Why we have to stop trashing air compressor modulation

A comprehensive review of air compressor modulation with a comparison of VSD vs. modulation compressors.

Over the past few years, it has become fashionable in compressed air circles to trash modulation. After all, manufacturers had a shiny new object to sell that boosted prices and profit margins and even earned rebates, softening the price increase for many customers. And the government or the utilities, not the customer, sometimes paid the extra fee. How cool is that?

Kaishan, however, believes modulation still has value in some circumstances, especially where new technologies like variable-speed / variable-frequency drives have limitations. In fact, modulation is our standard offering on our KRSD direct-drive rotary screw air compressor and all our premium products, such as our KRSP, and KRSP2 two-stage rotary screw air compressors.

So, we believe it’s worth taking a closer look at the real-world impact of modulation. We’ll start with the background on the basic control cycle that most compressors use, called loading and unloading.

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About Kaishan USA

Kaishan USA engineers the highest quality rotary screw air compressors that enable us to build a better, more efficient future. We streamline our operations by taking direct ownership of 85% of our product content. This process enables us to vigorously control the cost and caliber of our equipment while improving its energy efficiency and safe use. Our solutions range from 5-600 horsepower and are used in a variety of industries. Based in Loxley, Alabama, our new 65,000-square-foot, state-of-the-art manufacturing facility fully stocks over 300 finished units and aftermarket parts that serve customers around the world. We are a proud American manufacturer, with military veterans comprising more than 20% of our staff.

To learn more, please visit www.kaishanusa.com.