Kaeser 12,000-Hour Inlet Valve Maintenance Kit Replacement – 401821

The Kaeser 401821 is identified in compressor-parts listings as a 12,000-hour maintenance kit for the inlet valve. It is also listed as 401821.0 in replacement-parts catalogs.

Working Process

The Kaeser 401821 inlet valve maintenance kit is used to service the compressor’s inlet valve, which controls the amount of atmospheric air entering the compressor airend.

During normal compressor operation, the inlet valve opens according to the compressed-air demand. When the compressor is loaded, the valve allows the required quantity of air to enter the screw element for compression. As system pressure reaches the required level, the compressor control system reduces or closes the inlet flow, allowing the compressor to operate in an unloaded condition.

Over time, seals and other inlet-valve components can wear because of continuous movement, pressure changes, temperature and contamination. The 401821 maintenance kit provides the required service components to restore the inlet valve’s operating condition during scheduled maintenance.

A properly maintained inlet valve helps the compressor load and unload correctly, maintains appropriate airflow and supports efficient operation. A worn inlet valve can contribute to air leakage, incorrect loading/unloading, unstable pressure and increased energy consumption.

Key Benefits

• Designed for inlet-valve maintenance.
• Helps restore proper compressor inlet-air control.
• Supports reliable loading and unloading.
• Helps maintain efficient airflow.
• Reduces the risk of inlet-valve leakage.
• Supports stable compressor pressure control.
• Suitable for scheduled compressor maintenance.
• Helps extend the service life of the inlet-valve assembly.
• Designed for compatible Kaeser screw compressors.

Maintenance Application

The 401821 is specifically marketed as a 12,000-hour inlet-valve maintenance kit, making it suitable for planned compressor servicing at the applicable maintenance interval.

Exact compressor compatibility should be confirmed using the Kaeser compressor model and serial number before installation.

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