Depth filtration

Depth filtration is a highly effective filtration method that removes solid particles from liquids and gases by trapping them throughout the entire thickness of the filter media. Unlike surface filtration—where particles are retained only on the surface—depth filtration offers a three-dimensional structure that captures contaminants deep within the material.

This technique is especially suitable for liquids containing a wide range of particle sizes, such as water with both coarse and fine impurities. Thanks to the maze-like network of fibers within the filter media, a gradient retention structure is created: large particles are captured on the outside, while smaller particles are retained deeper inside the filter. This design results in longer service life, higher dirt-holding capacity, and a more consistent flow—making depth filtration extremely efficient.

Applications of Depth Filtration

• Depth filters are widely used across various industries:
• Water treatment: removal of organic compounds, suspended solids, and microorganisms
• Food and beverage: clarification of drinks, oils, and extracts
• Pharmaceutical industry: pre-filtration of process water and raw materials
• Chemical industry: removal of impurities from acids, solvents, and polymers

Van Borselen Filters offers various types of depth filters, tailored to specific applications:

1. Cellulose depth filters
– Available as filter sheets or modular cartridges
– Suitable for coarse to sterile filtration
– Common in the beverage, chemical, and pharmaceutical sectors

2. Synthetic meltblown cartridges
– Made from polypropylene, polyester, or nylon
– Available in nominal and absolute retention ratings (up to 99.98%)
– Compatible with single and multi-round filter housings

3. Filter sheets vs. modules
– Filter sheets are used in filter presses and ideal for large batch processes
– Modules are used in pressure filter housings and offer leak-free, quick-change operation

Why Choose Depth Filtration?

• High dirt-holding capacity
• Extended service life due to multi-layer retention
• Suitable for variable particle size distributions
• Cost-effective and highly efficient
• Minimal risk of breakthrough or bypass

Need Expert Advice?

Van Borselen Filters combines over 100 years of experience with a personal, solution-oriented approach. Whether you're selecting a new filter or optimizing an existing process, we're here to help. Contact us today for tailored advice and a competitive offer.