Is the air supply pressure the same as the exhaust pressure?

Air supply pressure and exhaust pressure of air machine not the same. The following is a detailed explanation of the supply pressure and exhaust pressure:

supply pressure

• definition: The air supply pressure usually refers to the pressure of the gas output by the air compressor. In the standard case, it is usually defined as standard atmospheric pressure, that is, 101.32 5千帕. This value can be customized in some applications.
• Features: The air supply pressure is the reference pressure when the air compressor is working normally, and it determines the output capacity of compressed air. Due to the relatively low supply pressure, the temperature change of the gas as it passes through the compressor is small.

Exhaust pressure

• definition: Discharge pressure refers to the gas pressure that the air compressor finally discharges from the compressor, which depends on the specific purpose and use requirements. For example, high-pressure breathing air systems require higher exhaust pressures, while tire inflation requires relatively lower pressures.
• Features: Exhaust pressure is one of the important parameters of air quality and an important indicator to measure the performance of air compressors. Due to the higher exhaust pressure, the amount of heat and variable heat in the exhaust process are larger, which may cause the temperature in the exhaust process to be higher.

relationship between the two

• difference: The air supply pressure is usually a relatively stable value to meet the basic compressed air demand; while the exhaust pressure is adjusted according to the specific application scenario to meet different pressure requirements.
• mutual influence: There is a certain correlation between the supply pressure and the exhaust pressure. For example, in the air compression process, as the compression progresses, the supply air pressure gradually rises and approaches the discharge air pressure. At the same time, the adjustment of the exhaust pressure may also have a certain impact on the supply pressure.

Application Scenarios

• when selecting and using an air compressor, it is necessary to select the appropriate air supply pressure and exhaust pressure according to the specific needs. For example, where high-purity compressed air is required (e. g., in the food and pharmaceutical industries), it may be necessary to select an oil-free air compressor and strictly control the discharge pressure to ensure air quality.

In summary, the air supply pressure and exhaust pressure of the air engine are two different concepts, and they are different in terms of definition, characteristics and application scenarios.