Plant air supply pressure is usually 0.5 MPa to 0.8 MPa the specific values vary depending on the industry, equipment type and process requirements. The following is a detailed description:
typical supply pressure ranges 1. different industries
- machinery manufacturing industry
- pneumatic tools: Light pneumatic wrench (such as small parts assembly) required 0.5 MPa heavy-duty pneumatic wrenches (such as large equipment assembly) are required. 0.6 - 0.7 MPa.
- Pneumatic clamp: In order to ensure the stability of workpiece clamping, the pressure is usually set 0.4 - 0.6 MPa; high-precision machining workshops may be precisely controlled in 0.45 MPa left and right.
- electronic manufacturing industry
- automation equipment(e. g. SMT mounter): The air source pressure should be stable 0.5 - 0.55 MPa. If the pressure is too high, the components may be damaged, and if it is too low, the mounting will be weak.
- food processing industry
- pneumatic sealing machine: The appropriate pressure is 0.5 MPa at the same time, it is necessary to meet the equipment operation requirements and food safety standards (such as oil content ≤ 0.01 mg/m & sup3;, solid particle diameter <0.1 μm).
- Industrial processes (e. g. metalworking, plastic production)
- when compressed air is used as a power source, the pressure is usually 0.7 - 1.0 MPa between, but need to be adjusted according to the specific process.
Fluctuation and Control of 2. Gas Source Pressure
- main pipe pressure: In order to ensure the stable pressure of the gas point at the end, the pressure of the main pipeline is generally not lower 0.7 MPa.
- Gas point pressure: Adjust to the required pressure of the equipment through the pressure reducing valve (such 0.4 - 0.5 MPa) To reduce pipeline pressure loss.
- Pressure fluctuation range according to national standards (such as GB/T 4830-2015), the allowable fluctuation range of the air source pressure at the input end of the instrument is the nominal value. ± 10%.
Selection basis of 3. air source pressure
- equipment requirements: According to the rated pressure selection of pneumatic tools, fixtures or automation equipment, to avoid performance degradation caused by insufficient pressure or high pressure caused by safety hazards.
- Pipeline design: Too small pipe diameter or too many elbows will cause pressure loss. It is necessary to optimize the pipeline layout (such as shortening the air supply distance and reducing elbows) to reduce the loss.
- Safety Standards: Compressed air pressure exceeds 0.2 MPa direct contact with the human body may cause serious injury (e. g. subcutaneous emphysema, organ rupture), and safety regulations must be strictly observed.
4. actual cases and rectification effect
- case: The air source pressure fluctuates in an auto parts manufacturing plant due to unreasonable air compressor selection (insufficient capacity) and pipeline design defects. 0.3 - 0.7 MPa between, causing pneumatic equipment failure (such as loose clamps, insufficient tool torque), the defective rate increased.
- Rectification measures: Replace the large-capacity air compressor, optimize the pipeline design, and stabilize the air source pressure 0.55 - 0.65 MPa significantly reduce the rate of defective products and improve production efficiency.
