Atlas Copco Screw Air Compressors Shut-off Valve 1604610980 1604610981
The Atlas Copco shut-off valve (1604610980 / 1604610981) is designed for precise airflow isolation and reliable pressure control within oil-injected screw compressor systems. Built with a reinforced valve core, stable sealing structure, and corrosion-resistant materials, it ensures dependable and durable operation in demanding industrial environments.
| Application |
Screw Air Compressor |
|---|---|
| Material |
Stainless Steel |
The shut-off valve 1604610980 / 1604610981 is a critical isolation component used in the internal pneumatic network of Atlas Copco screw air compressors. Its primary function is to provide a stable and complete interruption of airflow when required—either during staged shutdowns, safety isolation, or controlled pressure transitions inside the compressor housing. This valve is engineered specifically for the airflow characteristics and oil-mixing conditions found in the GA series and similar Atlas Copco platforms, ensuring compatibility with their pressure-balanced system architecture.
What distinguishes this valve from general shut-off components is its enhanced resistance to oil-rich air, its precise control of internal backpressure, and its structural stability under repetitive load cycles.
Engineering Design & Internal Valve Structure
This model utilizes a compact yet structurally reinforced body that supports long-term stability even under high-frequency open–close cycles. The internal valve core adopts a robust seat-to-disc engagement design, which reduces micro-movement during operation and significantly minimizes internal turbulence when the valve is partially open.
The flow channel is polished to reduce friction and ensure a smooth airflow path, helping maintain a consistent pressure field inside the compressor. This is especially critical for Atlas Copco systems, where the slightest pressure fluctuation can affect the performance of the inlet valve, minimum pressure valve, and oil-air separation sequence.
The valve’s internal guiding mechanism is precisely aligned so the stem moves vertically without offset, preventing uneven wear or side-loading—a common cause of leakage in lower-quality replacement valves.
Sealing System Optimized for Oil-Injected Airflow
Inside an Atlas Copco screw compressor, the air stream contains oil mist at elevated temperature. The sealing materials of this shut-off valve are specifically selected to resist swelling, hardening, and deformation caused by long-term oil exposure. The elastomer seals maintain elasticity even under thermal cycling, ensuring the valve closes tightly without requiring excessive spring force.
This design helps the valve achieve:
- Lower internal leakage
- More stable isolation at shutdown
- Reduced energy loss caused by pressure decay
- Longer serving life even in continuous-duty conditions
The seat surface is treated to maintain its shape and avoid micro-indentation, which ensures consistent sealing performance for the entire lifespan of the valve.
Material Strength, Surface Protection & Corrosion Control
Both 1604610980 and 1604610981 feature high-grade alloy materials with enhanced resistance to oxidation and oil vapor. The external surface is treated with an industrial anti-corrosion coating that prevents failure from moisture condensation, hot oil contact, or environmental contaminants.
The body can withstand pressure spikes during startup and depressurization, maintaining mechanical stability throughout rapid transitions. Internal components are coated or treated to reduce friction, lowering wear on the valve seat and improving long-term reliability.
Dynamic Response & Operational Stability
One of the key design strengths of this valve series is its balanced actuation behavior. The opening and closing movement is smooth and predictable, preventing shock loads or vibration transmission into adjacent components such as pipelines, cooler connections, and the separator tank interface.
This controlled response is especially valuable in Atlas Copco compressors that operate in variable load cycles, where pressure levels shift frequently. The valve prevents pressure rebound, ensuring the compressor’s internal regulation stays consistent.
Installation Compatibility & System Integration
The shut-off valve 1604610980 / 1604610981 fits directly into Atlas Copco compressor air-oil circuits using its standardized mounting interface. The connector surfaces and threading are machined to tight tolerances, allowing the valve to mate securely with the compressor’s internal aluminum or steel piping.
Its installation locations typically include:
- Separator tank outlet sections
- Air–oil circuit isolation points
- Internal distribution manifolds
- Cooling module junctions
- Service and safety isolation zones
Once installed, the valve requires no frequent adjustment. A simple pressurization check is recommended to verify sealing performance after installation.
Performance Benefits
Using this valve in your Atlas Copco compressor ensures several advantages:
- Stronger airflow isolation
- Reduced leakage during shutdown or service
- Improved pressure stability during load changes
- Longer service life under oil-rich, high-temperature conditions
- Consistent internal airflow balance for optimal compressor efficiency
- Lower maintenance frequency
This reliability directly contributes to reduced downtime and enhanced operational safety.
MAECENAS IACULIS
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ADIPISCING CONVALLIS BULUM
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