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It is an oil-free rotary screw compressor in which the compression chamber is sealed, cooled and lubricated by pure water instead of oil. The screw elements are made of corrosion-resistant materials, and water is separated and recirculated after compression, delivering 100% oil-free compressed air — the purest output available from a screw compressor.
The water-lubricated design guarantees oil-free air to ISO 8573-1 Class 0, meaning no oil contamination of any kind. Water remaining in the air is easily removed by the integrated separator and optional dryer, making it ideal for the most demanding applications.
Any process that requires completely oil-free air: food & beverage processing and bottling, pharmaceuticals and biotechnology, PET bottle blowing, electronics and semiconductors, chemical, textile, and sensitive packaging lines. It is also widely used where oil-lubricated compressors are prohibited by regulation or quality standards.
An oil-lubricated unit always carries a risk of oil carryover, no matter how good the filtration. Water-lubricated compressors eliminate oil from the compression process completely, so you get Class 0 air without expensive downstream filtration — lower contamination risk, lower maintenance and no oil disposal cost.
Water provides excellent sealing and cooling inside the compression chamber, so water-lubricated units are significantly more energy efficient than dry-running screw compressors — often 15–20% lower energy consumption. They also run cooler, quieter and more reliably over long duty cycles, with lower total cost of ownership.
The water is separated, cooled and recirculated inside the machine with automatic make-up. Maintenance includes periodic water replacement (typically every 2,000–4,000 hours) and checking the water level, filters and separator. We supply a full maintenance kit and clear schedule, so the workload is simple and low-cost.
Our system is designed to work with purified or deionized water, and we can provide an optional water treatment or dosing system. The machine monitors water conductivity and flow automatically, and the controller prompts you when water replacement or service is needed, protecting the screw elements for a long service life.
Our water-lubricated series typically covers 8–10 bar with capacities from about 1.5 to 15 m³/min, covering mid-size and large-scale clean air demands. Confirm your required flow, pressure and working hours and we will recommend the best model, including tank and dryer packages.
Yes. As the manufacturer, we support voltage/frequency customization (220V/380V/415V, 50/60Hz), pressure settings, drying and filtration configurations, control systems, color, and OEM/ODM branding with your logo and packaging. Skid-mounted and container-type solutions are also available for large projects.
Our factory is ISO 9001 certified and the machines carry CE certification, with additional certificates (e.g. food-grade or country-specific) available on request. We offer a 12-month warranty (extendable), 24/7 remote technical support, installation guidance, and long-term spare parts supply with fast dispatch.
Because water seals and cools the compression chamber more effectively than air, water-lubricated units typically consume 15–20% less energy than equivalent dry-running oil-free screw compressors. Over a machine's lifetime, energy represents the largest operating cost, so this saving usually covers the price difference within the first 1–2 years of operation.
Water cooling keeps the compression temperature low and operation smooth, so these units are noticeably quieter than dry oil-free types — typically 65–75 dB(A) with the soundproof enclosure, and lower for smaller models. No special soundproofing room is required for most production environments.
The compressor delivers oil-free air at the source, but for most processes we still recommend a refrigerated dryer to remove water vapor if the application is moisture-sensitive, and a particulate filter at the point of use. We supply complete packages — compressor, dryer, receiver tank and filtration — so you receive a turnkey clean air system sized to your required air quality class.
Installation is similar to a standard screw compressor: a level floor with adequate clearance for ventilation and service access, plus power, air piping and a condensate drain connection. We provide a full installation manual and commissioning guide, and our engineers offer remote video guidance for first startup.
Standard models ship within 15–30 days after order confirmation; customized units take 30–45 days depending on configuration. Every machine is export-packed in reinforced wooden/steel crates suitable for sea freight, and we handle all export documentation for FCL or LCL shipment.
We stock all wearing parts — water filters, air filters, seals, separators and controller components — and guarantee parts supply for over 10 years after purchase, with most common parts dispatched within 3–7 days. This keeps your machine running with minimal downtime.
MOQ is flexible and depends on the model — typically 1 unit for standard models. We accept T/T, L/C and Alibaba Trade Assurance; the process is simple: configuration confirmation → proforma invoice → payment → production with progress updates → inspection → shipment.
Yes. Our standard units are rated for ambient temperatures up to 40–45°C, and high-temperature versions are available for tropical or foundry conditions. In humid climates, the integrated moisture separator and a correctly sized dryer ensure stable air quality. Tell us your site conditions and we'll configure the right package.
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Screw Air Compressor,
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