Wholesale Screw Air Compressor Parts Unloader Valve for Atlas Copco
Precision-engineered unloader valve designed for Atlas Copco screw compressors, part number 1622878687. Built with a robust non-brass alloy housing and high-strength internal components, this valve ensures accurate pressure control, smooth load transitions, and long-term reliability in demanding compressor systems.
| Application |
Screw Air Compressor |
|---|---|
| Material |
Aluminum ,Stainless Steel |
The Atlas Copco Unloader Valve 1622878687 is a key control element within the air intake and compression management system of screw compressors. Its main function is to regulate the flow of intake air, maintain system pressure during unloading phases, and ensure a smooth transition between loaded and unloaded operation.
During startup, the unloader valve remains closed to prevent the compressor from building pressure too quickly. Once the system reaches the preset operating pressure, it gradually opens to balance airflow and stabilize discharge pressure. This dynamic control helps reduce mechanical strain, lower power consumption, and extend the life of the compressor.
This specific model features a modern non-brass construction, offering improved corrosion resistance and lower thermal expansion—ideal for compressors operating in high-moisture.
Material and Structure
The 1622878687 unloader valve utilizes a lightweight cast aluminum alloy body with a reinforced anodized coating that resists pitting, oxidation, and chemical corrosion. The inner mechanism includes:
- Hardened stainless steel valve core and spring, ensuring stability under frequent load cycles.
- High-temperature sealing rings made from Viton® (FKM) or equivalent fluoroelastomer, ensuring reliable air-tight performance under temperatures up to 200°C.
- Polished internal channels to reduce airflow turbulence and minimize pressure drop.
- Oil-resistant elastomer diaphragm, providing smooth and responsive valve actuation.
The combination of materials provides both structural integrity and operational precision, even under continuous duty cycles.
Performance and Technical Features
- Accurate Load Control – Maintains stable system pressure across varying compressor speeds.
- Improved Energy Efficiency – Minimizes energy waste by preventing unnecessary load cycles.
- Fast Response Rate – Quick valve actuation ensures consistent system pressure during startup and shutdown.
- Leak-Proof Construction – Precision-machined sealing surfaces and high-quality O-rings prevent pressure loss.
- Low Maintenance – Self-cleaning design reduces carbon buildup and extends service intervals.
Each valve is calibrated and tested to maintain OEM-grade performance across a wide range of operating pressures and temperatures.
Application Scope
This unloading valve is designed specifically for Atlas Copco oil-injected screw air compressors, suitable for both fixed-speed and variable-speed models. It plays a crucial role in maintaining optimal compressor performance, preventing overpressure, and stabilizing air output during intermittent operation.
Typical applications include:
- Industrial production lines
- Heavy machinery operations
- Power plants
- Petrochemical and energy industries
Compatible with original equipment manufacturer (OEM) part number: 1622878687
This part can directly replace OEM parts and can be installed without any modifications to the compressor housing or control system. Please contact us for specific compatible air compressor models.
| 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.
Quality Assurance
Every 1622878687 unloader valve undergoes comprehensive quality testing, including:
- Leakage tests under maximum rated pressure.
- Dynamic cycling simulations to replicate frequent start-stop operation.
- Thermal endurance testing at elevated temperature environments.
All production units meet ISO and CE standards, ensuring consistent quality, interchangeability, and compatibility with OEM systems.
Maintenance Recommendations
- Inspect the unloader valve assembly at regular service intervals (every 6,000–8,000 operating hours).
- Clean valve ports and air passages to prevent oil carbon accumulation.
- Replace seals or springs if there is any sign of pressure instability or delayed unloading response.
- Use only approved lubricants and filters to maintain the air system’s cleanliness.
Proper maintenance ensures consistent pressure regulation, reduces compressor downtime, and prevents premature component wear.
Why Choose Our Replacement Valve
Our Atlas Copco unloader valve 1622878687 offers a balance of precision engineering, material durability, and long-term stability. With a corrosion-resistant aluminum structure and refined sealing design, it delivers dependable performance under continuous operation. It’s an ideal choice for operators seeking an OEM-level replacement part that combines energy efficiency, operational reliability, and minimal maintenance requirements.
MAECENAS IACULIS
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