How is filtration efficiency measured and rated for cartridge oil filters?- Hebei Zhengcan Filter Manufacturing Co. Ltd.

Filtration efficiency for cartridge oil filters is typically measured and rated based on their ability to capture and retain particles of various sizes from the engine oil. The following are common methods used for measuring and rating filtration efficiency:

Beta Ratio (β Ratio):

The Beta ratio is a widely used method for quantifying filtration efficiency. It is defined as the ratio of the number of particles of a certain size upstream of the filter to the number of particles of the same size downstream of the filter.

For example, a Beta ratio of 10 at a specific particle size indicates that the filter removes 90% of particles of that size.

Beta ratios are determined through laboratory testing using particle counting techniques, such as the ISO 16889 multi-pass test method.

Particle Size Efficiency (PSE):

Particle size efficiency refers to the ability of the filter to remove particles of specific sizes from the oil.

Filters may be rated based on their efficiency at capturing particles of various sizes, typically ranging from coarse to fine particles.

Common particle size ratings include ISO 4572 (absolute), ISO 16889 (nominal), and SAE J1858.

Efficiency Test Standards:

Various industry standards and test procedures are used to evaluate the filtration efficiency of cartridge oil filters.

The ISO 4548 series of standards provides guidelines for testing the filtration performance of filters for internal combustion engines.

The ISO 16889 standard specifies a multi-pass test method for determining the filtration efficiency and dirt-holding capacity of hydraulic fluid power filter elements.

Dirt-Holding Capacity:

In addition to filtration efficiency, cartridge oil filters may be rated based on their dirt-holding capacity, which refers to the amount of contaminants the filter can hold before reaching its maximum capacity.

Dirt-holding capacity is influenced by factors such as filter media type, surface area, and construction.

Performance Data Sheets:

Manufacturers typically provide performance data sheets or product specifications that include information on filtration efficiency, Beta ratios, particle size efficiency, and other relevant parameters.

These datasheets help users make informed decisions when selecting cartridge oil filters for specific applications.

Filtration efficiency for cartridge oil filters is determined through standardized testing methods and expressed using parameters such as Beta ratio, particle size efficiency, and dirt-holding capacity.