Core Advantages of Oil-Cooled Air Compressors
Oil-cooled air compressors use lubricating oil for cooling, lubrication, and sealing. Compared to oil-free models, their advantages focus on efficiency, stability, and cost. Specifically, they are as follows:
1. High Efficiency and Low Energy Consumption
The lubricating oil quickly absorbs the heat of compression, keeping the compression temperature at 80-120°C (dry oil-free models typically have a temperature of 180-220°C), reducing heat loss and lowering energy consumption by 8%-15%. It also prevents heat deformation of the die, keeping the exhaust volume reduction rate to within 3% over long-term operation (dry oil-free models experience a 5%-10% reduction over 1-2 years).
2. Strong Stability and Long Life
The lubricating oil forms an oil film that reduces mechanical wear, resulting in a core die life of 80,000-120,000 hours (dry oil-free models have a 40,000-60,000 hour life). It also seals gaps and blocks impurities, resulting in an average annual failure rate of 3%-5% (dry oil-free models have an 8%-12% annual failure rate).
3. Controllable Costs, High Cost-Effectiveness
- Procurement: Simple structure, 30%-50% lower cost than dry oil-free models;
- Operation and Maintenance: Only regular oil changes and oil filters are required (every 2,000-4,000 hours, 200-500 yuan per change), significantly lower than dry oil-free models (300-1,000 hours, 800-1,500 yuan per change);
- Energy Consumption: Long-term operation saves an average of 10,000-50,000 yuan in electricity costs annually.
4. Wide Range of Applications
Provides a stable output pressure of 0.7-3.0 MPa and a displacement of 0.1-100 m³/min, suitable for medium-to-high pressure and large displacement requirements in machinery manufacturing, chemical engineering, and other industries. It can operate in temperatures between -10°C and 45°C (dry oil-free models are generally limited to 35°C).
Note: Because the compressed air contains trace amounts of oil mist (residual oil content of 3-5 ppm), it is not suitable for applications requiring absolute oil-free operation, such as food, electronics, and medical applications.
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