Oil content in parts per million (ppm) is a critical parameter for compressed air quality, and it is classified into grades from Class 0 to Class 5 according to ISO 8573‑1. Class 0 denotes oil-free compressed air (≤0.01…
This paper outlines the commissioning key points and typical maintenance scenarios for oil-free screw compressors in semiconductor plants in the Nantong region, covering clean air standards, system integration and testing procedures, common fault diagnosis, and localized maintenance recommendations,…
This article provides a detailed explanation of the definition of compressed air flow rate (CFM), its core calculation methods—namely, the state‑conversion method, the demand‑summation method, and the velocity‑inversion method—as well as the factors that influence it. It also…
Mobile air compressors as complete units are not classified as special equipment; however, if their accompanying pressure vessels have a volume of ≥25 L and a working pressure of ≥0.1 MPa, they qualify as pressure vessels under the…
The vibration level of an air compressor’s main unit is typically assessed according to the ISO 20816 standard. Under normal operating conditions, it should generally be ≤2.8 mm/s (RMS); values exceeding 4.5 mm/s warrant close attention, and readings…
The decommissioning of air compressor pressure vessels shall be carried out in accordance with TSG 21; the principal circumstances include exceeding the service life, failing inspection, and the presence of irreparable defects. Periodic inspections serve as the key…
The moisture content of pharmaceutical compressed air directly affects sterility assurance and product quality. This article analyzes the classification requirements for pressure dew point specified in ISO 8573‑1, and, in conjunction with GMP’s control framework for clean compressed…
At standard atmospheric pressure, a dew point of −34°C corresponds to a moisture content of approximately 0.29 g/m³ (per dry air), or 156 ppmᵥ. This dew‑point level is suitable for high‑requirement industrial applications and is typically achieved using…
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