Emergency standby: In-house equipment breaks down and shuts down; immediate air supply guarantee is required.

New project commissioning: For trial operation of new factories/production lines before the permanent air supply is in place.

Peak season capacity expansion: Cover air supply shortage caused by fluctuating orders.

Maintenance transition: Scheduled shutdown maintenance or system upgrading.

Energy-saving optimization: Peak shaving and valley filling to avoid no-load waste of large units.