55-900kw Low-Noise Oil-Free Air Compressor

To establish a quiet production environment, importing directly from a reliable China 55-900kw Low-Noise Oil-Free Air Compressor factory is essential. DECHUAN supplies this specialized acoustic-enclosed system with integrated sound-dampening panels and low-noise radial cooling fans. This configuration reduces operational decibels significantly, preventing workshop hearing fatigue.

Structural Acoustic Insulation & Engineering

Traditional large-scale air machinery creates intense low-frequency roaring that damages structural foundations and breaches strict environmental noise standards. This specialized air compressor integrates advanced acoustic engineering directly into the cabinet chassis:

• Precision-Engineered AGMA A5 Gears: The internal power transmission relies on DIN Grade 5 ground helical gears. The micro-backlash design eliminates high-pitch gear whining and mechanical rattling during heavy-duty compression cycles.

• Low-Energy Radial Cooling Fans: Replacing traditional axial blades, our radial cooling assembly moves massive air volumes at lower rotational speeds, cutting aerodynamic vortex noise by over 12 decibels.

• Vibration Isolation Base: The oil-free compressor head sits on heavy-duty, multi-layered elastomer dampening pads, preventing kinetic energy from transferring into surrounding factory floor structures.

Key 55-900kw Low-Noise Oil-Free Air Compressor Technical Parameters

• Power Spectrum: 55 kW to 900 kW continuous heavy-duty output.

• Volumetric Capacity: 4.2 - 148.5 m³/min delivery depending on specific model selection.

• Transmission Standard: AGMA A5 / DIN Grade 5 high-precision gear driving.

• Acoustic Insulation: Multi-thickness internal acoustic foam lining with a sealed IP55 cabinet structure.

Performance reference conditions for the unit were measured according to Annex C, 4th edition (2009) of ISO 1217:

· Relative humidity: 0%

· Absolute inlet pressure: 1 bar

· Inlet temperature: 20°C Discharge rate (FAD) was measured at the following operating pressures:

Constant speed type:

·  -7.5 bar type: 7 bar

· -8.6 bar type: 7 bar

· -10 bar type: 9 bar

VSD type:

· -8.6 bar type: 7 bar

· -10.4 bar type: 9 bar

· (2) Class A weighted emission sound pressure level of the workstation (LpWSAd). Measured according to ISO 2151:2004 (using 150 9614/2 sound intensity scanning method). The newly added correction factor is a completely uncertain value (KpAd), conforming to the test code.

· (3) Weight is for reference only; the actual weight supplied shall prevail.

ZR/ZT 110-160 (FF) STD

According to ISO 1217 Annex C, 4th Edition (2009), the unit performance reference conditions are as follows:

· Relative humidity: 0%

· Absolute inlet pressure: 1 bar

· Inlet temperature: 20°C

Displacement FAD is measured at the following operating pressures:

Constant speed models:

-7.5 bar models: 7 bar

-8.6 bar models: 7 bar

-10 bar models: 9 bar

VSD models:

-8.6 bar models: 7 bar

-10.4 bar models: 9 bar

(2) Class A weighted emission sound pressure level of the workstation (LpWSAd). Measured according to ISO 2151:2004 (ISO 9614/2 sound intensity scanning method). The newly added correction factor KpAd is uncertain, complying with test code.

(3) V1=380V, V2=400V.

(4) Weight is for reference only; actual weight shall prevail.

ZR/ZT 200-275 (FF)

-Relativehumidity:0%

-Absolute inlet pressure: 1bar

-Inlet temperature:20°℃

Discharge rate (FAD) was measured at the following operating pressures

Constant speed type:

-7.5 bar type: 7 bar

-8.6 bar type: 7 bar

-10 bar type: 9 bar

VSDtype:

-8.6 bar type: 7 bar

-10.4 bar type: 9 bar

(2) Class A weighted emission sound pressure level of the workstation (LpWSAd).

Measured according to ISO 2151:2004(using 150 9614/2(sound intensity scanning method).

The newly added correction factor is a completely uncertain value (KpAd), conforming to the test code.

(3) Weight is for reference only; the actual weight supplied shall prevail.

ZR 300-750

Performance reference conditions for the unit were measured according to Annex C, 4th edition (2009) of ISO 1217:

· Relative humidity: 0%

· Absolute inlet pressure: 1 bar

· Inlet temperature: 20°C Discharge rate (FAD) was measured at the following operating pressures:

Constant speed type:

·  -7.5 bar type: 7 bar

· -8.6 bar type: 7 bar

· -10 bar type: 9 bar

VSD type:

· -8.6 bar type: 7 bar

· -10.4 bar type: 9 bar

· (2) Class A weighted emission sound pressure level of the workstation (LpWSAd). Measured according to ISO 2151:2004 (using 150 9614/2 sound intensity scanning method). The newly added correction factor is a completely uncertain value (KpAd), conforming to the test code.

· (3) Weight is for reference only; the actual weight supplied shall prevail.

ZR 200X-400X

Performance reference conditions for the unit were measured according to Annex C, 4th edition (2009) of ISO 1217:

· Relative humidity: 0%

· Absolute inlet pressure: 1 bar

· Inlet temperature: 20°C Discharge rate (FAD) was measured at the following operating pressures:

Constant speed type:

·  -7.5 bar type: 7 bar

· -8.6 bar type: 7 bar

· -10 bar type: 9 bar

VSD type:

· -8.6 bar type: 7 bar

· -10.4 bar type: 9 bar

· (2) Class A weighted emission sound pressure level of the workstation (LpWSAd). Measured according to ISO 2151:2004 (using 150 9614/2 sound intensity scanning method). The newly added correction factor is a completely uncertain value (KpAd), conforming to the test code.

· (3) Weight is for reference only; the actual weight supplied shall prevail.

Real-World Application in the Furniture and Packaging Industry

In packaging and furniture manufacturing plants located near commercial areas, noise pollution is a continuous legal risk. DECHUAN deployed this specific 55-900kw Low-Noise Oil-Free Air Compressor to a high-density packaging factory. By replacing older, vibrating piston systems with this sound-insulated screw structure, the plant dropped its boundary noise levels to comply fully with local standards, avoiding thousands in recurring regulatory fines.

Factory Quality Assurance & Compliance Testing

• Full-Load Anechoic Chamber Testing: Units are run at maximum 900kw capacity in specialized sound chambers to map precise acoustic profiles across all frequencies.

• Dynamic Balancing of Rotors: Premium coated rotors are dynamically balanced to eliminate micro-wobbles that cause long-term bearing wear and structural noise.

• TÜV Class 0 Oil-Free Certification: Strict laboratory analysis confirms zero oil content in the compressed airflow, guaranteeing pure gas alongside quiet operation.

Industrial Buyer FAQ

Q: Does the soundproof acoustic enclosure cause heat buildup during hot summer months?

A: Not at all. The internal ventilation relies on a high-static pressure radial cooling fan that creates a negative pressure zone inside the cabinet. Cool air is sucked through targeted ducting directly across the stainless steel precooler and discharged upwards, maintaining a stable internal temperature even in 50°C ambient plant environments.

Q: Why are DIN Grade 5 gears so critical for reducing factory floor noise levels?

A: Standard industrial air units often use lower-grade gears that develop micro-backlash over time, causing a metallic chattering sound under high torque. Our DIN Grade 5 gears feature teeth profiled with micrometer precision, ensuring seamless mesh contact that minimizes both mechanical friction sound and power transmission loss.

Q: Can we install this low-noise compressor right next to our assembly operators?

A: Yes. Because the structural acoustic lining absorbs high and mid-frequency air resonance, the exterior decibel profile is significantly lower than standard open-frame machinery. This allows factories to eliminate long, expensive piping runs by placing the 55-900kw Low-Noise Oil-Free Air Compressor closer to the actual production line.