Standard for water content of compressed air

The water content standard of compressed air varies according to the application scenario. The core is to control the moisture content in the air to avoid adverse effects on equipment, products or processes. The following is a brief description of the relevant standards:

key indicators of water content: dew point temperature

the moisture content in compressed air is usually expressed in "dew point temperature. The lower the dew point temperature, the drier the air; on the contrary, the higher the dew point temperature, the more moisture in the air. When the compressed air is cooled to the dew point temperature, the moisture in it will begin to condense into liquid water.

Water content requirements for different scenarios

1. general industrial scenario(e. g. machinery manufacturing, textiles):
   the requirement for the dryness of compressed air is relatively low, and the dew point temperature is usually controlled above 0 ℃, mainly to avoid corrosion caused by the accumulation of condensed water in the pipeline or affect the operation of the equipment.

2. Precision Manufacturing and Electronics Industry:
   more dry compressed air is required, and the dew point temperature is usually below -20°C to prevent moisture from causing corrosion or short circuits to precision components (such as chips and sensors).

3. Pharmaceutical and Food Industry:
   the cleanliness and dryness of compressed air are required to be extremely high, and the dew point temperature should be controlled below -40 ℃ to ensure that there is no moisture in the air to avoid contamination of the product or affect the aseptic requirements of the production environment.

Methods of controlling water content

in order to meet the standards of different scenarios, drying equipment is usually installed at the rear end of the air compressor:

• freeze dryer: The water is condensed and discharged by cooling, which is suitable for general industrial scenes.
• adsorption dryer: Use adsorption materials (such as activated alumina) to further remove moisture, which is suitable for scenarios that require higher dryness.

Through proper selection of drying equipment and regular maintenance, it is ensured that the moisture content of the compressed air continues to meet the requirements of the application.