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Rotary Screw Air Compressor (Direct Drive Screw Compressor)

The direct drive coupler is a unique asset on this rotary screw air compressor, as opposed to the belt drive that is installed on most Woyo screw compressors. A major benefit of a direct drive versus a belt drive includes the fact there are fewer parts, costs less and has a simpler design.

The HSD series rotary screw air compressor is specially constructed for industrial purposes with a speed rate of 3,000RPM. With a GHH patented oiled screw as the rotor, the oil injected screw compressor runs quietly and smoothly. It can withstand continuous use, due to the great lubrication. The excellent durability rate will also save consumers operation costs in the long run.

Each HSD series direct drive screw compressors have been built to strict standards in regards to design, production and tests. We also provide quality after-sales services for each air compressor we sell. No matter what model customers choose, a high quality is guaranteed.

1. A patented inlet valve coupled with a PLC system allows the compressor to control the air supply amount to the changing demands of your industrial processes. The unit automatically shuts off when no air has entered the valve within a 20 minute period, saving electricity.
2. A convenient direct drive enables a nearly 100% motion transmission efficiency, which reduces energy loss during transmissions, which leads to saving operating costs.
3. Large rotors are sufficiently supported by large bearings. A good lubrication ensures a smooth rotation, creating less noise than a traditional oil-free unit.
4. Less wear on the parts prolongs the service life.

Technical Specifications

Model No. Operating Pressure
Volumetric Flow Rate
Motor Power
Noise dB(A) Dimensions (mm) Weight (kg) /Outlet Pipe Diameter G Dimensions (mm)
HSD55 7/8/10 10.3/9.8/8.3 55/75 72 1800×1230×1450 1300/1-1/2" 2200×1230×1450
HSD75 7/8/10 13.6/12.6/11.6 75/100 75 2000×1450×1450 1900/2" 2400×1450×1450
HSD90 7/8/10 16.8/16.4/13.9 90/120 76 2000×1450×1450 2000/2" 2400×1450×1450
HSD110 7/8/10 20.8/20.6/17 110/150 76 2400×1500×1670 2400/2-1/2" 2800×1500×1670
HSD132 7/8/10 24.2/23/20.3 132/180 76 2400×1500×1670 2500/2-1/2" 2800×1500×1670
HSD160 7/8/10 29/28/25 160/215 78 3150×1720×1930 4200/2-1/2" 3550×1720×1930
HSD250 7/8/10 45/42.5/40 250/340 78 3450×1980×2150 5500/DN80 3850×1980×2150

**Note: The above models are for reference only. Customized options are available.


Remote control/On-site control
RS-485 communication, supporting MODBUSRTU protocol
Linkage mechanism/Computer-based centralized control
Oil filter (time set-point entry)
Air filter (time set-point entry)
Oil and air separator (time set-point entry)
Lubricating oil(time set-point entry)
Lubricating grease (time set-point entry)
Belt (time set-point entry)
Motor protection (overload, phase loss, imbalance, over-voltage, under-voltage)
Blower overload protection
Low temperature protection
Discharged air over-temperature protection
Screw reverse rotation protection
Air supply over-pressure protection
Sensor failure protection

VI. Display, Alarm, Interlock (power failure protection)

Items Display Alarm Interlock Note
Oil filter (time set-point entry) √HA

Air filter (time set-point entry) √HA

Oil and air separator (time set-point entry) √HA

Phase order protection
Discharge end temperature √HA
Discharge end pressure

Thermocouple failure
Startup Timeout
Fan failure

Main unit failure
Air supply temperature

Alarm Record

Operating Time

Integrated Control

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