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The 16.5kW Small Silent Industrial Oil-Free Scroll Air Compressor is a 100% oil-free industrial air compressor with a power rating of 16.5kW (approx. 22HP), utilizing advanced scroll compression technology.
Its working principle is based on the interaction between a fixed scroll and an orbiting scroll to complete the processes of suction, compression, and discharge. The fixed scroll is mounted on the frame, while the orbiting scroll is driven by an eccentric shaft to rotate in a small-radius, smooth motion around the center of the fixed scroll's base circle. There is no metal-to-metal contact between the two scrolls, and no lubricating oil is required inside the compression chamber — ensuring 100% pure, oil-free output air.
This model is characterized by ultra-low noise, compact footprint, and high reliability, with noise levels as low as 45–65 dB(A). It is widely used in applications with strict requirements for air quality, noise levels, and working environment.
| Model | RO-16.5A |
| Air Delivery | 1.65~1.8 m3/min |
| Power | 16.5/22kW |
| Air-end | 5.5kW*3 |
| Noise | 60dB(A) |
| Outlet diameter | G1 1/2 |
| Dimension | 1565*1274*1330mm |
| Weight | 710kg |
No lubricating oil is used in the compression chamber, ensuring completely oil-free output air. Certified by internationally recognized authorities such as TÜV Germany, meeting ISO 8573-1 CLASS 0 zero-oil standards — eliminating all risk of oil contamination and protecting downstream products and equipment.
Extremely low operating noise, typically ranging from 45 to 65 dB(A) — comparable to a library environment or normal conversation level. Some premium models can achieve as low as 52 dB(A). This allows the unit to be installed directly at the point of use without the need for a separate soundproof enclosure.
The scroll compressor has minimal moving parts (only one orbiting scroll in orbital motion), with no reciprocating impact. The scroll set service life can reach tens of thousands of hours, with extremely low failure rates.
Scroll technology offers a 10–15% inherent efficiency advantage over traditional piston compressors, with no clearance volume and volumetric efficiency as high as 89–94%. It maintains excellent efficiency even under partial load conditions. Variable flow technology automatically matches module operation to air demand for optimal energy savings.
Scroll motion is a smooth orbital movement, not the reciprocating impact of piston compressors. The high-pressure zone is evenly distributed around the shaft, with excellent balance and minimal vibration.
No oil separators, oil filters, or other consumables are required. Air filters should be replaced every 2,500 hours or 1 year. Seals should be inspected and replaced every 2,000–8,000 hours as needed. The overall maintenance workload is minimal — often described as "virtually maintenance-free."
Compared to traditional air compressors, the scroll design is compact, lightweight, and space-efficient. It can be installed against the wall for easy system integration.
Discharge temperature ≤ ambient temperature + 15°C, reducing the load on aftercoolers.
Medical & Dental: Medical equipment, ventilators, surgical instruments, dental supply
Laboratory & Research: Microbiology labs, analytical instruments, biotechnology research
Pharmaceutical: Drug production, aseptic filling, compressed air in contact with products
Food & Beverage: Food packaging, pneumatic equipment on processing lines
Electronics & Semiconductor: Precision instruments, PCB manufacturing, semiconductor production
Industrial Manufacturing: Automation equipment, pneumatic tools, spray painting
Agriculture: Agricultural pneumatic equipment
Printing & Coating: Precision printing, spray coating supply
New Energy Transportation: Pneumatic systems for electric buses, conventional and hybrid trucks
Q1: What are the typical air delivery and pressure of the 16.5kW oil-free scroll compressor?
Typical parameters: Air delivery of 1.65–1.8 m³/min, working pressure of 8–10 bar. Speed approx. 3,200 r/min.
Q2: How quiet is it?
Operating noise is typically 45–65 dB(A), with some premium models achieving as low as 52 dB(A) — comparable to a library environment or normal conversation level.
Q3: Is it really 100% oil-free?
The compression chamber is 100% oil-free. However, the motor bearings and drive mechanism use independent grease or lubricating oil that is completely sealed off from the compression chamber and never contacts the compressed air.
Q4: What is the maintenance schedule?
Air filters should be replaced every 2,500 hours or 1 year. Seals should be inspected every 2,000–8,000 hours depending on usage. Overall maintenance is significantly less than that of piston or oil-lubricated screw compressors.
Q5: What are the advantages over piston compressors?
Higher efficiency: 10–15% more efficient, with volumetric efficiency of 89–94% vs. 58–66% for piston units
Lower noise: No reciprocating impact, smooth and quiet operation
Longer service life: Scroll units up to 10,000 hours vs. approx. 1,000 hours for piston units
Less maintenance: No valves, piston rings, or other wear parts
Q6: Can it be placed directly in the workshop?
Absolutely. The ultra-low noise design allows it to be installed at the point of use, eliminating the need for a separate soundproof enclosure.
Q7: What certifications does it have?
Certified by authorities including TÜV Germany, meeting ISO 8573-1 CLASS 0 zero-oil quality standards.
Q8: Is it suitable for 24/7 continuous operation?
Yes. Scroll compressors are designed for continuous operation. Variable flow technology automatically adjusts to air demand, ensuring energy efficiency and reliable performance.
Q9: What are the power supply requirements?
Standard configuration: 380V / 50Hz / Three-phase.
Q10: Does it require a large installation space?
No. Scroll compressors are compact and space-efficient. They can be installed against a wall for easy integration.
