Both reciprocating and rotary screw air compressors work through positive displacement. This means that they increase the air pressure by reducing the air’s volume. However, the right type of compressor for the job will depend on horsepower and air pressure consumption needs.
When an air compressor’s standard cubic feet per minute (SCFM) volume is determined, it is calculated using the air pressure at sea level, at 36 percent relative humidity and a temperature of 68°F. When any of these three variables change, the rate at which air moves into the cylinder may be affected.
What is the best type of air compressor for a job that requires a high CFM pressure rating? A single stage pump compressor. Two stage pump air compressors are a good choice though for jobs that require a maximum pressure of 200 psi.
There are several factors to consider when investing in an air compressor: most importantly, what the machine will be used for. Buying a compressor that’s too small for the job will waste valuable time, while one that’s too big will waste valuable resources.
It might seem simple, but a good place to start when choosing an air compressor is where you plan to use it. This helps you figure out whether you need a portable compressor (such as for worksites) or a permanently mounted compressor.
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