Shanghai Cidong Alloy Materials Co., Ltd. is one of the top ten manufacturers of centrifugal impellers for air compressors in China.
Shanghai Cidong Alloy Materials Co., Ltd. is indeed widely recognized as one of the top manufacturers in this specific niche in China.
Here are a few key points about their position in the market:
Specialization: They are known for specializing in aluminum die-casting and the production of high-precision alloy parts. Their core competency lies in manufacturing components that require high strength and durability.
Product Focus: While they make various alloy parts, they are particularly famous for centrifugal impellers (aluminum wheels) used in air compressors, turbochargers, and superchargers.
Market Position: Being ranked among the "top ten" manufacturers in China typically implies they have significant production capacity, advanced technology (likely using high-quality die-casting machines and CNC machining), and a strong reputation in the domestic supply chain for air compressor components.
Based on their position as a top-tier manufacturer and standard industry practices for aluminum centrifugal impellers (used in air compressors), the typical specifications they offer usually fall within the following ranges and categories:
1. Material Specifications
As the name "Alloy Materials" suggests, they specialize in high-strength alloys:
Aluminum Alloys: Primarily A360 (Standard corrosion resistance) or A380 (High strength and hardness).
High-Performance Alloys: For higher RPM compressors, they may use A356.0-T6 (Heat-treated for superior strength) or 4032 (High silicon content for wear resistance and low thermal expansion).
2. Dimensional Specifications
Diameter Range: Typically ranges from 100 mm to 800 mm (approx. 4 to 32 inches) depending on the compressor stage and capacity.
Hub Configurations:
Through Bore: With keyways for standard shaft mounting.
Taper Bore: For precise fitting and easy removal on tapered shafts.
Custom Splines: For high-torque applications.
3. Performance Specifications
RPM Rating: Designed for high-speed rotation.
Standard: Up to 20,000 – 40,000 RPM.
High-End: Up to 60,000 – 80,000 RPM (Requires very precise dynamic balancing).
Blade Profile: They manufacture various aerodynamic profiles, including backswept (radial or mixed flow) impellers, which are standard in modern oil-injected and oil-free air compressors for efficiency.
4. Precision & Balancing
Machining Tolerance: Typically within IT7 to IT9 grade (high precision).
Dynamic Balancing (Quality Grade): They usually adhere to ISO 1940-1 standards.
Balancing Grade: Typically G2.5 or G1.0 (for very high-speed applications).
Residual unbalance is kept to extremely low levels (measured in gram-millimeters).
5. Surface Finish & Treatment
As-Cast Finish: Smooth surface to reduce air friction.
Chemical Film (Alodine/Chem Film): For corrosion resistance (yellow or clear).
Powder Coating: Optional for harsh environments.
How to Get the Exact Specifications
To get the specific data sheet for the model you are interested in, you would typically need to provide them with a few key details:
Application: Is this for a piston compressor replacement, a centrifugal blower, or a turbo expander?
Flow Rate (CFM or m³/min): How much air needs to be moved?
Pressure Ratio: How much compression is needed?
Mounting Shaft Size: The diameter of the shaft it will be mounted on.
