Fixed Speed Air Compressors

Fixed-speed Air Compressors are like light switches; they are either 100% on or 100% off, and there is no in-between. Due to this, these compressors are built to run and constantly be compressing air when they are running. 

With these compressors running either full throttle or not at all, it makes them the ideal solution for applications that require constant compressed air. The machines achieve a continuous RPM, keeping the engine constant. Meanwhile, an inlet valve will flutter open and close depending on the volume of air needed.

Applications that benefit from Fixed-Speed Air Compressors are consistent. They need the same air in the morning as during the third shift. Fixed Speeds are wonderful when you have a consistent demand; you use the same amount of air when you start the day as when you finish the day.

Fixed Speed Compared to VSD

The difference between Fixed-Speed Compressors and Variable-Speed Drive (VSD) Compressors is the drive speed. While Fixed-Speed operates at a set RPM, Variable Speed maintains a constant air pressure by adjusting to the motor speed to meet the demand. VSD units can run on 100% flow and less to use less energy while still maintaining demand. 

This makes variable-speed drive compressors the long-term, cost-effective solution for any compressed air system with variable demand. The compressors operate between the maximum and minimum range, varying depending on the current air demand. However, these benefits come with a cost—a hefty price tag. 

The entry price can be a deterrent to VSD compressors, giving the fixed-speed compressors the opportunity they deserve to shine. Fixed speeds can fill the void that piston compressors leave without making the jump to Variable Speed and all of that excess technology. Bigger isn’t always better, especially when it is technology that you do not need.

Why Stay With Fixed Speed?

VSDs’ technological advancements can make fixed-speed compressors seem like a step-down, but don’t let the shine blind you. Variable Speeds excel in variable environments with variable demands. They are the best choices for environments with multiple shifts that need different levels of air, but the odds are that they are not like that in your compressed air system.

Traditional applications are going to have less fluctuation in the air with consistent demand. Most systems are on when you need compressed air and off when you don’t, which is the perfect fit for fixed-speed compressors.

Energy efficiency can benefit your compressed air system if it runs long enough to realize the savings; however, if you only use the compressed air for a shift at a time, you won’t be able to take advantage of the savings. The bells and whistles of VSD compressors can overshadow the benefits of fixed-speed air compressors, though they can be just as beneficial to your system. 

Benefits of Fixed Speed Air Compressors

• Lower capital cost 
• Increased parts availability 
• Lower maintenance and repair costs 
• Most efficient in applications with a consistent demand

Selecting the right air compressor can be a daunting process, filled with balancing characteristics, availability of components, and keeping the wallet happy, to name a few of the ducks you need to keep in a row. Different applications require different compressors for the best performance. 

If you are interested in learning more about the different types of air compressors available, click here. If neither fixed speed nor variable speed fits your needs, then you most likely need a different compressed air pump. It is better to realize this before you find yourself with a compressor that wastes your money.