Products Description
Our string wound polypropylene filter cartridge is made of high-purity polypropylene fiber through a precision gradient winding process to form a deep three-dimensional filtration network. It is designed to remove suspended particles, colloids, and sediments from liquids and is an ideal choice for industrial pretreatment, drinking water purification, and chemical treatment.
Technical parameters
| Parameter | Specification |
| Material | 100% Pure Polypropylene |
| Micron Rating | 0.5-150μm optional |
| Outside Diameter | 2 inch - 4 1/2 inch |
| Standard Lengths | 10″ / 20″ / 30″ / 40″ |
| Operating Temperature | Up to 82°C (180 °F) |
| Maximum Differential Pressure | 0.35 MPa (51 psi) @ 20 °C |
| Flow Rate | Up to 10 m³/h (44 gpm) per 10″ at ΔP ≤ 0.1 MPa |
| pH Range | 1 – 14 |
| End Caps & Core Options | 222/Flat/Fin, DOE/Flat/Fin, Open End |
| Media Configuration | Graded density, wound construction |
How it works
How Do String Wound Polypropylene Filter Cartridge Work?
Outer coarse filtration:
Loose fiber layer intercepts large particles to prevent surface clogging
Middle fine filtration:
Medium density layer captures medium particle size impurities
Inner fine filter barrier:
Tightly wound layer blocks fine particles to ensure water quality
Features
✅ The density increases from the outer layer to the inner layer, achieving a stepped interception.
✅ The winding structure provides a large number of flow channels with a small initial pressure drop.
✅ No adhesive, no fiber shedding.
✅ Standard size design, easy installation and disassembly.
✅ Manufactured according to ISO9001.
Applications
🏭 Industrial Manufacturing
Cooling water system pretreatment · Plating liquid purification · Machine tool cutting fluid circulation
Pain point solution: Extend RO membrane life and protect precision nozzles
💧 Water Treatment Engineering
Underground cement sand filtration · Municipal water supply pretreatment · Seawater desalination pretreatment
Customer benefits: Reduce backwash frequency and reduce flocculant dosage by 20%
🥫 Food and Beverage
Syrup filtration · Beverage clarification · CIP cleaning fluid recovery
Compliance guarantee: FDA certification, no dissolution risk
⚗️ Chemical Pharmaceuticals
Solvent filtration · API impurity removal · Acid and alkali liquid purification
Safety verification: Strong acid and alkali resistance, no fiber shedding risk
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Order information
In addition to providing standard string wound filter cartridges, we also support non-standard size/precision/end cap design.
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