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Cleanroom Utility Systems
Oil-Free Air Compressor
A sound-enclosed, two-stage water-cooled compressor package that generates clean process air without introducing lubricating oil into the compression chambers.
- Two-stage oil-free compression
- Water-cooled variable-speed package
- Enclosed controls and service access
Product Introduction
The Oil-Free Air Compressor is a packaged utility machine for clean manufacturing processes that cannot accept oil introduced by the compression stage. The selected catalogue identity uses two dry rotary screw stages in series: a larger low-pressure element raises the inlet air to an intermediate pressure, a water-cooled intercooler removes compression heat, and a smaller high-pressure element delivers the final pressure through an aftercooler and moisture separator. Each stage has its own variable-speed permanent-magnet motor, while an enclosed controller coordinates pressure, temperature, cooling-water and condensate functions. The compressor, drive, internal pipework, coolers and control equipment share one sound-attenuating cabinet. This page does not include a receiver, refrigerated dryer, desiccant dryer or downstream sterile filter, which are selected separately for the required storage capacity, pressure dew point and point-of-use air quality.
Key Features
Independent variable-speed drives match both compression stages to changing clean-air demand
Water-cooled intercooler and aftercooler control discharge temperature without a large external cooling-air duct
Integrated moisture separation and automatic drains remove bulk condensate after cooling
Full-color controller monitors pressure, stage temperatures, cooling conditions and maintenance status
Sound-attenuating powder-coated enclosure consolidates the compressor, motors, coolers and electrical controls
Grouped service points and removable front panels support planned inspection without dismantling the air network
Separate flanged air, cooling-water and condensate connections simplify connection to a central utility plant
Customer Product Concerns
Clean process-air generation must control oil risk, pressure stability, compression heat and moisture while remaining serviceable within a continuously operated utility plant.
Oil carried from an oil-injected compression chamber can reach sensitive products or create a difficult downstream removal burdenUse dry oil-free low- and high-pressure screw elements so no lubricating oil is introduced into the compression chambers, then specify downstream treatment for the remaining particle and moisture targets.
A fixed-output compressor may unload repeatedly when cleanroom demand varies across shifts and production stepsCoordinate two variable-speed compression stages from the package pressure controller so delivered flow follows the operating demand within the selected machine range.
Inadequate intercooling raises second-stage inlet temperature and can reduce reliable outputProvide correctly sized cooling-water flow and temperature to the integrated intercooler and aftercooler, with controller supervision of stage and water conditions.
Oil-free compression alone does not define particle, water, microbial or point-of-use qualitySelect the receiver, dryer, filtration, sterile barrier and monitoring train separately from the compressor according to the site's pressure-dew-point and ISO 8573-1 purity-class requirements.
Typical Applications
Pharmaceutical process and instrument-air generation upstream of validated air treatmentSemiconductor and electronics production utilities where compressor-added oil is unacceptableFood and beverage conveying, fermentation and packaging airCleanroom pneumatic controls, valves and production equipmentMedical-device and precision-coating manufacturing air systems
Technical Parameters
The selected image and catalogue configuration is a 90 kW-class, two-stage, water-cooled variable-speed oil-free rotary screw package without an integrated dryer. Its representative 2030 mm by 1660 mm plan and 2000 mm height follow a published enclosed-machine envelope. Actual free-air delivery, working pressure, cooling-water duty and electrical supply are selected for the operating profile rather than treated as universal ratings.
| Core Material | Two dry oil-free rotary screw compression stages, powder-coated carbon-steel acoustic enclosure and stainless-steel water-cooled intercooler and aftercooler surfaces |
|---|---|
| Panel Thickness | Sound-attenuating enclosure panel assembly typically 40-60 mm |
| Effective Width | 1660 mm package depth for the selected water-cooled configuration |
| Maximum Length | 2030 mm overall length for the selected compressor-only package |
| Steel Facing Thickness | Powder-coated formed carbon-steel outer facing typically 1.2-2.0 mm |
| Core Density | Carbon steel approximately 7850 kg/m³ |
| Thermal Conductivity | Carbon steel approximately 48 W/(m·K) at 20°C |
| Surface Finish | Textured warm-white powder-coated cabinet, graphite-black intake grilles and base, with natural stainless utility connections |
| Joint Type | Flanged compressed-air discharge and cooling-water connections, threaded condensate drains and bolted internal service joints |
| Customization | Available based on the intended application and operating environment. |
Available Options
Working-pressure selection within the chosen compressor frameAlternative motor power and free-air-delivery rangeFixed-speed or variable-speed control architectureAlternative cooling-water temperature and heat-recovery arrangementIntegrated heat-of-compression dryer where a combined package is preferredHigh-ambient and outdoor-enclosure preparationRemote Ethernet or fieldbus monitoring interfaceAlternative electrical supply and regional flanged connection standard
Planning a Oil-Free Air Compressor specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
