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Choosing Between Screw and Piston Air Compressors

Air compressors are among the most important assets at manufacturing facilities, workshops, and industrial plants. They power a wide range of pneumatic tools and equipment, ensuring uninterrupted operations.
If you are in the market to buy a brand new air compressor, you are presented with two major types: screw and piston air compressors. Each type has its set of advantages and disadvantages. You can only make a suitable purchase when armed with the right information.
Confused between screw and piston air compressors? Don’t worry, we are here to help. Read this blog until the end to learn all about it.

What Is An Air Compressor?

Before getting into the distinction between screw and piston compressors, let’s first take a look at what an air compressor is.
It is a mechanical device that converts power into potential energy. This potential energy is stored in compressed air form inside metal or alloy tanks.
The physics behind an air compressor’s functioning is simple. It increases the air pressure by decreasing its volume. This high-pressure air is effective in powering a wide range of pneumatic tools at minimal cost.
Intake, compression, storage, and discharge are crucial aspects of the air compression process. Depending on the type of air compressor, the intake and compression techniques vary.

Significant Advantages: Screw vs Piston Air Compressors

Screw Air Compressors Piston Air Compressors
Perfect for non-stop, uninterrupted operation The right choice for intermittent applications
Ideal for applications demanding pulse-free airflow Lower cost
Better energy efficiency, especially during long operational hours Ease of use and application. Simple design.
Quieter operation Compact size perfect for smaller workspaces.
Longer life. Fewer moving parts. Cost-efficient maintenance 
Dryer air and better air quality. Easy availability of spare parts
Suitable for large industrial applications Suitable for small to medium pneumatic tools
Better air quality with lower moisture carryover Ideal for operations in a dusty environment.

Significant Disadvantages: Screw vs Piston Air Compressors

Screw Air Compressors

Piston Air Compressors

Higher price range

Unsuitable for continuous operations.

Pricey repairs

Pulsating air flow

Unsuitable for intermittent usage

Poor energy efficiency for longer operations

Unsuitable for smaller workshops

Relatively noisier operations

Requires more floor space for installation

Shorter lifespan. More moving parts

Factors To Consider When Choosing Between Screw And Piston Compressors

Cost

Cost is the most important factor to consider when making business decisions. When choosing between screw and piston air compressors, you must mainly consider two costs: initial and operating. One of the primary mistakes businesses make is not considering the latter.
Piston compressors are cheaper to source. However, their upkeep demands more cost and effort. On the other hand, screw air compressors require up to 30% less operational cost. Over 10 to 15 years, which is a very reasonable period for air compressors, lower operating costs add up.

Duty Cycle

The duty cycle directly influences an air compressor’s efficiency. It is the percentage of time a compressor can operate before the mandatory resting period needed to prevent overheating.
The duty cycle is usually calculated over 10 minutes. If an air compressor works for 7 minutes and rests for 3 minutes, it has a 70% duty cycle. A screw compressor, designed for 24×7 operations, does not need to cool down and has 100% duty cycle.

Capacity-CFM

Measured in Cubic Feet Per Minute (CFM), the capacity of air compressors is an important factor to determine while choosing between screw and piston air compressors. Piston air compressors are perfect for low-volume applications. Screw compressors are perfect for consistent air flow.

Maintenance Requirements

Screw air compressors are your best friend if you are looking for a low-maintenance option. A piston air compressor has more moving parts. Meaning, it is more prone to damage and demands more maintenance and care. When the screw compressor does demand repairs, it could be slightly more expensive. However, the lower maintenance costs more than make up for it.

Conclusion

SL Engineering is a one-stop destination for the best air compressors in Perth, WA. Our extensive selection of screw and piston air compressors comes in different sizes. Call (08) 9399 9412 or email info@slengineering.com.au to get a free quote. From sales and service to repairs and renting, we offer all you need for an uninterrupted compressed air solution.