LUT 355-2000kW Oil-Free Centrifugal Compressors

Relying on the advanced compression technology of the Atlas Copco Group, Liutech has launched the LUT 355-2000kW Oil-Free Centrifugal Compressors. These compressors provide customers with an optimized solution that features low energy consumption, high cost-effectiveness, stability and reliability, easy installation, convenient maintenance, and a focus on environmental protection.

They are widely used in industries such as steel, metallurgy, petrochemicals, air separation, shipbuilding, electronics, textiles, food, and biopharmaceuticals, continuously earning greater recognition and trust from users.

Product Introduction

The LUT 355–2000 series from Lutech covers a power range of approximately 355–2000 kW, with a corresponding free air delivery (FAD) of roughly 70–340 m³/min. Operating pressures typically range from 5.5 to 13 bar(g), meeting the compressed air requirements for medium- to high-pressure piping networks in large-scale industrial facilities. The LUT 315–2000 series offers three-stage compression models, balancing energy efficiency, footprint, and pressure requirements.

Designed for high-voltage industrial power systems, the main motor is compatible with 6 kV or 10 kV power supplies, while the control system operates on 380 V. The integrated design incorporates intercoolers and aftercoolers for continuous operation, helping to maintain discharge temperatures within a range suitable for downstream drying and post-treatment equipment.

Product Advantages

Reasonably coordinated layout, fewer moving parts, and user-friendly component design comprehensively improve the cost-effectiveness of oil-free centrifugal compressors, providing customers with fully oil-free compressed air

Advanced Inlet Guide Vane (IGV) Adjustment Mechanism The advanced IGV adjustment mechanism allows stepless adjustment with precise positioning, effectively regulating performance under partial load. Electric or pneumatic actuators are optional. High-Precision Gear Transmission Uses large and small gears that meet the AGMA Q13 / DIN 5 precision standards of the American Gear Manufacturers Association, enhancing mechanical reliability, interchangeability, and compressor mechanical efficiency, while also reducing noise. Complete Lubrication System Fully welded oil tank with large inspection openings. Oil sight glass and electronic low-oil-level alarm with shutdown function. Full-flow auxiliary oil pump, automatically starts at low oil pressure. Economical and Comprehensive Control System Rare differential pressure ratio surge prediction function. User-friendly interface, easy to operate. More complete display of operating parameters and status, alarms, shutdowns, etc. Optional communication interfaces such as Modbus and Profibus. Adjustable Blow-Off Valve Constant-pressure control mode provides continuously stable compressed air. Automatic dual-mode control for energy savings according to actual changing operating conditions. Electric or pneumatic actuators optional.

Integrated Exhaust Check Valve High-quality, corrosion-resistant check valve. Metal-to-metal sealing, low pressure drop. High-Quality Cooler Integrated design, high heat exchange efficiency, reduced pressure drop. Straight-tube design: water flows through tubes, air flows through shell; front and rear covers for easy cleaning. Equipped with automatic and manual drain valves. Maintenance-Free Coupling Maintenance-free disc-type coupling ensures continuous compressor operation. Stainless-steel discs for high reliability. Oil Mist Breather Electric exhaust fan removes oil mist without consuming air. Negative pressure principle prevents oil leakage. Proper Anti-Corrosion Design All air-path components coated with special DuPont resin for excellent corrosion resistance. High reliability with low maintenance costs. Unique Micro-Spline Connection Excellent design allows easy assembly/disassembly without damaging components. Repeated disassembly with no wear and precise positioning. Capable of transmitting power up to 10,000 kW.

LUT 355-2000kW Oil-Free Centrifugal Compressors Technical Scope

LUT 355-2000kW Oil-Free Centrifugal Compressors Flow Diagram

▆▆ Air ▆▆ Oil ▆▆ Water ①Inlet Air Filter ②Inlet Guide Vanes ③Horizontally Split Gearbox ④First-Stage Impeller ⑤First-Stage Intercooler ⑥Third-Stage Impeller ⑦Second-Stage Intercooler ⑧Third-Stage Impeller ⑨Aftercooler (Optional) ⑩Blow-Off Valve ⑪Discharge Check Valve ⑫Oil Tank ⑬Oil Heater ⑭Oil Mist Breather ⑮Main Oil Pump ⑯Auxiliary Oil Pump ⑰Oil Cooler ⑱Oil Temperature Control Valve ⑲Duplex Oil Filter

Maintenance Tips

Oil-free centrifugal technology minimizes wear along the compression path and eliminates the need for oil changes within the air circuit, thereby reducing maintenance requirements related to contamination. Key components—such as impellers, seals, and bearings—are engineered for extended service intervals, while the base layout ensures that instruments, coolers, and filters remain accessible from outside the unit. This simplifies routine inspections, cleaning, and replacement tasks, helping to shorten planned downtime.

By following the Lutech  maintenance schedule and incorporating proper operational monitoring, LUT series units achieve predictable maintenance cycles and high equipment availability. The platform supports a condition-based maintenance strategy; by monitoring parameters such as pressure, temperature, and vibration, operators can detect operational deviations early and implement targeted maintenance, reducing the need for frequent, routine overhauls.

Efficiency and Cost-Effectiveness

For high-volume compressed air users, centrifugal technology offers a superior cost advantage over the entire equipment lifecycle compared to configurations using multiple parallel screw-type air compressors. An aerodynamically optimized multi-stage compression design, combined with inlet guide vane (IGV) regulation, ensures a low specific power consumption across a broad operating range. Furthermore, the oil-free design eliminates the need for oil-air separation systems and reduces costs associated with condensate treatment and the maintenance burden on downstream filters. Over the long term, this translates into lower direct energy expenditures, as well as reduced indirect operating costs stemming from pressure drops and routine maintenance.

The delivery of consistently high-purity compressed air helps protect both end products and production equipment. In industries with stringent air quality requirements, this mitigates the risks of product defects, unscheduled cleaning, and customer complaints. The compact, integrated design simplifies installation and saves valuable floor space. Additionally, this series supports heat recovery solutions, allowing for the capture and reuse of waste heat from the cooling system—further optimizing the total cost of ownership throughout the equipment’s lifecycle.

Brochure Download

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Liutech LUT 355-2000kW Oil-Free Centrifugal Compressors Brochure

About Liutech Company Profile

On April 27, 2002, the Swedish Atlas Copco Group fully acquired Liuzhou Fuda Machinery Co., Ltd., established in 1994. LIUTECH became the first brand acquired by Atlas Copco Group in China, professionally producing and selling LIUTECH-branded stationary and mobile screw air compressors and post-treatment equipment in the Chinese market.

In 2013, the company moved its Customer Center from Liuzhou to China’s economic hub—Shanghai. In 2017, the group further integrated and specialized its resources, deciding to register an independent legal entity, Liuzhou Tech Machinery Equipment Co.,Ltd., to professionally manage the sales and service of LIUTECH stationary machines. Since then, Liuzhou Fuda Machinery Equipment Co., Ltd. has focused on all LIUTECH mobile machine business, while LIUTECH stationary machine sales and services are handled by Liuzhou Tech Machinery Equipment Co., Ltd. and its subsidiaries.

In 2024, on the 30th anniversary of the brand, LIUTECH (Shanghai) Compressed Air Systems Co., Ltd. officially began operations. LIUTECH has always upheld the brand promise, “We Focus on Your Compressed Air,” continuously developing and providing customers with energy-efficient compressed air system solutions. These include the full range of oil-injected screw compressors, water-injected screw compressors, oil-free scroll compressors, oil-free screw compressors, centrifugal compressors, refrigerated dryers, adsorption dryers, air receivers , pipeline filters, Jet Energy pipelines, heat recovery units, and various service products.

The LIUTECH brand adopts advanced European technology, with product designs tailored to the unique needs of the Chinese market, better adapting to local operating conditions. At the same time, nationwide one-stop service ensures peace of mind for our customers.

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