Five Critical Differences Between a Single-Stage and ...

Reliable, energy-efficient air is needed for applications like medical device manufacturing.

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Single- and two-stage air compressors have been around for a long time. However, other than the fact that a two-stage air compressor costs more, many end-users are not fully aware of the differences. Especially the ones that determine whether a two-stage model is a worthwhile investment.

Not surprisingly, a single-stage compressor uses one compression chamber to compress air to the desired pressure, while a two-stage air compressor uses two. The two look very similar.

So why would anyone pay more for the two-stage unit? We outline five critical reasons why below.

1. Single-Stage Rotary Screw Air Compressor

A single-stage rotary screw compressor is a type of air compressor that uses one rotating helical screw element to compress air. The screw element is driven by an electric motor.

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In some respects, the single-stage rotary screw compressor may be considered as a positive displacement motor as it delivers a fixed volume per revolution. This fixed volume for each rotor is called swept volume (compressed volume). It is the volume, which will be occupied by the gas when the rotor returns to step 1 position.

Single-stage rotary screw compressors are commonly used in a range of applications, including home and business AC.

2. Two-Stage Rotary Screw Air Compressor

The Two-Stage Compressor is an efficient way to provide compressed air for your tools whenever you need it.

A dual-stage rotary screw compressor is a type of air compressor that uses two rotating helical screw elements to compress air. The screws are typically driven by two electric motors, one for each stage.

The two-stage air compressor is capable of providing a greater volume of compressed air at various pressures, which are desired for most pneumatic applications. In addition, unlike single-stage units, there is no significant pressure fluctuation in their output. The two-stage air compressors best suit a larger air compressor for better performance.

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