Minimum Pressure Valve Repair Kit Replacement – 02250177-150

The 02250177-150 Minimum Pressure Valve Repair Kit contains the wear components required to restore the operation of the compressor’s Minimum Pressure Valve (MPV). The MPV maintains a minimum pressure inside the air/oil separator vessel (typically around 4–5 bar) before allowing compressed air to enter the plant air system. This pressure is essential for proper oil circulation, efficient oil separation, and stable compressor performance. The valve also functions as a check valve, preventing reverse airflow when the compressor stops.

Working Process

1. Compressor Start-up
   • The MPV remains closed while the separator vessel builds the required minimum internal pressure.
2. Lubrication
   • The maintained pressure ensures continuous oil circulation through the airend, bearings, and cooling circuit, preventing inadequate lubrication.
3. Oil Separation
   • Proper separator pressure improves the efficiency of the oil separator element, reducing oil carryover into the compressed air system.
4. Air Delivery
   • Once the preset pressure is reached, the MPV opens gradually, allowing compressed air to flow to the downstream air network.
5. Shutdown Protection
   • When the compressor stops, the valve closes automatically to prevent compressed air from flowing back into the separator vessel and airend.
6. Maintenance Function
   • Over time, springs, seals, O-rings, and valve seats wear out. The 02250177-150 Repair Kit replaces these components, restoring correct valve operation, maintaining pressure stability, and extending compressor service life.

Key Features

• Complete repair kit for the Sullair Minimum Pressure Valve (MPV).
• Maintains the required minimum separator vessel pressure.
• Improves lubrication and oil separation efficiency.
• Prevents reverse airflow during shutdown.
• Restores reliable compressor performance and pressure stability.
• Reduces oil carryover, air leakage, and maintenance downtime.
• Compatible with selected Sullair LS12, LS16, LS20, LS200, V-120, V-160, V200, V200S, VCC200S, and related rotary screw air compressors using Part No. 02250177-150.