A rotary screw compressor uses two interlocking helical rotors to trap and compress air continuously. This positive-displacement design gives smooth, pulse-free flow and is the workhorse of modern industry.
The Compression Cycle
- Air enters through the inlet valve into the rotor cavity.
- As rotors turn, the cavity volume decreases and pressure rises.
- Compressed air discharges continuously, without pulsation.
Oil Circuit and Cooling
- Oil seals the rotor clearance, lubricates and removes compression heat.
- Hot oil is cooled in a heat exchanger and filtered before recirculation.
- Air leaving the unit passes through an oil separator before delivery.
Control Systems
- Load/unload, modulation and variable-speed control match output to demand.
- VSD control gives the best part-load efficiency.
What is the lifespan of a screw air end?
With correct maintenance a screw air end commonly runs 40,000–60,000 hours or more before overhaul.
Talk to an Engineer
Contact Panrui with your flow, pressure and air quality requirements to get a recommendation and factory quote for your project.