Imagine an industrial production line where an air compressor suddenly shuts down due to improper parameter settings, or where minor leaks cause significant efficiency losses. Such scenarios can result in substantial economic damage. As core equipment in industrial operations, proper compressor selection, correct usage and timely maintenance are crucial. This article addresses common compressor application questions through a Q&A format, providing practical reference for engineers and technicians.

Pressure unit conversion is a fundamental yet critical skill in compressor operations. Below are common conversion relationships:

• 1 kgf/cm² ≈ 0.098 MPa
• 500 kPa/cm² = 0.5 MPa

Understanding these conversions enables accurate interpretation of technical specifications and prevents errors caused by unit confusion.

Japan's power grid operates on both 50Hz and 60Hz frequencies. Special attention is required when using compressors across different frequency regions. Directly using a 50Hz compressor in a 60Hz area may cause motor over-speed, leading to current overload and equipment overheating. The proper solution involves replacing the motor pulley and V-belt with 60Hz-compatible components or consulting professional service providers.

Conversely, using a 60Hz compressor in a 50Hz region reduces air delivery by approximately 20%, potentially causing insufficient air supply and production delays. These frequency-related impacts must be carefully considered for cross-regional compressor applications.

Correct pipe diameter selection is essential for compressed air system design and installation. Common metric-to-imperial conversions include:

• 8A = 1/4B (2 parts)
• 10A = 3/8B (3 parts)
• 15A = 1/2B (4 parts)
• 20A = 3/4B (6 parts)
• 25A = 1B (1 inch)

Note that 1 inch equals 25.4 millimeters. Mastering these conversions ensures proper dimensional matching during system design and installation, maintaining pipeline integrity.

Compressors are categorized by compression method: single-stage units compress air directly from atmospheric pressure to rated pressure, while two-stage models first compress air to intermediate pressure (0.2-0.3MPa) via a low-pressure cylinder, cool it, then complete compression through a high-pressure cylinder. Two-stage compression offers higher efficiency due to smaller pressure ratios and intermediate cooling.

Notably, reducing the rated pressure of two-stage compressors doesn't significantly affect air delivery, making them ideal for applications requiring stable output.

Compressed air leaks represent significant energy waste. For example, at 0.7MPa pipeline pressure, a 1mm diameter leak hole results in approximately 75L/min leakage - equivalent to the output of a 0.75kW compressor. Timely leak detection and repair are therefore critical for energy conservation and productivity.

Applications requiring high air quality must monitor residual oil concentrations, typically measured in (wt)ppm or mg/m³. The ppm unit (parts per million) indicates oil-to-air weight ratio (mg/mg). For instance, 0.5wtppm means 0.5×10⁻⁶ mg oil per mg air. Understanding these units helps select appropriate filters to meet specific air quality requirements.

This technical overview aims to enhance compressor understanding and application, ultimately improving production efficiency while reducing operational costs. Practical applications should consider specific conditions and professional consultation when necessary.