String Wound Cartridge Filter

Products Description String wound cartridge filter is a kind of depth filter cartridge, which is made of polypropylene, cotton, glass fiber and other textile fiber threads spirally wound on the porous skeleton, forming a gradient pore structure. It is sparse on the outside and dense on the...

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Products Description

The string wound cartridge filter consists of multiple fiber threads that are uniformly wound on a mandrel through a precise winding technique to form a multi-layer filtration structure. This structure provides a progressively larger pore structure that effectively filters a wide range of contaminants from large particles to microscopic particles. It is sparse on the outside and dense on the inside, which can realize multi-stage retention:

Physical interception: the outer layer captures large particles larger than 50μm, and the inner layer filters tiny impurities of 1-10μm.
Adsorption effect: the fiber surface adsorbs ultra-fine particles of 0.1-1μm with the help of electrostatic effect, the filtration efficiency is over 98%.
Differential pressure control: 10 inch standard cartridge under 0.15MPa, the flow rate is 1.2-2.5T/H, the initial differential pressure is only 0.02MPa.

Technical Highlights

1. Filter media

Material	Characteristics	Application Scenarios
Polypropylene (PP)	Oil-resistant, weak acid and alkali resistant, low cost	Food and beverage pre-filtration, industrial lubricant purification
Degreased cotton	High temperature resistant (≤120℃), good hydrophilicity	Pharmaceutical liquid clarification, wine filtration
Glass fiber	High temperature resistant (≤300℃), high precision (0.5μm)	Semiconductor ultrapure water, electronic grade solvent filtration
Ceramic fiber	Corrosion-resistant, anti-thermal shock	Iron and steel plant flue gas filtration , high temperature gas purification

2. Skeleton technology

Polypropylene (PP): lightweight design, applicable temperature ≤80℃, suitable for general industrial scenarios.
316L stainless steel: pressure resistance 0.5MPa, temperature resistance ≤180℃, suitable for high temperature and high pressure working conditions.
Titanium alloy: 3 times higher corrosion resistance, used in marine engineering and nuclear power field.

string-wound-cartridge-filter-skeleton

3. Structure Optimization

Gradient winding process: change the porosity gradient by controlling the winding tension to improve the dirt holding capacity.
Honeycomb structure: Specific surface area reaches 1200m²/m³, increasing filtration efficiency by 25%.
End cap sealing: ultrasonic welding or hot melt adhesive sealing, leakage rate ≤ 0.001%.

string-wound-cartridge-filter-structure

Applications

1. Food and Beverage Industry

Application Scenarios:

Mineral water: removing rust and sediment (5μm accuracy).
Beer: filtering yeast cells (3μm precision).
Cooking oil: decolorization pretreatment (20μm precision).

Case:

After an international beverage brand adopted a glass fiber string wound cartridge filter, the turbidity of the product was reduced from 1.5NTU to 0.2NTU, and the shelf life was extended by 6 months.

2. Semiconductor Manufacturing

Application Scenario: