2026-04-15Views：
With regard to the correspondence between the pressure dew point of compressed air and the water content, according to industry standards and technical specifications, the water content index under the condition of pressure dew point -31.6 ℃ is as follows:
1. Technical Benchmarks and Conversion Principles
the water content of compressed air is negatively correlated with the pressure dew point, that is, the lower the dew point temperature, the higher the degree of drying of the gas. Under the condition of standard atmospheric pressure (0.101MPa), it can be converted by special comparison table or empirical formula. When the pressure dew point is involved, the influence of pressure on the water vapor saturation characteristics should be considered, and the correction formula or industry experience data are usually used for conversion.
2. key data derivation
3. industry practice reference
4. management recommendations
5. Conclusion
under the condition of 0.7MPa working pressure, when the dew point of compressed air pressure is -31.6 ℃, the theoretical value of water content is about 230-240ppm. Considering the detection error and equipment accuracy, the actual control value should be in the range of 220-260ppm. Enterprises should establish a three-dimensional monitoring system including pressure, temperature and water content, and regularly conduct data comparison and analysis to ensure that the quality of compressed air meets the relevant requirements of ISO 8573-1 "Compressed Air Quality Level. For special industries such as precision manufacturing, it is recommended to tighten the control index to within ± 15ppm to ensure process stability.
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