1. Product Overview
The KOTUMY Silent Oil-free Air Compressor is a versatile and efficient tool designed for a wide range of applications, from home use to industrial tasks. Its oil-free design ensures minimal maintenance and environmental friendliness, while advanced noise reduction technology allows for quiet operation. Available in various capacities, this compressor is built with thickened aluminum parts for durability and features dual protection against power off and overload.


Product Features:
- Oil-free Design: Environmentally friendly and requires no oil addition, extending lifespan.
- Silent Operation: Equipped with 6 noise reduction filters and an industrial-grade silencer for quiet performance.
- Durable Construction: Features thickened aluminum parts for low heating rate and prolonged machine use, along with a 2mm thick seamless welded storage tank.
- High Efficiency: Six-cylinder compression system provides atmospheric volume and quick air delivery.
- Safety Features: Dual protection against power off and overload.
- Portability: Non-slip lightweight foot wheels for convenient movement.
- Versatile Applications: Suitable for tire inflation, automotive beauty, woodworking, home spray painting, industrial assembly, and car maintenance.

2. Setup Instructions
- Unpacking: Carefully remove the air compressor and all accessories from the packaging. Inspect for any damage during transit.
- Placement: Position the compressor on a stable, level surface in a well-ventilated area. Ensure it is used in a stable 220V voltage environment. Avoid privately connecting wires or using plug-in boards that may not provide stable power.
- Accessory Connection:
- Quick Connector: Attach the 5-meter or 8-meter thick spring tube to the quick connector on the compressor's outlet. Ensure a secure fit.
- Tee Joint: If using multiple tools or accessories, connect the tee joint to the compressor's outlet, then attach your desired hoses/tools to the tee joint's ports.
- Dust Blowing Gun: Connect the dust blowing gun to one of the quick connectors or the tee joint as needed.
- Raw Material Belt: This may be used for sealing connections if necessary.
Demonstration of the air compressor's features including noise reduction, quick connections, pressure gauge, and various applications like blowing dust, nailing, spray painting, car maintenance, car grooming, and tire inflation. - Power Connection: Plug the compressor into a suitable 220V power outlet.
- Initial Check: Before starting, ensure all connections are tight and the pressure gauge reads zero or the appropriate starting pressure.
3. Operating Instructions
- Starting the Compressor: Locate the start switch (refer to the component display diagram) and turn it to the 'ON' position. The compressor will begin to build pressure.
- Monitoring Pressure: Observe the accurate pressure gauge to monitor the air pressure. The compressor will automatically stop once the maximum pressure is reached and restart when pressure drops.
- Connecting Tools: Attach your pneumatic tools (e.g., dust blowing gun, spray gun, nail gun) to the quick connectors.
- Adjusting Airflow: If your model includes an adjustable regulator, turn the knob to set the desired working pressure for your tool.
- Using the Compressor: Operate your pneumatic tool as required. The oil-free design ensures clean air output, suitable for spray painting and other sensitive applications.
- Shutting Down: When finished, turn the start switch to the 'OFF' position. Disconnect tools and release any remaining air pressure from the tank by opening the drain valve (if present) or using a tool until the pressure gauge reads zero.

Common Applications:
- Tire Inflation: Use for car, bicycle, or other inflatable items.
- Spray Painting: Ideal for home projects and automotive beauty due to oil-free air.
- Woodworking: Powering nail guns for carpentry tasks.
- Cleaning: Using a dust blowing gun for various cleaning needs.
- Industrial Assembly & Car Repair: Suitable for a range of professional applications.

4. Maintenance
The KOTUMY Silent Oil-free Air Compressor is designed for low maintenance due to its oil-free operation. However, regular checks are recommended to ensure optimal performance and longevity.
- Filter Maintenance: The compressor features HEPA filter screen filtration for fine dust. Periodically inspect and clean or replace the air intake filters to maintain air quality and compressor efficiency.
- Tank Drainage: Regularly drain any accumulated moisture from the air tank to prevent corrosion. This is typically done via a drain valve at the bottom of the tank.
- General Cleaning: Keep the exterior of the compressor clean and free from dust and debris. Ensure cooling fins and fan areas are clear for proper heat dissipation.
- Connection Checks: Periodically check all hoses, fittings, and electrical connections for tightness and signs of wear.

5. Troubleshooting
- Compressor Fails to Start:
- Check power connection and ensure the unit is plugged into a stable 220V outlet.
- Verify the start switch is in the 'ON' position.
- Check for tripped circuit breakers or blown fuses.
- Compressor Stops Unexpectedly:
- The unit has dual protection against power off/overload. If it stops, it might be due to an overload. Allow it to cool down before restarting.
- Ensure proper ventilation to prevent overheating.
- Low Air Pressure/Slow Build-up:
- Check for leaks in hoses or connections.
- Inspect air intake filters for blockages and clean or replace if necessary.
- Ensure the pressure regulator is set correctly for the desired output.
- Excessive Noise:
- While designed for silent operation, unusual noises may indicate a problem. Check for loose components or obstructions.
If troubleshooting steps do not resolve the issue, please contact customer support.
6. Specifications
The KOTUMY Silent Oil-free Air Compressor is available in various models with differing capacities and performance characteristics.
| Specification | 12L Model | 30L Model | 50L Model | 60L Model | 90L Model | 120L Model |
|---|---|---|---|---|---|---|
| Gas Tank Capacity | 12L | 30L | 50L | 60L | 90L | 120L |
| Exhaust Volume | 0.1m³/min | 0.12m³/min | 0.16m³/min | 0.25m³/min | 0.28m³/min | 0.67m³/min |
| Power | 1100W | 1490W | 1490W | 1490W*2 | 1490W*2 | 1490W*3 |
| Rotating Speed | 2800r/min | 2880r/min | 2880r/min | 2880r/min | 2880r/min | 2880r/min |
| Stress (Pressure) | 0.7MPa (100PSI) | 0.8MPa (100PSI) | 0.8MPa (100PSI) | 0.8MPa (100PSI) | 0.8MPa (100PSI) | 0.8MPa (100PSI) |
| Net Weight | 15.7kg | 21.1kg | 28kg | 37.5kg | 41kg | 74kg |
| Product Size (L*W*H) | 47*18*50cm | 55*32*56cm | 55*32*56cm | 64*35*60cm | 74*30*60cm | 100*80*40cm |
General Specifications:
- Power Type: Electric
- Material: Cast Iron
- Certification: CE
- Origin: Mainland China
- Voltage: 220V (Ensure stable voltage environment)

7. User Tips
- Choose the Right Capacity: Consider your primary use case (e.g., occasional tire inflation vs. continuous spray painting) to select the appropriate tank capacity (8L, 12L, 30L, 50L, 60L, 90L, or 120L) for optimal performance and efficiency.
- Stable Power Supply: Always connect the compressor to a stable 220V power source. Fluctuations or insufficient voltage can lead to machine damage and may void the warranty.
- Regular Air Release: After each use, or periodically during extended use, release any remaining air pressure and drain moisture from the tank to prolong its life and prevent internal corrosion.
- Keep Filters Clean: Regularly check and clean the air intake filters to ensure the compressor operates efficiently and provides clean air, especially important for applications like spray painting.
8. Warranty and Support
For warranty claims, technical support, or service inquiries, please contact your original point of purchase or the KOTUMY customer service department. Keep your purchase receipt and product serial number handy when contacting support.
Important Warranty Note: Damage to the machine caused by unstable voltage or improper electrical connections (e.g., privately connecting wires, using unsuitable plug-in boards) is not covered under the warranty.
Product appearance and color may vary due to continuous product upgrades, but the core functions remain consistent.