Core Technical Advantages
1. 100% Oil-Free Compression: Eliminating the Risk of Oil Contamination
The compressor system operates entirely without lubricating oil; the compression chamber utilizes pure water for sealing, lubrication, and cooling. This ensures zero oil residue in the compressed air at the source, eliminates the need for additional oil-removal equipment, and meets the ISO 8573-1 Class 0 oil-free standard.
2. Isothermal Compression: Energy Efficiency Far Surpassing Dry Oil-Free Screw Compressors
Water-lubrication technology enables near-isothermal compression with operating temperatures below 50°C, preventing energy loss due to overheating:
- Achieves over 15% greater energy savings on average compared to dry two-stage oil-free screw compressors;
- Achieves over 25% greater energy savings on average compared to dry single-stage oil-free screw compressors.
- At the same power rating, the air delivery volume is on average more than 10% higher than that of dry oil-free screw compressors.
3. Ultra-Low Rotational Speed: Extended Service Life
Features a patented airend (ZL 2014 20251586.4) with a large-rotor design and a rotational speed of ≤3000 rpm; it utilizes a direct-drive configuration without a gearbox. Compared to dry oil-free screw compressors (10,000–20,000 rpm), the lower speed results in reduced wear and significantly extended service life.
4. All-Stainless Steel Alloy Airend: Corrosion and Aging Resistance
Both the airend screws and the housing are constructed from stainless steel alloy rather than traditional copper components. This material offers superior corrosion and high-temperature resistance, ensuring stable long-term operation and suitability for demanding environments such as those with high humidity, high salinity, or extreme cold.
5. Wide Pressure Range: Suitable for Diverse Applications
Supports a pressure range of 2 bar to 40 bar and offers customization based on customer requirements, accommodating diverse scenarios ranging from low-pressure/high-flow applications to high-pressure specialized gas requirements.
Product Details
Advanced Smart Features & Low Maintenance
Smart IoT & Remote Management
Equipped with smart cloud house keeping andremote telemetry. Monitor operational parameters,schedule maintenance, and receive instant alerts from anywhere.
01
Automatic Water Exchange & Cleaning
Features periodic automatic water flushing and internal system self-cleaning, ensuring pristine internal hygiene and preventing scale buildup.
02
Simplified Maintenance & Consumables
Streamlined integrated piping reduces fault points.
Minimal consumables (air filters, water filters) require no specialized technician, lowering upkeep costs.
03
Specialized Environmental Customization
Optional intelligent heating systems available for frigid regions, high-altitude installations, and severe outdoor environments.
04
ST Series: Special Process Gas Compressors
- Characteristics of the latest generation of Sollant (the fifth generation) water lubrication oil-free screw air compressor;
- Low temperature characteristics of close to isothermal compression ( temperature of airend is lower than 60℃;
- In a real sense, full stainless steel (arend screw, airend casing are both stainless steel material) corrosion resistance characteristics;
- High efficiency full seal system (adopting imported mechanical seal, and labyrinth seal) ,without leakage;
- There is no direct contact between metals when the compressor airend runs;
- Adopting pure water to seal, lubricate, cool, which can adapt to the requirements of various gas compressors, especially for the
- requirements for explosion-proof air compressor;
- With our own intellectual property rights, all kinds of air compressors can be made according to the requirements of our customers;
- Full stainless steel airend with independent patents;
- Gasoline gas compressors, methane compressors, nitrogen compressors, oxygen compressors and other special gas compressorshave been successfully developed.
Application Scenarios
- Healthcare and Pharmaceuticals (respiratory air, aseptic packaging)
- Food and Beverage Processing (bottle blowing, conveying, fermentation)
- Electronics and Semiconductors (cleanrooms, pneumatic control)
- Chemical and Petrochemical (process gas, instrument air supply)
- Special Gas Recovery and Transport (biogas, oilfield gas)
- High-Altitude/Cold Regions (optional intelligent auxiliary heating system)
FAQ
Q: Is the oil-free screw air compressor truly completely oil-free?
A: Yes. Sollant water-lubricated oil-free screw compressors use no lubricating oil within the compression chamber; instead, pure water is used for sealing, lubrication, and cooling. The output compressed air is absolutely oil-free, eliminating the need for downstream oil removal.
Q: Does the water-lubricated screw air compressor require frequent water changes?
A: The unit features automatic water changing and cleaning functions, with cycles configurable based on the operating environment. Maintenance is simple, and standard purified water meets the water quality requirements.
Q: Is this air compressor suitable for outdoor use or extreme climates?
A: Yes. We offer customized models for extremely cold and high-altitude regions, with optional intelligent auxiliary heating systems to ensure reliable startup and operation in low-temperature environments.
Q: Are the ST series special gas compressors explosion-proof?
A: Yes. The ST series features low operating temperatures (<60°C), a fully sealed design, and no risk of sparks from metal-to-metal contact. With its explosion-proof design, it is suitable for handling flammable and explosive gases such as biogas, gasoline vapors, and oxygen.
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