Sullair Minimum Pressure / Check Valve Replacement – 242405

The Sullair 242405 Minimum Pressure / Check Valve (MPV) is an OEM valve used in Sullair rotary screw air compressors. It performs two critical functions: maintaining the minimum internal pressure required for proper oil circulation during compressor operation and preventing compressed air from flowing back into the compressor during shutdown. This ensures efficient lubrication, reliable performance, and protection of the air end.

Key Features

• Genuine Sullair OEM minimum pressure/check valve
• Maintains the required minimum separator tank pressure
• Integrated check valve prevents reverse airflow
• Heavy-duty construction for continuous industrial operation
• Accurate opening pressure for stable compressor performance
• 2-inch NPT connection (model dependent)

Benefits

• Ensures proper oil circulation during startup
• Prevents compressor air-end reverse rotation after shutdown
• Improves compressor efficiency and reliability
• Protects internal components from premature wear
• Reduces maintenance costs and downtime
• Supports stable compressed air delivery

Working Process

1. During startup, the valve remains closed until the separator tank reaches the minimum operating pressure.
2. Once the required pressure is achieved, the valve opens and supplies compressed air to the air system.
3. During normal operation, it maintains stable internal pressure for effective oil separation and lubrication.
4. When the compressor stops, the integrated check valve closes to prevent backflow of compressed air into the compressor.

Typical Applications

• Sullair rotary screw air compressors
• Industrial manufacturing plants
• Automotive and engineering workshops
• Food, textile, and general industrial compressed air systems
• Heavy-duty continuous-duty compressor installations