Serie STS
The STS Series Belt Drive Rotary Screw Compressor delivers reliable industrial compressed air with a fixed-speed belt drive design optimized for energy efficiency, quiet operation, and extended service life.
- ✓High-efficiency IE3 motor with belt drive transmission for easy maintenance and adjustment.
- ✓Quiet operation with compact design and small installation footprint.
- ✓Low-speed system that extends service life — capable of operating in environments up to 45°C.
- ✓Easy access for service and maintenance — 6-year airend warranty.
- ✓Reliable STS Series Belt Drive Rotary Screw Compressor for continuous industrial operations.
Description
STS Series Belt Drive Rotary Screw Compressor – Reliable Performance for Continuous Industrial Operation
The STS Series by South-Tek Systems is designed to provide a stable and efficient compressed air supply in industrial environments where demand remains constant.
Its fixed-speed configuration with belt drive ensures robust operation, accessible maintenance, and an excellent cost-benefit ratio. The high-efficiency IE3 motor optimizes energy consumption, while its low-speed design contributes to extended system service life.
Thanks to its compact construction and quiet operation, it integrates easily into various production environments, maintaining reliable performance even in conditions up to 45°C.

Applications
General manufacturing.
Metalworking industry.
Industrial workshops.
Production pneumatic systems.
Assembly processes.
Extended shift operations.
Advantages
Optimized energy consumption through IE3 motor.
Extended durability due to low-speed operation.
Reduced maintenance costs.
Easy installation in limited spaces.
Stable performance under demanding environmental conditions.
Excellent balance between investment and performance.

High-Performance Engineering and Components
The STS Series integrates industrial-grade components recognized for their reliability. It incorporates non-proprietary motors from WEG S.A., improving spare parts availability and reducing long-term service costs. Models up to 40 HP operate in tri-voltage configuration, while units rated at 50 HP and above are configured for standard 460V operation. All motors feature Class F insulation for enhanced thermal protection.
The bar-and-plate cooling system improves heat dissipation and reduces contaminant buildup, maintaining operational efficiency. Its microprocessor-based controller includes integrated phase protection, current monitoring, and MODBUS compatibility, and is prepared for Industry 4.0 and IoT integration, enabling remote supervision and enhanced system control.

Energy-Efficient Compressed Air Solution for Industrial Applications
The STS Series Belt Drive Rotary Screw Compressor is engineered to deliver dependable compressed air while maintaining low operating costs throughout its service life. Its fixed-speed configuration makes it an excellent choice for facilities with relatively stable air demand, where continuous and consistent compressor operation is required.
Unlike variable-speed compressors that constantly adjust motor speed, fixed-speed units perform most efficiently when operating under stable load conditions. For manufacturing plants, production lines, packaging facilities, and general industrial operations with predictable compressed air consumption, the STS Series offers an economical and highly reliable solution.
The belt drive transmission also provides additional flexibility. Belt tension can be easily adjusted during scheduled maintenance, helping maintain optimal performance while minimizing wear on critical rotating components. This simple design reduces maintenance complexity and contributes to lower lifecycle costs compared to more complicated drive systems.
Each compressor is manufactured using industrial-grade components selected for long-term durability. The oversized cooling system, premium bearings, and precision-engineered airend work together to provide reliable operation under demanding production schedules, reducing the likelihood of unexpected downtime.
Designed for Easy Maintenance
Routine maintenance is one of the most important factors affecting compressor lifespan, and the STS Series has been designed to simplify every service procedure. Large access panels allow technicians to quickly reach filters, belts, coolers, and lubrication components without removing major assemblies. This significantly reduces maintenance time while lowering labor costs during scheduled service intervals.
The intelligent controller continuously monitors operating parameters, allowing operators to detect abnormal conditions before they develop into costly failures. Preventive maintenance reminders also help ensure that service intervals are completed on time, improving equipment reliability and protecting the compressor investment. Because the compressor utilizes standard industrial components, replacement parts are readily available, reducing maintenance delays and minimizing production interruptions.
Quiet and Compact Design
Industrial facilities often face space limitations, making equipment footprint an important consideration during installation. The STS Series combines a compact cabinet design with low operating noise, allowing installation closer to production areas without creating excessive workplace noise. Its integrated airflow management system efficiently directs cooling air through the machine while maintaining optimal internal temperatures. The compact footprint also simplifies transportation, positioning, and installation, making the compressor suitable for both new industrial facilities and retrofit projects where available floor space may be limited.
Reliable Air Supply for Continuous Production
The STS Series Belt Drive Rotary Screw Compressor is designed to deliver consistent air pressure during continuous operation, supporting pneumatic tools, automation systems, packaging equipment, CNC machinery, material handling systems, and numerous other industrial applications. Its robust airend, efficient cooling package, and premium motor combine to produce dependable airflow while minimizing energy losses. Whether operating in single-shift facilities or demanding multi-shift manufacturing environments, the STS Series provides the dependable compressed air supply required to keep production running efficiently.
Long-Term Value for Industrial Facilities
Investing in an industrial air compressor involves more than the initial purchase price. Long-term operating costs — including energy consumption, maintenance requirements, service availability, and equipment lifespan — have a significant impact on total ownership costs. The STS Series has been developed to maximize long-term value by combining energy-efficient operation with durable construction and simplified maintenance. For companies seeking a reliable fixed-speed rotary screw compressor that balances performance, durability, and operating efficiency, the STS Series Belt Drive Rotary Screw Compressor offers a practical solution for a wide variety of industrial compressed air applications.
Downloads
STS Series Manual
STS Series Catalog















