A portable screw compressor is a self-contained compressed air system built with advanced screw-type air ends and integrated diesel power, designed to deliver a stable, continuous air supply for worksites without access to grid electricity. Unlike stationary electric units limited to factory environments, this equipment mounts on a wheeled chassis for easy relocation across job sites, making it the standard power source for pneumatic tools and production equipment in remote outdoor locations. It converts mechanical energy from the diesel engine into compressed air energy, supporting a wide range of industrial and construction applications with reliable pressure and flow output.
Portable Screw Compressor Parameters:
| Model | Rated FAD | Rated Pressure | Engine | Air end | Weight |
| S60T | 18m3/min | 18bar | 162KW YUCHAI | Single Stage | 3000KG |
| S85D/T | 24m3/min | 22bar | 162KW YUCHAI | Two Stage | 3560KG |
| S95CD/T | 29m3/min | 24bar | 162KW YUCHAI | Two Stage | 4700KG |
| S100D/T | 31m3/min | 25bar | 162KW YUCHAI | Two Stage | 5600KG |
| S125D | 36m3/min | 30bar | 162KW YUCHAI | Two Stage | 5600KG |
How Does a Portable Screw Compressor Work?
A portable screw compressor operates on a simple but highly efficient principle: two intermeshing helical rotors—a male rotor and a female rotor—spin inside a precision-machined housing. The diesel engine drives the rotors, drawing air into the spaces between the rotor lobes. As the rotors turn, these spaces progressively decrease in volume, compressing the trapped air. When the compressed air reaches the set pressure, it discharges through the outlet port and enters the oil-gas separator to remove oil mist, delivering clean, dry compressed air.
Throughout the compression process, lubricating oil is injected into the compression chamber. This oil serves four critical functions: it lubricates the moving parts, cools the compressed air, seals the clearances between rotors, and reduces noise. The oil-gas separator then effectively separates the oil mist from the compressed air to ensure output air quality.
This continuous compression process is fundamentally different from piston compressors. A screw compressor runs at 100% duty cycle—it can operate continuously at full load for hours or even days without overheating or losing performance. The balanced rotary motion produces minimal vibration, allowing the compressor to operate without a heavy concrete foundation. The result is a mobile unit that delivers consistent, reliable airflow anywhere you can drive it. Mobile screw compressors can be transported easily between job sites, unlike large stationary units that are difficult to move.
Components of YG Small Screw Air Compressor
The YG series portable screw compressor is built around several integrated systems that work together to deliver reliable compressed air in demanding conditions.
- The Screw Air End. This is the “heart” of the compressor. The YG series uses high-precision tooth profile rotors to ensure efficient air compression. The single-stage air end on the S60T model is optimized for 18 bar applications, while the two-stage air ends on the S85D/T through S125D models deliver higher pressure up to 30 bar with improved efficiency.
- Two-stage compression provides better energy efficiency and lower operating temperatures, extending service life.
- The Yuchai Diesel Engine. A 162kW Yuchai diesel engine powers every model in the YG series. The engine provides the torque needed to drive the air end under full load, whether the compressor is running at 18 bar or 30 bar. Diesel power means the portable screw air compressor operates independently without an external power supply—essential for remote job sites without grid electricity.
- The Cooling System. Continuous compression generates heat. The YG series features an efficient cooling system that maintains optimal operating temperatures even during extended shifts. This prevents overheating and ensures consistent performance in hot climates.
- The Oil-Gas Separation System. The separation system removes oil mist from the compressed air, delivering clean air to downstream equipment. Clean air extends the life of pneumatic tools and prevents contamination in sensitive applications.
- The Rugged Chassis. The equipment casing uses high-quality steel with anti-corrosion treatment, designed to withstand severe weather and harsh site conditions. The mobile chassis allows the compressor to be towed or transported easily between job sites.
What a Portable Screw Compressor Powers?
Down-the-Hole (DTH) Drilling. This is the most demanding application for mobile compressors. DTH hammers require continuous, pulse-free compressed air at pressures from 18 to 30 bar. The YG series delivers exactly this—consistent airflow that keeps the hammer firing and the hole advancing. Piston compressors pulse and overheat under these conditions. The screw compressor’s continuous output is essential for drilling efficiency.
Water Well Drilling. Deep water wells require high-pressure air to power the drilling hammer and lift cuttings from the borehole. The S85D/T through S125D models deliver the pressure needed for deep drilling applications, with the S125D reaching 30 bar at 36 m³/min.
Mining Operations. Underground and surface mining both depend on compressed air for drilling, blasting, and ventilation. The portable design allows the compressor to move with the mining operation.
Sandblasting and Surface Preparation. Sandblasting requires large volumes of compressed air at moderate pressure to propel abrasive media. The S60T delivers 18 m³/min at 18 bar—sufficient for most sandblasting operations.
Pipeline Construction. Welding, testing, and pneumatic tool operation on pipeline projects require reliable compressed air along the right-of-way. The mobile compressor moves with the pipeline crew.
Infrastructure Construction. Road building, bridge construction, and tunneling all depend on compressed air for rock drills, jackhammers, and other pneumatic tools.
Pneumatic Conveying. Moving dry bulk materials through pipelines requires large volumes of compressed air at consistent pressure.
4 FAQs About Portable Screw Compressor
A: Most general pneumatic applications use a default pressure of 0.8 MPa, and our units can be adjusted within their rated pressure range to match specific tool requirements.
A: You should add a receiver tank when your operation has very high peak air demand, large fluctuations in air usage, or requires extremely stable output pressure for precision processes.
A: Yes, as long as the compressor’s flow and pressure ratings match the requirements of your specific tools. We help customers match the right model to their equipment list for reliable performance.
A: Yes, diesel-driven units are purpose-built for independent operation in areas without grid electricity, with durable engines designed for long hours of continuous field use.
Portable Screw Air Compressor For Sale
A reliable portable screw compressor is an essential power source for any outdoor construction, mining or manufacturing operation that depends on pneumatic equipment. YG manufactures each unit with high-quality screw air ends and heavy-duty diesel engines, with strict factory testing to ensure stable performance and long service life under demanding working conditions. Our technical team helps every customer select the right model, pressure and flow configuration to match their specific equipment and site requirements.
If you are looking for a durable, high-performance small screw air compressor for your construction, mining or production operation, YG provides a full range of models to fit different workload scales. Contact our team today to share your air pressure, flow and site requirements, and we will recommend the optimal configuration for your project.
