There are many reasons why rotary screw compressors are in such high demand: They are very versatile, reliable, efficeint, quiet and there are many different versions of this popular allrounder. But which one is right for you?
If both a piston and a screw were running the same amount of hours, the screw compressor will be much more efficient and have lower operating costs than the piston over the lifetime of the compressor. When selecting a technology, ask yourself: Is the initial or lifetime cost more important to you and your business?
Unlike piston compressors, in screw air compressors, there are no valves or other mechanical forces that can cause unbalance. This allows a rotary screw compressor to operate at high speeds while combining a large flow rate with small exterior dimensions. The ideal applications of rotary air compressors are continuous, workplace and industrial applications.
- Energy efficiency
- Low noise output
- Small footprint
- Continuous operation at temperatures of up to 46°C
- Low oil carry-over (as little as 3 ppm) in oil-lubricated machines
- Zero loss of capacity over time
- Life expectancy between 60,000 - 80,000 hours
- Reliability
- No duty cycle
- Reduced maintenance needed: There are more moving parts in a piston compressor than in a screw, which results in increased machine wear and tear. Screw compressors don’t have as much wear; hence, they have reduced maintenance needs. But keep in mind that it’s important to keep any type of compressor on a consistent maintenance schedule! This will help ensure machine efficiency and optimal system performance. Back to top
Looking for a rotary screw compressor?
There are two primary versions, oil-free and oil-injected, with options of fixed speed or variable speed drive operation. Ranging from 2kW up to 900 kW, so there is a screw compressor to suit your operational requirements. Back to top
What is a screw compressor?
A rotary screw compressor is one of the two types of positive displacement gas compressor. It uses two rotors to create the pressured needed to compress air.
How does a screw air compressor work?
The main screw compressor parts are the male and female rotors, which rotate in opposite directions. This draws in air that is compressed as the space between the rotors and their housing decreases.
What is the difference between a fixed speed and variable speed drive compressors?
The basic difference between the two technologies can be found right in the name:
- Fixed speed screw compressors run at continuous fixed speed
- Variable speed drive (VSD) technology turns the motor at the appropriate speed in relation to the amount of air that is required
What are rotary compressors used for?
The benefits of a screw compressor are particularly important for manufacturing, where a stopped compressor will impact production, and sectors where air demand is difficult to predict or control.
Still struggling with which technology is right for you? Our compressed air experts are always available to talk you through the decision!
