Atlas Copco Blow-Off Valve Replacement – 1622369480

The Atlas Copco 1622369480 Blow-Off Valve (Unloader Valve Kit) is a genuine OEM component designed for oil-injected rotary screw air compressors. It releases internal pressure during unloading and shutdown, enabling smooth compressor restarts and protecting the air end from unnecessary mechanical stress. The valve is a critical part of the compressor’s load/unload control system, ensuring reliable and energy-efficient operation. Atlas Copco identifies this part as a KIT VALVE UNLOADER.

Key Features

• Genuine Atlas Copco blow-off (unloader) valve kit
• Controls compressor unloading and pressure release
• Durable OEM construction for long service life
• Fast pneumatic response
• Direct replacement for worn or damaged blow-off valves
• Approximate weight: 130 g

Benefits

• Ensures smooth compressor startup and shutdown
• Prevents excessive internal pressure buildup
• Reduces motor starting load
• Improves compressor efficiency
• Extends the life of the air end and control components
• Minimizes maintenance costs and unexpected downtime

Working Process

1. During compressor loading, the blow-off valve remains closed to allow normal compression.
2. When the compressor unloads or stops, the valve opens to vent trapped internal pressure.
3. The released pressure allows the compressor to restart without excessive load.
4. The valve then closes automatically when the compressor returns to the loaded condition, restoring normal operation.

Typical Applications

• Atlas Copco oil-injected rotary screw air compressors
• Chicago Pneumatic compressors using the same valve design
• Manufacturing plants
• Automotive workshops
• Engineering and industrial compressed air systems