Dust content in compressed air after 5-stage filtration

In the compressed air system, the dust content after 5-stage filtration is a key quality indicator, which directly affects the applicability of compressed air in industrial production. The following are professional solutions based on international standards and industry practice:

standard and dust content of 1. 5-stage filtration

according to the ISO 8573.1 international standard, the quality level of compressed air is passed. Dust content, oil content and pressure dew point(dry and wet degree) three indicators to divide. among them, dust content level the correspondence with the filter level is as follows:

attention: Some documents may associate "level 5" with oil content (e. g. oil content <25 mg/m & sup3;), but according to ISO 8573.1, the level 5 standard for dust content is clearly ≤40.0 mg/m&sup3;(particle size ≤ 40.0 μm).

2. detection methods and units

1. detection method:
   • compressed air test plate method: Blow with a dust gun for 30 seconds and observe the amount of residual dust.
   • dust particle counter: Directly measure the number of dust particles per unit volume with an accuracy of 0.1 μm.
   • Compressed air detector: Capture impurities through a special test diaphragm and observe the degree of pollution.
2. Dust unit:
   • mass concentration: mg/m & sup3;(mass of dust per cubic meter of air).
   • particle size distribution according to the particle diameter (such as 0-5 m, 5-10 m, etc.) classification statistics.

3. Industry Applications and Requirements

the requirements for dust content of compressed air vary significantly in different industries:

example: A textile factory uses a 5-stage filtration system, and the measured dust content is 38 mg/m & sup3;(particle size ≤ 40μm), which meets the 5-level standard of ISO 8573.1, but cannot meet the strict requirements of textile industry for 1 mg/m & sup3; The filtration system needs to be upgraded.

4. Technical Background and Efficiency

• filtration Principle: 5-stage filtration usually includes multi-stage combinations such as coarse filtration (removing large particles), medium filtration (intercepting medium-sized particles), and fine filtration (capturing small particles).
• Efficiency differences: Different filter combinations have different efficiencies. For example:
  • coarse filtration, medium filtration and fine filtration: The dust content can be reduced to level 5 (40 mg/m & sup3;).
  • Added Super Fine Filter: Dust content can be raised to level 1 (0.1 mg/m & sup3;).

5. Summary

• dust content after 5-stage filtration: According to ISO 8573.1, it is usually ≤40.0 mg/m&sup3;(particle size ≤ 40.0 μm).
• Detection method: Preferable choice of dust particle counter or compressed air detector.
• Industry requirements: The matching filter level needs to be selected according to the specific application scenario, and the system needs to be upgraded to meet strict standards if necessary.