Atlas Copco UL00773 Unloader Assembly

Atlas Copco UL00773 Unloader Assembly is a genuine replacement component that controls the unloading function on Atlas Copco oil-injected screw compressors, enabling smooth starts by unloading the compression chamber during start/stop sequences. The assembly coordinates the unloader valve mechanism and related hardware to release trapped air and relieve system pressure when the unit stops, helping to prevent excessive starting torque and wear. Catalog listings for Atlas Copco unloader assemblies show related part numbers such as 1613900888 (Unloader Assembly) and 2202260841 (Unloader Assembly), illustrating the role of this family of parts across Atlas Copco's oil-injected screw compressor platforms. When replacing UL00773, verify the exact model/serial compatibility and source the correct Atlas Copco unloader assembly to preserve the integrity of the unloading system and maintain proper valve operation. Typical applications include routine maintenance and repair tasks where the unloader valve or related components have failed or leaked, or during service intervals that require replacement of the unloader mechanism in oil-injected screw compressors. This assembly is designed to integrate with Atlas Copco unloading-system architectures and complements the broader set of unloader valves and service kits documented by Atlas Copco.