Description
The SM/SH/SL37–75 series Ingersoll Rand Sierra® oil-free screw air compressors are engineered to deliver high-purity compressed air for demanding industrial applications where reliability, energy efficiency, and zero oil contamination are critical.
Designed with advanced two-stage compression technology and certified to ISO 8573-1:2010 Class 0 air standards (TÜV Rheinland® verified), this series ensures completely oil-free air output suitable for food processing, pharmaceuticals, electronics manufacturing, and other precision industries.
Advanced Energy-Efficient Drive System
The compressor is equipped with a high-efficiency IE4-class motor operating at 380–415V, 3-phase, 50Hz. The fully enclosed TEFC design ensures stable performance under harsh industrial conditions while minimizing energy losses. Combined with a star-delta starter and intelligent load/unload control, the system provides smooth operation and reduced starting stress.
Intelligent Control & IoT Integration
The Luminance smart controller offers a user-friendly interface with bilingual (Chinese/English) display and full system monitoring. Built-in RS485 Modbus RTU communication enables seamless integration into industrial automation systems, while standard IoT functionality allows remote monitoring and predictive maintenance capabilities.
Two-Stage Oil-Free Compression Technology
The core of the Sierra® series is its robust two-stage screw airend design. By distributing compression across two stages, thermal load is significantly reduced, improving efficiency and extending service life. Stainless steel rotors with patented UltraCoat™ surface treatment ensure stable airflow, reduced leakage, and long-term performance consistency.
UltraCoat™ Rotor Protection Technology
Ingersoll Rand’s exclusive UltraCoat™ coating utilizes a molybdenum disulfide-based composite applied via robotic spraying. This ensures uniform coverage and excellent adhesion, significantly reducing wear and maintaining volumetric efficiency over time. Compared to conventional coatings, UltraCoat™ helps prevent efficiency loss and reduces total operating costs.
Triple-Seal Oil Isolation System
A unique triple-seal structure completely isolates the lubrication system from the compression chamber:
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Stainless steel barrier seal prevents air-oil cross contamination
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Labyrinth seal minimizes internal oil migration
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Drain seal ensures safe discharge in case of leakage
This architecture guarantees true oil-free compressed air output.
High Ambient Temperature Capability
The Sierra® series is designed for reliable operation in environments up to 46°C. Whether air-cooled or water-cooled, the system maintains stable performance even in high-temperature and high-humidity industrial conditions.
Reliable Mechanical Design
Each compression stage is equipped with high-precision roller and angular contact bearings to handle both radial and axial loads. This reduces rotor clearance variation, enhances efficiency, and significantly improves long-term reliability.
Low Noise & Compact Structure
The sound-insulated enclosure ensures a noise level of approximately 79 dB(A), making it suitable for installation in production environments requiring reduced acoustic impact. Compact dimensions allow flexible installation in limited spaces.
Industrial Applications
This compressor series is widely used in:
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Pharmaceutical and medical production
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Food and beverage processing
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Electronics and semiconductor manufacturing
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Chemical and petrochemical plants
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Precision instrumentation industries
Technical Highlights
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Power range: 37–75 kW
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Voltage: 380–415V / 3Ph / 50Hz
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Protection: IE4 TEFC motor
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Cooling options: air-cooled / water-cooled aftercooler
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Control system: Luminance smart controller with IoT
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Communication: Modbus RTU (RS485)
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Noise level: 79 dB(A)
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Structure: two-stage oil-free screw compression
Conclusion
The SM/SH/SL37–75 Ingersoll Rand Sierra® compressor series combines advanced engineering, intelligent control systems, and proven oil-free technology to deliver maximum efficiency and air purity. It is a reliable long-term solution for industries requiring consistent high-quality compressed air with minimal lifecycle cost.
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