What is the general pressure of compressed air?

Official description of compressed air pressure standards

In the field of industrial production, compressed air is an important power source and process medium, and the setting of its pressure parameters directly affects equipment operating efficiency and process stability. After systematically sorting out the industry specifications and technical characteristics, the following professional explanations are made on the compressed air pressure standards and related technical parameters:

1. Pressure level classification system
According to equipment operating conditions and process requirements, compressed air pressure is divided into four technical levels:

1. Low voltage application scenarios (0.1-1.0MPa)
   Suitable for basic pneumatic tools and simple transmission systems, such as:

• Pneumatic screwdriver (0.4-0.6MPa)
• Basic material conveying system (0.2-0.8MPa)
• Textile machinery auxiliary device (0.5-0.7MPa)

2. Medium voltage application scenarios (1.0-10MPa)
   Widely used in the field of industrial automation, typical applications include:

• CNC machine tool pneumatic chuck (4-6MPa)
• Food packaging heat sealing equipment (5-7MPa)
• Automotive manufacturing spraying system (6-8MPa)

3. High-pressure application scenarios (above 10MPa)
   Mainly used for special process needs, such as:

• PET bottle blow molding (15-25MPa)
• Airtightness test of deep-sea exploration equipment (20-30MPa)
• Aerospace ground support system (25-35MPa)

4. Ultra-high voltage application scenarios (above 40MPa)
   Suitable for professional engineering fields, including:

• Water jet cutting system (40-280MPa)
• Geological exploration and core taking operation (50-150MPa)
• Special material forming process (60-200MPa)

2. Typical industry application standards

1. General manufacturing field

• Mechanical processing: Recommended pressure range 0.5-0.8MPa, pressure fluctuation ≤±0.05MPa
• Packaging industry: Standard working pressure 0.6-0.7MPa, peak pressure ≤0.9MPa
• Textile industry: main air supply pressure 0.6-0.8MPa, loom local pressurization to 1.2MPa

2. Precision manufacturing field

• Electronic assembly: working pressure 0.45-0.55MPa, dust content ≤0.1μm
• Pharmaceutical production: clean compressed air pressure 0.3-0.5MPa, microbial indicators ≤10CFU/m³
• Laboratory equipment: precision instrument air supply pressure 0.2-0.4MPa, pressure stability ≤±0.02MPa

3. Technical points of system configuration

1. Pressure matching principle

• Power equipment: Configure system pressure based on the tool rated pressure rising by 10-20%
• Process equipment: Set working pressure according to equipment manufacturer’s technical specifications
• Special process: Pressure matching verification test is required

2. Stabilizing voltage guarantee measures

• Air storage tank configuration: Configure buffer air tanks according to 15-20% of the system volume
• Pressure stabilizing device: Install a precision pressure reducing valve at the front end of precision equipment, with a pressure stabilizing accuracy of ±0.01MPa
• Monitoring system: Install digital pressure sensor, and data acquisition frequency ≥1 time/second

4. Operation and maintenance specifications

1. Pressure verification cycle

• Conventional system: Pressure gauge calibration is carried out every six months
• Key systems: Implement monthly pressure sensor comparison testing
• Special equipment: Implement legal metrology verification cycle

2. Pressure drop management standards

• Pressure drop of main pipeline: ≤0.1MPa/100m
• Pressure drop of branch pipelines: ≤0.05MPa/50m
• Terminal pressure drop: ≤0.02MPa (measured 1 meter away from the gas point)

It is recommended that enterprises establish a compressed air pressure management system, including pressure files, verification records, change records and other document control procedures. Conduct a compressed air system pressure audit every year and use FMEA tools to identify potential risk points. For new projects, CFD simulation should be carried out to optimize the layout of the pipe network, avoid low-flow-velocity dead spots, and ensure the stability of gas supply pressure from the design source. Through refined pressure management, system energy efficiency is maximized while ensuring process quality.