75kW Standalone Low Pressure Fixed Speed Air Compressor

Elily’s 75kW Standalone Low-Pressure Fixed-Speed Rotary Screw Air Compressor is engineered for low-pressure, high-flow applications at 0.3–0.6 MPa (3–6 bar). Featuring direct-drive fixed-speed construction and robust build quality, it is an economical solution for new low-pressure air systems and factory energy-saving retrofits.

I. Low-Pressure Specialized Design, Fundamental Energy Conservation

Instead of the wasteful solution of high-pressure compressors matched with pressure reducing valves, the airend rotor profile, clearances and piping are optimized for low-pressure operation. It directly outputs 3–6 bar compressed air and removes throttling energy loss, cutting power consumption by 20%–30%. Working pressure is adjustable between 0.3–0.6 MPa to precisely fit production processes.

II. 75kW Direct-Drive System for Stable Continuous Operation

Powered by a 380V/50Hz industrial asynchronous motor with flexible direct-drive connection, the unit achieves full transmission efficiency without belt energy loss. Free of vulnerable VFD components, the simplified circuit withstands dust, high and low temperatures, supporting reliable 24-hour full-load operation with minimal breakdown risk.

Designed with large low-speed rotors, it runs smoothly with low vibration, and the noise level stays below 75 dB.

III. Large Airflow for High-Demand Working Conditions

It delivers 15–18 m³/min free air delivery at 0.3–0.5 MPa, satisfying continuous high-flow demands for air-jet looms, float glass production, cement conveying and chemical material transportation.

Fitted with an enlarged plate-fin radiator and high-capacity fan, the forced air cooling system keeps discharge temperature below 90°C under full load at 35°C ambient temperature to avoid overheat shutdown.

IV. Flexible Configuration & Low Maintenance

This standalone unit excludes an integrated air receiver. Customers can freely match air tanks, refrigerated dryers and filters as required for flexible system layout.

Compact in size and easy to install, it is equipped with an LED digital monitor displaying real-time pressure, temperature and runtime. Standardized interchangeable spare parts simplify maintenance; only regular replacement of oil, air filters and oil separators is needed to lower long-term operating expenditure.

Product parameters:

Applications:

Elily’s 75kW Standalone Low-Pressure Fixed-Speed Rotary Screw Air Compressor serves continuous low-pressure air supply for textile printing & dyeing, glass production, cement building materials, chemical industry, ceramics, dust removal and air purging.

It works as an ideal upgrade to replace outdated piston compressors or high-pressure units running with pressure reducing valves. Featuring competitive upfront cost, steady performance and convenient maintenance, it delivers outstanding overall value.

Company Strength

We have an experienced engineering team dedicated to advanced air compressor R&D to deliver robust technical support. Our product portfolio covers fixed-speed, permanent magnet variable frequency, two-stage PM variable frequency, low-pressure and mobile screw air compressors, blowers and vacuum pumps. All PM variable frequency compressors have obtained China Grade 1 energy efficiency certification.

Our Guangdong production base is located in Liaobu Town, Dongguan, covering over 20,000 m² of standardized workshops. Equipped with advanced manufacturing and testing equipment, we enforce strict production standards. All machines adopt Hanbell airends with Taiwanese technology, Grade 1 energy-efficient PM motors and Zhongchen split inverters. Other key components are sourced from top domestic energy-saving brands.

FAQ：

Q: Can the working pressure of the 75kW Standalone Low-Pressure Fixed-Speed Air Compressor be customized?

A: Yes. Custom pressure ranging from 3–6 bar is available. We preset the target operating pressure at the factory according to your working conditions to avoid on-site adjustment, perfectly matching low-pressure purging and pneumatic conveying equipment.

Q: Does this standalone compressor come with an integrated air receiver tank?

A: No built-in air tank. You can connect it to your existing air tank, precision filters and refrigerated dryers to build a complete low-pressure air system. It is highly flexible for workshop upgrades and equipment replacement projects.

Q: Fixed-speed or variable-frequency compressor, which saves more energy?

A: If air demand stays stable with long continuous full-load operation, the energy efficiency gap is minimal. Variable-frequency compressors deliver obvious energy savings when airflow demand fluctuates sharply. Fixed-speed units stand out with lower upfront cost, simpler structure and easier maintenance.

Q: Is it applicable for dust removal, air purging and material conveying?

A: Highly suitable. Optimized specifically for 3–6 bar low-pressure industrial conditions, it delivers steady constant pressure, ideal for workshop air blowing, environmental dust removal, powder conveying and textile production air supply.

Q: Does the unit generate loud noise? Can it be installed inside workshops?

A: The unit adopts optimized vibration and noise reduction design. Without high-frequency noise generated by inverters, its noise level is 2–3 dB lower than variable-frequency models. It can be placed directly inside production workshops and assembly lines without disrupting daily work.

Q: How to select among 37kW, 55kW and 75kW low-pressure models?

A: Select based on required airflow:

- 37kW: Light-duty low-pressure purging

- 55kW: Centralized air supply or material conveying for medium workshops

- 75kW: Large production lines and high-flow dust removal systems

Consult our team for free professional model selection.

Q: Is maintenance complicated? Are spare parts easy to source?

A: The structure is mature and straightforward. Regular maintenance only requires replacing three filters and dedicated compressor lubricant. Operators can complete maintenance following the operation manual. Motors, controllers and other spare parts are widely available on the market for affordable, hassle-free upkeep.

Q: Does the fixed-speed unit suffer from frequent start-stop cycles?

A: Matched with an air receiver tank and pressure control system, the machine maintains continuous loaded operation under stable air consumption. You can set a broader pressure band such as 0.4–0.6 MPa to minimize start-stop frequency further.