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The Theory of Air Compressors

Theory of Air Compressors

Pressure_gauge_psi

What’s the difference between PSI and CFM?

The difference between PSI and CFM is what they measure. PSI measures pressure, while CFM measures volume. PSI and CFM are often used as performance specifications for air compressors and air-powered machinery. Together, they indicate the maximum air volume and pressure produced by an air compressor to power air tools. To better understand the difference […]

Keeping your compressor cool

Keeping Your Cool: Managing Heat Rejection Requirements For Your Air Compressor System

After you’ve determined the size of air compressor you require and the engine needed to power that compressor, the next important step is to ensure the air compressor can operate optimally in your working environment. One important aspect of optimal performance is reducing and removing heat. The compression of air generates heat, and lots of it! […]

Temperature

How Inlet Temperature Affects Your Air Flow

When designing an air compressor or purchasing a pre-designed system for your work, it’s important to consider where your compressor air intake is located because the location has a direct impact on the compressor’s performance. There are three important factors to consider with the inlet location: Particulates in the air (dust which can plug filters) […]

Gas Drive working at Elevation

Why Does My Air Compressor Perform Differently At High Altitudes?

Anyone who has used an air compressor at high altitudes knows how frustrating it can be. At higher altitudes, air compressor performance is degraded, and it can take a lot longer to complete tasks than at lower altitudes. People who move to or work in areas that are at a higher altitude are often surprised […]

Calculating time to fill

How to work out “Time to Fill” type questions using simple logic

If you need to find an estimate for how much time it will take to fill your air tank, you’ve come to the right place. Let’s say you have an air tank, or some other suitably rated pressure vessel, and you want to figure out how long it will take to bring the pressure up […]

Did you know

What are Dual Tower Regenerative Desiccant Air Dryers (and how do they work?)

Heaterless Type (Pressure Swing Dryers) Dual tower desiccant air dryers are used to produce dewpoint temperatures below the freezing point of water, as well as reduce the moisture content of compressed air used in critical process applications. Typical dewpoints produced by these types of dryers are -40° F to -100° F, although lower dewpoints are […]

Calculating time to fill

How To Calculate Vessel Depressurization Time With Quick & Simple Logic

VMAC recently received a message from a process engineer in London who had a great question after reading our How to Work Out ‘Time To Fill’ Type Questions Using Simple Logic article. The process engineer asked: “I was wondering if you have a similar calculation that you could share for “How to Calculate the Depressurization […]

Gas Drive working at Elevation

Gas combustion engines at elevation

Small CFM gas driven air compressors won’t perform as well at 5,000 feet of elevation as they do at sea level. They may fail, bog down, or supply less air power. But why is this? It all comes down to the physics of gas combustion engines.

MOST COMMON COMPRESSED AIR DRYING METHODS

The 6 Most Common Compressed Air Drying Methods

Water is a challenge in every air compressor system. As air is compressed, water is brought into the air stream. During cooling, that water condenses and is mixed with the compressed air that’s delivered to your tool or application. Some water is okay for most applications but too much water can be a problem. That’s […]

impact gun

ACFM vs. SCFM | (Actual Cubic Feet/Min. vs. Standard Cubic Feet/Min.)

The air compressor industry loves to use acronyms, especially when measuring airflow and air consumption. Two common acronyms that represent measurements are ACFM and SCFM. But before we jump into those, we need to first understand a more basic acronym: CFM. CFM, or Cubic Feet per Minute, is a general measurement for the amount of […]