Atlas Copco Unloader Valve Service Kit Replacement – 2901044800

The Atlas Copco 2901044800 Unloader Valve Service Kit (KIT SCU) is a genuine OEM maintenance kit designed for selected Atlas Copco oil-injected rotary screw air compressors. The unloader valve assembly is a critical component of the compressor control system that manages the loading and unloading process by controlling inlet air flow. Proper operation of the unloader valve ensures smooth compressor start-up, stable pressure regulation, reduced energy consumption, and efficient compressed air production.

Manufactured according to Atlas Copco’s strict OEM quality standards, the 2901044800 KIT SCU contains precision-engineered valve, piston, spring, sealing, and gasket components required to restore the original performance of the unloader/inlet valve assembly. The kit is designed for direct replacement and helps prevent air leakage, improve compressor response, and maintain reliable operation during demanding industrial applications.

Features

• Genuine Atlas Copco OEM service kit
• Part Number: 2901044800
• Part Name: KIT SCU / Unloader Valve Service Kit
• Restores inlet and unloading valve performance
• Maintains accurate compressor load/unload control
• Precision-engineered sealing components
• Designed for OEM fit and reliable operation
• Suitable for preventive maintenance and valve overhaul

Typical Kit Contents

• Inlet Valve
• Piston
• Piston Ring
• Springs
• O-Rings
• Gaskets
• Washers
• Seal Washer
• Tube Grease
• Assembly Instructions

(Exact contents may vary depending on compressor model and production revision.)

Applications

• Atlas Copco Oil-Injected Rotary Screw Compressors
• Compressor Inlet Valve Assembly
• Unloader Valve System
• Pneumatic Control System
• Preventive Maintenance and Compressor Overhaul

Benefits

• Restores smooth compressor loading and unloading
• Improves pressure control accuracy
• Reduces internal air leakage
• Protects compressor components from excessive stress
• Improves compressor efficiency and reliability
• Minimizes downtime and maintenance costs

Specifications

• Part Name: Unloader Valve Service Kit (KIT SCU)
• Part Number: 2901044800
• Brand: Atlas Copco
• Approximate Weight: 1.46 kg
• Compatible Series: Commonly associated with Atlas Copco GA55–GA75/GA55–110C compressor applications (verify by model and serial number).
• Application: Service and overhaul of inlet/unloader valve assemblies for Atlas Copco oil-injected screw compressors.

Maintenance Recommendation:
Replace the unloader valve service kit during scheduled compressor servicing or whenever symptoms such as improper loading, pressure fluctuations, air leakage, or difficult starting are observed. Always confirm compatibility through the compressor model and serial number before installation.