Air tools on a job site need a steady supply, not stop-and-start pressure. A small rotary screw air compressor keeps air flowing through long shifts. It uses a diesel engine, so it works in places without power lines. The compact frame moves easily between sites on a trailer or skid. When buying, check air flow (FAD), working pressure, and engine type first. YG Machinery offers several models, and you can request a quote for the right one.
Specifications of Small Rotary Screw Air Compressor
| Model | Rated FAD | Rated Pressure | Engine | Air End | Weight |
| S60T | 18 m³/min | 18 bar | 162 KW YUCHAI | Single Stage | 3000 KG |
| S85D/T | 24 m³/min | 22 bar | 162 KW YUCHAI | Two Stage | 3560 KG |
| S95CD/T | 29 m³/min | 24 bar | 162 KW YUCHAI | Two Stage | 4700 KG |
| S100D/T | 31 m³/min | 25 bar | 162 KW YUCHAI | Two Stage | 5600 KG |
| S125D | 36 m³/min | 30 bar | 162 KW YUCHAI | Two Stage | 5600 KG |
Free Air Delivery (FAD) shows how much air the machine pushes per minute. Higher FAD means more tools can run at once. Pressure (bar) must match the requirements of the tool being used. Each model uses a reliable YUCHAI diesel engine for fuel-efficient, stable performance. For a rotary screw air compressor for sale, request a quote with your required FAD and pressure. Screw compressor price depends on model, engine, and air end type.
How a Small Screw Compressor Works
A rotary screw air compressor uses two spinning screws inside a housing. Air gets trapped between the screws and squeezed into a smaller space. This raises pressure without the vibration of piston compressors. Here is how the main parts work:
- Air intake: A filter cleans incoming air before it enters the screw chamber. Clean air protects internal parts and keeps oil in good condition.
- Screw compression: Two meshing rotors turn in opposite directions and push air into a shrinking gap. The compression is smooth and constant.
- Oil injection: Oil is sprayed into the compression zone. It seals gaps, cools the air, and lubricates the screws. This lets the unit run at high pressure without overheating.
- Air-oil separation: After compression, a separator tank removes oil from the air. The clean air flows to the outlet while the oil circulates back for reuse.
- Cooling and control: A radiator keeps oil temperature stable. A controller adjusts engine speed based on air demand, saving fuel during lighter loads.Single-stage models compress air once. Two-stage models split the work into two steps with cooling between them. This design runs cooler and uses less energy at high pressure. That is why most high-pressure models use a two-stage air end.
Portable Screw Compressor in Real Job Setups
A portable screw compressor is often paired with powered tools on site. Here is how common setups work:
- Jackhammers and rock drills: The compressor feeds a steady air stream through a hose. The drill uses this air to hammer and rotate. A mid-size unit can run one heavy breaker or two lighter tools at the same time.
- Sandblasting units: Abrasive blasting needs large, steady airflow to push sand through the nozzle. If the compressor cannot keep up, the blast pattern becomes uneven and surface prep fails. A sandblasting compressor for sale from YG Machinery delivers the airflow needed for common nozzle sizes.
- Drilling rigs: On quarry and water-well jobs, the rig connects directly to the compressor outlet. The compressor powers the down-the-hole hammer while the rig controls rotation and feed. Two-stage models are better here because they hold pressure during long drilling runs.
- Pipeline testing: High-pressure air fills pipe sections to check for leaks. A high-pressure compressor handles this work without extra boosters.
Match FAD and pressure to the tool being used. Check the tool manual for the minimum airflow and working pressure it needs. A unit that is too small will lose pressure under load. A unit that is too large wastes fuel.
Small Rotary Screw Air Compressor: Common Questions
What is the difference between a single-stage and two-stage air end?
A single-stage unit compresses air in one step. A two-stage unit compresses air twice with cooling in between. Two-stage models run cooler and use less fuel at high pressure.
Can a small screw compressor run a sandblaster?
Yes, if the FAD and pressure match the nozzle size. A 6 mm nozzle needs about 1.3 to 3.1 m³/min at 6–8 bar. Larger nozzles need more airflow. Check the sandblaster specs before ordering.
How often does the oil need to be changed?
For most diesel screw compressors, change the oil and oil filter every 500 hours. Change the air filter and separator more often in dusty conditions. Regular service keeps airflow stable and extends airend life.
Does the compressor come with a trailer?
Yes. Some models are trailer-mounted and road-ready. They have lights, brakes, and a towing hitch. Other models are skid-mounted for fixed site use.
Why Choose YG Machinery’s Small Rotary Screw Air Compressor?
YG Machinery is a heavy equipment manufacturer based in China. We ship to over 100 countries and support construction, mining, and industrial projects worldwide. Our line includes the Backhoe Loader Machine, Electric Scaffold Lift, and Polyurea Coating Machine alongside our air compressor range. Every unit is tested before shipment. We offer technical support, spare parts supply, and custom configurations. Send your requirements for a quote.【WhatsApp/WeChat/Phone/Skype】+86 13937183602
