FHLF String-Wound Filter Cartridge
The FHLF String-Wound Filter Cartridge is a depth filtration element specifically designed for the clarification of low-viscosity liquids with moderate contaminant loads. Manufactured by precisely winding special yarns (polypropylene or cotton) onto a porous core (polypropylene or stainless steel), it features a unique graduated density structure. This structure progresses from coarse outer layers (20-100μm) to fine inner layers (1-10μm), effectively trapping suspended solids, rust, and micro-particles within the matrix while maintaining a high dirt-holding capacity.
FHLF High-Flow Capacity String-Wound Filter Cartridge
The FHLF String-Wound Filter Cartridge is a depth filtration element specifically designed for the clarification of low-viscosity liquids with moderate contaminant loads. Manufactured by precisely winding special yarns (polypropylene or cotton) onto a porous core (polypropylene or stainless steel), it features a unique graduated density structure. This structure progresses from coarse outer layers (20-100μm) to fine inner layers (1-10μm), effectively trapping suspended solids, rust, and micro-particles within the matrix while maintaining a high dirt-holding capacity.
Product Features
- Graded Density Design: The “outer coarse, inner fine” structure maximizes dirt-holding capacity and prevents surface fromblinding, ensuring a longer service life.
- High Flow Capacity: Optimized winding technology provides a large effective filtration area (≥0.3 m² per 10″) and low initial pressure drop.
- Material Versatility: Available with PP or 304/316L stainless steel cores to suit various chemical and temperature requirements.
- Robust Construction: High-tensile yarns are tightly wound to prevent unraveling and ensure structural integrity under flow conditions.
- Cost-Effective: Economical solution for industrial pre-filtration and clarifying applications.
Product Parameters
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Parameters |
Specification |
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Length(inch/mm） |
10(254) |
20(508) |
30(762) |
40(1016) |
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Specifications |
String-Wound |
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Connection |
Plain End Type/222 Insert |
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Filtration Accuracy (μm) |
1/5/10/20/30/50/75/100 |
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Diameter (mm) |
Outer Diameter: 60–64 ; Inner Diameter: 28–30 |
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Filtering Area (m²/10″) |
≧0.3 |
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Design Pressure (MPa) |
0.5 |
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Maximum Temperature (℃) |
60 |
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Precautions
Selection & Operation Guide
- Filtration Accuracy Selection:
- Coarse Filtration (20-100μm): Ideal for removing sand, rust, and large suspended solids (Dirt-holding capacity >5g/m²).
- Fine Filtration (1-5μm): Recommended for removing colloids and micro-particles. Note: Must be used downstream of pre-filtration to avoid premature clogging.
- Material Compatibility:
- Polypropylene (PP): Suitable for pH 1-13. Avoid strong oxidizing acids (pH<2).
- Glass Fiber / Cotton: Consult chemical compatibility chart for aggressive solvents.
- Temperature & Sterilization:
- PP cores are not steam sterilizable. Stainless steel cores can withstand steam sterilization (SIP) at ≤120°C.
- Flow Direction: Strictly Inside-Out or Outside-In depending on the winding direction (typically Inside-Out for standard string-wound to prevent outer layer erosion). Please confirm with manufacturer.
Maintenance & Replacement
- Non-Regenerable: The FHLF filter cartridge is a disposable element. Do not attempt to backwash or clean the cartridge, as this will destroy the winding structure and release captured contaminants.
- Replacement Criteria:
- When the pressure differential (ΔP) reaches 0.1 MPa (or 0.3 MPa as per specific system design).
- When the flow rate drops significantly (typically 30% reduction).
- Pre-Filtration Strategy: In high-sediment applications, install a 20-50μm bag filter or pre-filter to extend the life of the FHLF cartridge.
*For specialized applications or customized solutions, please contact FFM Inc. directly.
