What is the rated air supply pressure of the air compressor

Technical description on rated air supply pressure of air compressor

The rated air supply pressure of an air compressor is a core parameter in equipment selection and system design, which is directly related to the satisfaction of process requirements and operating economy. After systematically reviewing relevant technical specifications and industry practices, the definition, application and management points of this parameter are explained as follows:

1. Core definitions and technical characteristics

1. basic concepts

• Rated air supply pressure: refers to the maximum pressure value at which the air compressor can output continuously and stably under standard operating conditions (usually 20℃, 0.1MPa intake pressure) verified through performance tests. This parameter needs to be marked on the equipment nameplate and technical documentation as the core identification of equipment performance.

2. technological relatedness

• Relationship with exhaust volume: Under the same power conditions, for every 0.1MPa increase in air supply pressure, the exhaust volume decreases by about 5-8%. Equipment selection and matching need to be carried out through the pressure-capacitance curve (P-V curve).
• Related to energy efficiency: For every 0.1MPa increase in supply pressure, the specific power (kW/m³/min) increases by about 3-5%. Pressure settings need to be optimized according to actual needs to avoid waste of energy efficiency.

2. Industry application standards

1. generic scene

• Industrial power source: For conventional pneumatic tools, material transportation and other scenarios, it is recommended to set a pressure range of 0.6-0.8MPa, covering more than 85% of the conventional gas demand.
• Special process: Set according to terminal equipment requirements, pressure fluctuations should be controlled within ±0.02MPa to ensure process stability.

2. industry differences

• Mechanical processing: It is recommended that the gas for CNC machine tools is 0.6MPa and the pressure dew point is-20℃ to prevent tool corrosion.
• Automobile manufacturing: The spraying station requires 0.7MPa and the oil content is ≤0.01ppm to ensure the quality of the coating.
• Textile industry: It is recommended that the air consumption for looms is 0.5MPa, and a three-level filtration system is required to avoid fabric pollution.

3. System configuration specifications

1. tank unit

• Air storage tank volume: It is recommended to configure it at 10-15% of the maximum air consumption to effectively buffer pressure fluctuations and reduce the number of compressor starts and stops.
• Safety accessories: Equipped with pressure gauge, safety valve and automatic drainage device, and the tripping pressure of the safety valve is set to 1.1 times the working pressure.

2. piping system

• Pipe diameter selection: Calculate the pipe diameter based on flow, pressure and flow rate (usually 15-25m/s), and a pressure reserve of 0.05MPa needs to be added for every 100 meters of main pipe.
• Material requirements: Seamless steel pipes or stainless steel pipes are used, and the inner wall roughness is ≤0.8μm to reduce pressure loss.

4. Key points of operation and maintenance management

1. daily monitoring

• Pressure recording: Record exhaust pressure data every day, draw pressure curves to analyze fluctuations, and investigate abnormal fluctuations in time.
• Leak testing: Conduct leakage testing of the pipe network every month, and the leakage rate should be controlled within 5%. Use ultrasonic leak detector to locate leakage points.

2. regular calibration

• Safety valve: Conduct start-up and tripping test every quarter, and the error should be controlled within ±3% to ensure normal overpressure protection function.
• Pressure gauge: Level I precision gauge needs to be submitted for inspection every year, and Level II precision gauge needs to be submitted for inspection every two years. The calibration label should be pasted and the calibration date should be recorded.

5. Energy efficiency optimization strategy

1. frequency conversion adjustment

• Install a frequency conversion drive system and automatically adjust the speed according to the air consumption. The typical power saving rate can reach 30%, and the pressure fluctuation is controlled within ±0.01MPa.
• Set pressure gradient control, the no-load pressure automatically drops to 0.4MPa, and the loading pressure returns to the set value to reduce ineffective energy consumption.

2. Intelligent pipe network

• The circular pipe network layout is adopted to reduce pressure losses by about 20%. Pressure sensors are equipped at key nodes, and real-time monitoring data is used for optimal adjustment.
• Equipped with an intelligent control system to automatically adjust the number of operating compressors and pressure settings according to peak and valley gas consumption to improve system energy efficiency.

It is recommended that enterprises establish a gas supply pressure management system (SPMS) and incorporate the gas supply system into the scope of process verification. For new construction or renovation projects, CFD fluid simulation analysis should be carried out to optimize the pipe network layout. During system acceptance, the tracking verification of 3 complete production batches needs to be completed to ensure a balance between gas supply quality and energy efficiency levels. Carry out regular audits of the gas supply system, and it is recommended to conduct a comprehensive energy efficiency assessment every two years to continuously optimize operating parameters.