Unit of measurement for air compressors

The unit of measurement of an air compressor mainly involves many aspects, including pressure, volume, power, exhaust volume, temperature, etc. The following is a detailed explanation:

1. Pressure unit

• Pascal (Pa): The standard pressure unit in the International System of Units, 1 Pascal is equal to 1 Newton/square meter (N/m²). But in the air compressor industry, Pascals are often used to represent very small pressure values.
• Bar (Bar): 1 bar equals 100,000 Pascals, which is a commonly used pressure unit in the air compressor industry. For example, the exhaust pressure marked on the nameplate of the air compressor may be in units of bar.
• Kg of force/cm² (kgf/cm²): Also known as “kg”, it is commonly used as a unit of exhaust pressure in the air compressor industry, which is approximately equivalent to Bar. The pressure of 1 kg (kgf/cm²) is approximately equal to 1 bar (Bar).
• Megapas (MPa): 1 megapa is equal to 1,000,000 Pascals, equal to 10 bar (Bar). Used to indicate higher pressure values.
• Pound Force Per Square Inch (psi): The more common pressure unit in the US market, 1 psi equals 6,894.76 Pascals.

2. Volume Units

• Cubic Meters (m³): Standard volume units in the International System of Units, used to represent the volume of a large amount of gas.
• Liter (L): Commonly used volume units, 1 cubic meter equals 1,000 liters.
• Cubic Centimeters (cm³): Smaller volume units for precise measurement.
• Gallon (Gallon): British and American volume unit, 1 gallon is about 3.8 liters.

3. Power Units

• KW (kW): Standard power units in the International System of Units, used to represent the power of the drive motor of the air compressor.
• Horsepower (hp): Commonly used power units, especially in North America. 1 horsepower is about 0.75 kilowatts.

4. Unit of exhaust gas

• Cubic meters per minute (m³/min): represents the volume of gas discharged by the air compressor in unit time.
• Per minute (L/min): Commonly used units of exhaust volume, 1 cubic meter per minute equals 1,000 liters per minute.
• Standard cubic meters per minute (Nm³/min): The amount of exhaust gas measured at standard temperature and pressure.
• Cubic Footsteps per minute (CFM): Commonly used units of air discharge in North America, 1 cubic foot per minute is approximately 28.3 liters per minute.

5. Temperature unit

• degrees of Celsius (℃): the standard temperature unit in the International System of Units.
• Degrees of Fahrenheit (℉): Commonly used to measure conventional temperature ranges, especially in North America. The conversion formula is: °F = (°C × 9/5) + 32.
• Kelvin (K): The thermodynamic temperature unit in the international system of units, with an absolute zero of 0K. The relationship with degrees Celsius is: K = °C + 273.15.

6. Other units

• dB (dB): used to represent the noise level of the air compressor.
• mg/cubic meter (mg/m³): used to represent the oil mist content in the air, etc.

Summary:

The air compressor has a variety of units of measurement, covering pressure, volume, power, exhaust volume, temperature and other aspects. In practical applications, it is necessary to select appropriate units based on specific measurement needs and data representation habits. For example, when indicating the exhaust pressure of an air compressor, bar (Bar) or kilogram force per square centimeter (kgf/cm²) is commonly used; when indicating the exhaust volume of an air compressor, cubic meters per minute (m³/min) or liter per minute (L/min) is commonly used.