term partnership.

Q1: What is the difference between a string wound filter and a melt-blown filter?
A: String wound filters are manufactured by winding continuous yarn around a porous core, creating a graded density structure from outside to inside . Melt-blown filters are formed by melting polypropylene and blowing microfibers onto a core. String wound filters typically offer higher structural strength and can withstand higher pressure differentials, while melt-blown filters may offer slightly higher efficiency for some applications .

Q2: Can PP string wound filter cartridges be cleaned and reused?
A: No, these cartridges are not recommended for cleaning and reuse . Backwashing or mechanical cleaning can damage the precision-wound fiber structure, disrupting the graded pore architecture and creating pathways for contaminants to bypass. They are designed as cost-effective, disposable depth filters. When the pressure drop reaches the recommended change-out value (typically 0.1-0.2 MPa), the cartridge should be replaced .

Q3: How long does a PP string wound filter cartridge last?
A: Service life depends on the feed water quality and the amount of contaminants present. In typical applications, replacement is needed every 1-3 months . The most reliable indicator is monitoring the differential pressure across the filter. Replace the cartridge when the pressure drop reaches 0.1-0.2 MPa (15-30 psi) above the initial clean pressure drop .

Q4: What filtration ratings are available?
A: PP string wound filter cartridges are available in a wide range of micron ratings, typically from 1μm (very fine) up to 100μm (coarse) . Common ratings include 1μm, 5μm, 10μm, 20μm, 25μm, 30μm, 50μm, 75μm, and 100μm. The choice depends on the particle size you need to remove and the requirements of your downstream processes.

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Reasonable Value and Efficient Service' for PP Polypropylene/Cotton/String Wound Sediment Filter Cartridge for Pre Filter. We vigorously attract excellent management and operation talents to our operation work, and constantly improve our management personnel structure. Our company in line with the quality is the life of the enterprise, we constantly improve the company's services in the development, improve the company's competitiveness in an all-round way and make our company a business card in the field.

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