Wholesale Atlas Copco Screw Air Compressor Part Intake Unloader Valve
High-quality Atlas Copco unloader valve 1622098380 / 1622515580 for oil-injected screw compressors. Built with durable materials and precision design, ensuring stable load/unload control, energy efficiency, and long-lasting reliability.
| Application |
Air Compressor |
|---|---|
| Material |
Aluminum ,Stainless Steel |
The unloader valve (also called the intake valve) is one of the key control components in an Atlas Copco oil-injected screw air compressor. The unloader valve (Part No. 1622098380 / 1622515580) regulates the amount of air entering the compressor element, controlling the transition between load and unload states. Its precise function ensures that the compressor maintains energy efficiency, prevents pressure surges, and enables smooth start-up and shutdown cycles.
Function and Working Principle
During normal operation, the unloader valve determines whether the compressor runs under load (air compression) or in an unloaded (idling) state:
- At start-up, the valve remains closed, allowing the compressor to build up internal oil pressure and prevent overloading the motor.
- When the system reaches the operating pressure, the control signal opens the valve, allowing air intake for compression.
- When the set pressure is reached, the unloader valve closes partially or completely, reducing or stopping air intake. This prevents excessive pressure buildup and reduces power consumption.
- During idle or stop, the valve releases trapped pressure in the air filter and suction chamber, allowing a quick and safe shutdown.
The valve is pneumatically controlled via the pressure switch and control solenoid, making it a crucial part of the energy-saving system in screw air compressors.
Design and Construction
To meet the high demands of industrial air systems, the Atlas Copco unloader valve is built with superior materials and tight manufacturing tolerances:
- Valve Body: Precision-cast aluminum alloy with hard anodized coating for excellent corrosion resistance and low friction surface.
- Spool & Piston Assembly: CNC-machined stainless steel with mirror finishing to ensure smooth movement and sealing performance under continuous cycling.
- Sealing Components: High-performance fluororubber (Viton) or NBR seals resistant to high temperature and oil exposure.
- Spring Mechanism: Specially heat-treated alloy spring maintains consistent elasticity and precise response even after thousands of load/unload cycles.
- Port Connection: Threaded or flange-type fittings compatible with Atlas Copco’s compressor manifolds for easy installation and maintenance.
Performance Advantages
- Stable air intake control for smooth transition between loading and unloading.
- Energy-efficient operation, reducing idle power loss.
- Fast response time for pressure changes, improving compressor regulation accuracy.
- Leak-free sealing under continuous operation, minimizing air loss.
- Durable materials resistant to oil, heat, and contaminants.
- Fully compatible with multiple Atlas Copco compressor models using P/N 1622098380 or 1622515580.
Installation and Maintenance Tips
- Verify the valve’s orientation and flow direction before installation; incorrect placement may cause unstable air supply or compressor hunting.
- Always clean the connecting pipes and filter element before fitting the new valve to avoid contamination.
- When replacing, depressurize the system completely and disconnect control lines to prevent unintentional air discharge.
- Check for carbon buildup or sticky movement caused by oil contamination; periodic cleaning improves reliability.
- Replace sealing elements during major compressor overhauls.
- Ensure that all pneumatic control hoses are free from cracks or leaks to maintain accurate load/unload timing.
Common Symptoms of Valve Failure
Operators should be alert to early signs of unloader valve wear or malfunction, such as:
- Compressor fails to unload at full pressure.
- Frequent load/unload cycling or unstable pressure output.
- Audible air leakage from valve body during idle mode.
Delayed start-up or high starting current.
Addressing these issues promptly by replacing the unloader valve (P/N 1622098380 or 1622515580) can prevent larger system failures and reduce maintenance downtime.
Compatible Atlas Copco Models
The Unloader Valve 1622098380 / 1622515580 is suitable for a wide range of Atlas Copco GA, GX, and GR series oil-injected rotary screw compressors.
(Compatibility may vary depending on production year—please confirm with the equipment’s service manual or OEM cross-reference.)
| Part Numbers | |||||||
|---|---|---|---|---|---|---|---|
| 1613681801 | 1613900884 | 2911000000 | 1617238400 | 2901046100 | 2910300200 | 1622963900 | 1623079485 |
| 1622171383 | 2901145300 | 2901000500 | 2901021200 | 1613679300 | 2906020100 | 2901141100 | 2901084001 |
| 1622316200 | 1625005540 | 2901000600 | 2901108401 | 1622171300 | 2901139900 | 2901099700 | 2205490598 |
| 1622316285 | 2906009500 | 3015500606 | 2200900943 | 1613900800 | 1614647680 | 1617238400 | 2906063320 |
| 1613814400 | 2901099700 | 1622963900 | 2906038000 | 1614900883 | 1513040081 | 2901021200 | 2901021701 |
| 1614900801 | 3001500626 | 2901084001 | 2901145300 | 1613815000 | 2906095900 | 2901108401 | 2901021200 |
We also offer intake unloading valves with the above part numbers. Please feel free to contact us if needed.
Why Choose Our Replacement Unloader Valve
We supply precision-engineered air compressor components built to meet or exceed OEM performance. Each unloader valve is CNC-machined, pressure-tested, and clean-room assembled to ensure flawless operation and long service life.
Our products deliver stable control, efficient air management, and reliable system protection, making them the ideal replacement for your Atlas Copco compressors.
MAECENAS IACULIS
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