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Ingersoll Rand Air End CD8D I=2.975 Dry Oil-free Screw Air Compressor Head Screw Pump

1. Flow rate: 337~748 m3/h/ 198.3~440cfm
2. Power: 29~97.3 kW/39~130hp
3. Working pressure: 4.5~11.5 bar/65.25~167 psig
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The CD8D is a dry, oil-free screw airend designed and manufactured by Ingersoll Rand. It serves as the core power component of medium-to-large oil-free screw compressors.


Internal Compression Ratio I=2.975: This is the core characteristic of this model. It indicates a design compression ratio of approximately 2.975:1 within the airend. This ratio is fixed and determined by the rotor profile and length. It is typically optimized for optimal operating efficiency at a discharge pressure of approximately 0.8 MPa (or 8 bar).


Simply put, the CD8D I=2.975 is a highly efficient, pure air-powered heart tailored for common operating pressures (e.g., 8 bar).


Product features

The CD8D airend inherits the core advantages of Ingersoll Rand's oil-free technology and, combined with its unique internal compression ratio, offers the following features:


1. 100% oil-free, Class 0 compliant. 

Advanced sealing technology completely isolates the compression chamber from the gearbox and bearing housing, preventing oil vapor from entering the compressed air stream. This ensures the highest air purity, meeting ISO 8573-1 Class 0 certification.


2. Optimized internal compression ratio for high efficiency and energy savings. 

The I=2.975 design achieves peak efficiency near the target operating pressure (e.g., 8 bar). Energy loss is minimized when the airend's internal compression ratio matches the required external compression ratio of the pipeline network.


3. Advanced rotor profile technology. 

Ingersoll Rand's patented rotor tooth design delivers high efficiency, excellent leakage control, and high volumetric efficiency.


4. High reliability and long life.

High-quality bearings, high-precision synchronous gears, and a robust airend structure are employed. The rotors are typically specially coated for wear and corrosion resistance.


5. Easy Maintenance

As a modular core component, its design allows for easy maintenance and upkeep.


Technical Parameters

ModelCD8D
Power (kW)29~97.3

Flow (m3/H)

337~784
Pressure (bar )4.5~11.5
Dimensions(mm)810*700*840
Weight(kg)560


Application 


The CD8D airend, known for its oil-free, reliable, and efficient design, is primarily targeted at critical industries with stringent air quality requirements or cost-sensitive operating conditions. It is typically integrated into Ingersoll Rand complete systems (such as centrifugal compressors or medium- to large-sized oil-free screw compressors) and is used in the following areas:


1. Food, Beverage, and Brewing Industries: Direct product contact applications such as mixing, fermentation, packaging, filling, and blow molding.


2. Pharmaceutical, Biotechnology, and Medical Device Industries: Pharmaceutical raw material handling, fermentation tank aeration, laboratory pneumatic equipment, and packaging lines.


3. Electronics and Semiconductor Industries: Chip manufacturing, printed circuit board (PCB) cleaning, LCD panel production, and precision component testing.


4. Chemical and Petrochemical Industries: Process control instrument air, material handling, reactor mixing, and more, especially in applications involving the handling of flammable, explosive, or highly reactive chemicals.


5. High-end Manufacturing and Automotive Industries: Precision spray coating, robotic control, and testing equipment.


6. Hospitals and Medical Centers: Centralized hospital air supply systems power ventilators, operating room equipment, and dental instruments.

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