What is the air supply pressure in MPa at the factory?

Standard pressure range of the factory gas supply

In industrial production environments, compressed air is one of the core power sources for driving equipment, controlling valves, and conveying materials. Typically, the supply pressure in a plant’s main air network is set at0.6 to 0.8 MPa (MPa)This range balances conveying efficiency with equipment safety and meets the operating requirements of most standard pneumatic components. In actual operation, the pressure at the end of the piping network may be slightly lower than the air compressor’s outlet pressure due to pipeline losses.

The core variable determining gas supply pressure

The factory’s gas supply is not constant; its actual output is influenced by a variety of operating conditions:

• Peak gas consumption fluctuation:When production shifts change or large equipment is started up simultaneously, a sudden surge in instantaneous air consumption can cause a brief drop in pipeline pressure.
• Piping Design and Length:A pipeline with undersized diameter, excessive bends, or excessive distance from the compressor room will all increase frictional losses along the pipe, resulting in pressure drop.
• Pressure drop across the filtration and drying unit:Air handling units consume some pressure energy when trapping moisture and impurities, so the filter elements must be cleaned regularly to maintain stable output.
• Ambient temperature and humidity:High temperature and high humidity environments increase the compressor load and may cause condensate buildup, indirectly affecting system stability.

Precision Pressure Regulation for Different Application Scenarios

Although the main network is typically maintained at around 0.7 MPa, precise distribution to individual workstations must be achieved via pressure-reducing valves:

• Conventional Assembly and Packaging Line:0 is often used. 4至0.6 MPa, to prevent damage to components caused by excessively rapid cylinder movement.
• Spraying and Surface Treatment:The airflow must be stable and have an extremely low oil content, with pressure typically maintained at 0. 5至0.7 MPa and must be equipped with an efficient oil–water separator.
• Heavy Machinery Drive and Purge:Some casting or stamping processes may require a high-pressure air supply of 0.8 to 1.0 MPa; in such cases, the pipe wall thickness and safety valve settings must be verified.

Key Points for Daily Maintenance of the Air Supply System

A stable gas supply depends on standardized management procedures. Companies are advised to establish a regular inspection regime, with particular attention to monitoring pressure gauge fluctuations, the integrity of pipeline connections, and condensate drainage from gas storage tanks. If frequent low-pressure conditions are observed at end-use points, priority should be given to checking for leaks or clogged filters. Properly sizing surge vessels can effectively dampen pressure pulsations and extend the service life of downstream precision instruments. Additionally, adhering strictly to national technical codes for pressure vessels during annual inspections is a fundamental measure to ensure uninterrupted production.