Air compressors make noise due to the movement of pistons or rotors, air suction and exhaust, and vibrations caused by the unit.
What is an Air Compressor Noise?
Air compressors generate noise due to the movement of pistons or rotors, air suction and exhaust, and vibrations caused by the unit. The noise level of a compressor is typically measured in decibels (dB).
For reference, a typical conversation is around 60 dB, while a lawnmower can reach up to 90 dB. Air compressors can range from 70-85 dB, depending on the type and model.
Why Do Air Compressors Make Noise?
- Internal elements’ movement: The movement of pistons or rotors within the compressor creates mechanical noise.
- Air suction and exhaust: The process of sucking in air and exhausting it at high pressure generates noise.
- Vibrations: Vibrations from the compressor unit can cause rattling and additional noise.
Why Choose a Low Noise Air Compressor?
Choosing a low noise compressor offers several benefits:
- Improved Work Environment: A quieter compressor creates a more pleasant and productive workspace.
- Health and Safety: Prolonged exposure to high noise levels can cause hearing damage. Low compressor noise reduces this risk.
- Compliance with Regulations: Some industries have strict noise regulations. Low noise compressors help meet these standards.
- Enhanced Communication: In quieter environments, communication between team members is easier and more effective.
Apply to a silent or low-noise compressor increases the productivity of your employees and, thus, your productivity.
What are the Common Causes of Compressor Noise?
A highly noisy compressed air systems can be very annoying for your employees and reduces your productivity. To avoid effective issues, identifying compressors’ noise is mandatory. The main causes of an high noise level are:
Normal Operation: Most air compressors produce some level of noise due to their mechanical nature. However, excessive noise may indicate an underlying issue.
Refrigerant Issues: In air conditioning units, the refrigerant responsible for temperature control can cause noise if it floods into the compressor crankcase, especially during startup.
Loose Parts: Loose parts within the compressor unit, such as bits and pieces of material that came loose during delivery or due to wear and tear, can cause rattling noises.
Oil Leaks: Leaking oil can cause the compressor to make noise as lubrication becomes an issue, leading to increased friction and noise.
Capacitor Issues: The capacitor within the compressor unit can cause humming noises and affect the functionality of the motor.
Strategies for Silencing an Air Compressor
There are several effective strategies to reduce air compressor noise. Most of them can be directly applied within your company and they are:
Choosing a Quieter Model: Investing in a low noise air compressor is the most straightforward solution. Look for models specifically designed to operate quietly.
Proper Placement: Placing the compressor in a dedicated room or outside, away from work areas, can significantly reduce noise levels.
Enclosures and Sound-Dampening Materials: Enclosing the compressor or adding sound-dampening materials, such as foamboard or sound blankets, can help reduce noise.
Intake Silencers: Installing an intake silencer can cut down on the sound produced by the rush of air and reduce the overall noise level.
Absorbing Vibrations: Using rubber mats or grommets to absorb vibrations can help reduce noise caused by the compressor's movement.
Building a Soundproof Box: A soundproof box can encapsulate the compressor, reducing noise. Ensure the box has ventilation to prevent overheating.
Maintenance Tips for Reducing Air Compressor Noise
Scheduled regular maintenance is crucial for keeping your air compressor running quietly:
- Lubrication: Proper lubrication of moving parts reduces friction and noise. Check and change the oil regularly.
- Tightening Loose Bolts and Screws: Vibrations over time can cause bolts and screws to loosen, leading to rattling noises. Regularly check and tighten them.
- Changing Filters: Dirty filters can cause the compressor to work harder, increasing noise. Change intake filters when visibly dirty and inline filters at least once a year or after 8,000 hours of operation.
- Checking for Leaks: Inspect the compressor for oil leaks and address them promptly to prevent lubrication issues and noise.
Choosing the Right Low Noise Air Compressor
When selecting a low noise air compressor, consider the following factors:
Noise Level: Look for compressors with a noise level below 70 dB for a quieter operation.
Type of Compressor: Rotary screw compressors are generally quieter than reciprocating compressors. Choose the type that best suits your needs.
Size and Power: Ensure the compressor has the right capacity and power for your applications while maintaining a low noise level.
Additional Features: Some compressors come with built-in noise reduction features, such as intake silencers and sound-dampening enclosures.
Get in touch with the expert
Low noise air compressors offer numerous benefits, from creating a more pleasant work environment to protecting your hearing. By understanding the common causes of air compressor noise and implementing effective noise reduction strategies, you can enjoy a quieter and more efficient workspace.
Scheduling regular maintenance and choosing the right low noise compressor are key to achieving optimal performance and noise reduction. If you have any questions or need further assistance, feel free to reach out to our team of experts.
Frequently Asked Questions
Typical noise levels for air compressors can range from 70-75 dB for typical rotary screw compressors, and up to 85 dB for reciprocating compressors.
Intake filters should be changed when visibly dirty or worn, and inline filters should be changed at least once a year or after 8,000 hours of operation.
Maintenance is important for reducing air compressor noise because vibrations over time can cause things to loosen up, leading to excessive rattling and increased noise levels. Proper lubrication and changing filters can also lead to a quieter machine.
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