Industrial Air Compressors

Oil-Injected Rotary Screw Air Compressors

Choose an oil-injected rotary screw compressor for your workshop or factory air system. Compare tank-mounted units, integrated packages and standalone machines by working pressure, airflow and the equipment you need.

Our products

Find the Series for Your Air Demand

Start with the package and pressure your equipment needs, then compare models within the series.

RG75HPM 55kW VSD screw air compressor front view

RG Series VSD Screw Air Compressors

Power

10-350 HP

Pressure

8 / 10 / 12 bar

Air Flow

0.72-42.3 mยณ/min

Drive Type

PM VSD

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JCG20 integrated screw air compressor with dryer and tank three-quarter view

Rotary Screw Air Compressor with Dryer and Tank

Power

20-50 HP

Pressure

16 bar

Air Flow

1.62โ€“3.99 mยณ/min

Drive Type

PM VSD

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RUEGO Small Series tank-mounted compact screw air compressor front view

Small Rotary Screw Air Compressor with Tank

Power

3-10 HP

Pressure

8-10 bar

Air Flow

0.27-1.1 m3/min

Drive Type

PM VSD

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RUEGO JYS300HL 220 kW 5 bar low-pressure large-flow two-stage screw air compressor, side three-quarter view

JYS-HL Series Low-Pressure, High-Flow Screw Compressor

Power

50โ€“300 HP (37โ€“220 kW)

Pressure

5 bar

Air Flow

8.2-63.0 mยณ/min

Drive Type

PM VSD

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RUEGO JYS-HA two-stage screw air compressor

JYS-HA Standard and Medium Pressure Two-Stage Screw Compressors

Power

50โ€“675 HP (37โ€“500 kW)

Pressure

8 / 10 / 12.5 bar

Air Flow

5.2-100.0 m3/min

Drive Type

PM VSD

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Series ranges cover multiple models and configurations. Use the modelโ€™s delivered airflow at your working pressure for sizing.

The basics

What Is an Oil-Injected Rotary Screw Air Compressor?

An oil-injected rotary screw air compressor uses two rotating helical rotors to draw in air and compress it as the space between them gets smaller. Oil enters the compression chamber to absorb heat, lubricate and seal. The air then passes through an oil separator, and the recovered oil is cooled and recirculated.

You will also see these machines described as oil-lubricated or oil-flooded rotary screw compressors. These names refer to the same compression method here. Dryers and filters prepare the discharged air for the process it supplies.

Explore All Rotary Screw Air Compressors โ†’

Selection guide

Choose the Right Configuration

Start with the airflow your equipment needs at its working pressure, including losses through treatment equipment and piping. Then consider three separate choices.

01

Installation & Package

A standalone compressor lets you use existing storage and air treatment. A tank-mounted unit combines compression and storage, while an integrated package also brings in drying and filtration. Check the equipment included, electrical supply, ventilation and service space.

02

Drive & Air Demand

Fixed-speed operation suits a steady air load. Variable speed drive adjusts output as demand changes through a shift. Compare power consumption across your working pattern, including quieter periods and daily running hours.

03

Compression Stages

Single-stage and two-stage describe how air is compressed. Compare delivered airflow and power consumption at the pressure and loads you need. Long operating hours make this comparison especially useful when weighing the purchase price against running costs.

Explore Two-Stage Screw Compressors โ†’

Application & air quality

Match the Air Supply to the Work

CNC, packaging & general manufacturing

Size for machines running together and check pressure at the furthest point of use. Match drying and filtration to equipment requirements.

Small workshops & pneumatic tools

Check tool airflow and simultaneous use. A tank-mounted layout saves separate receiver space; allow room for cooling and maintenance.

Local production cells & metalworking

An integrated package reduces separate equipment and pipe connections. Match the working pressure and air quality to the production equipment.

Textiles, conveying & high-volume blowing

Check the process pressure and sustained airflow. For low-pressure service, size piping and treatment equipment to limit pressure loss.

Explore Industrial Applications โ†’

Build the Air Treatment Around the Process

Specify moisture, particle and oil limits at the point of use. An oil separator inside the compressor is one part of the system; the dryer and filters handle the required downstream treatment.

Moisture. Use refrigerated drying for general industrial service, or desiccant drying when a lower pressure dew point is required.

Particles and oil aerosols. Select compressed air filters for the specified contaminant limits. Include oil-vapor treatment when the process requires it.

Storage and drainage. Size the air receiver for demand changes and drain condensate from collection points. Include treatment and piping pressure losses in the system design.

Selection support

Get Help Selecting Your Compressor

Tell us what you need to run. Weโ€™ll help narrow down the series, model and air-treatment package.

Get Selection Support

โ€ข Application, working pressure and airflow

โ€ข Running hours and changes in demand

โ€ข Voltage, phase, frequency and available space

โ€ข Air-quality requirements and existing treatment equipment

โ€ข Destination country and required quantity

No airflow measurement yet? Send your equipment list and working schedule to start the discussion.

OEM / Project Configuration

Need your own branding or a project-specific package? Share your logo, color, electrical supply, nameplate and packaging requirements. Weโ€™ll review them alongside the compressor, receiver and air-treatment configuration.

FAQs

Oil-Injected Screw Compressor FAQs

What maintenance does an oil-injected screw compressor need?

Routine service covers the lubricant, inlet and oil filters, oil separator, coolers and condensate drains. Follow the modelโ€™s service schedule and check operating temperature, pressure and oil level. Keep cooling surfaces clean and leave access for routine servicing.

How does an oil-injected compressor differ from an oil-free compressor?

An oil-injected compressor introduces oil into the compression chamber; an oil-free compressor does not. Start with the oil limit specified for your process, then select the compressor and treatment system together. Both types still need moisture and particle control.

Does an oil-injected screw compressor include a dryer and air tank?

Check the package contents. A tank-mounted compressor includes a receiver, while an integrated package can also include a dryer and filters. Standalone units use separately selected equipment. Match the treatment system to the moisture, particle and oil limits your process requires.

Can I use an oil-injected compressor with my existing dryer and receiver?

Compare the new compressorโ€™s airflow and operating pressure with the ratings of the existing equipment. Check dryer capacity at the expected inlet temperature, filter capacity, receiver pressure rating and connection sizes. Include pressure losses when sizing the system.

How do I choose the right compressor size?

Start with the pressure needed at your equipment and the airflow required when machines run together. Allow for pressure loss through treatment equipment and piping, then compare model output at that pressure. Send an equipment list and working schedule if you do not have measured air-demand data.

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Sending your inquiryโ€ฆ

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Request a Quote

Tell us which products you need and your requirements. Our team will help with selection and prepare a quotation.

Include the product or model, quantity, application and any specifications you know.

Get Screw Compressor Selection Support

Share what you know. If youโ€™re unsure about pressure or airflow, tell us what equipment you use and weโ€™ll help with selection.

Only name and email are required.

Add Technical Details (optional)

Sending your inquiryโ€ฆ

Thank you. Your request has been sent. RUEGO will follow up by email to help with compressor selection.