Guide to Choosing Air Compressors
Compressors are appliances that make and use compressed air for powering pneumatic tools such as nailers, paint sprayers, staplers and impact wrenches. Technicians and contractors use pneumatic devices for roofing, framing, finishing work, bodywork and automotive repairs. In addition, homeowners use compressors for lighter applications such as inflating sports equipment and tires, as well as for home improvement projects.
There are many kinds of compressors, each built for specific applications. The following guide will help you choose the right air compressor for your needs.
Use
Do you use the compressor occasionally or constantly throughout the day? Also consider what duty cycle you require. The compressor you chose must exceed or meet that duty cycle for it to work properly.
Storage
If you’re going to store the compressor outside, you’ll need a compressor that has special protection from cold temperatures and water. Ventilation is also important, as most compressors are air-cooled.
Amount of flow
The amount of air created by a compressor is measured in cfm (cubic feet per minute). However, the vital measure is actual cubic feet per minute (acfm). This is the best measure of the air available for use. When choosing a compressor, determine if the cubic feet per minute reflects the acfm.
Amount of pressure
Pressure powers your tool and is measured in psi (pounds per square inch). What tool do you use that requires the most air? Your compressor needs to provide that much psi. You should also be able to decide if you need a two-stage or single-stage compressor.
Size of air tank
Compressors that have smaller tanks must work harder to meet air demands, so make sure your tank size meets your air demands. You’ll also have to choose if you want a vertical or horizontal tank, and this entirely depends on your personal preference.
Features
Apart from pressure, air flow and tank size, you need to make other decisions when buying a compressor. Whether it’s for your personal use or for your shop, understanding the extra features and benefits they offer will ensure you are buying the right air compressor.
Horsepower
Horsepower is crucial, but it depends on the compressor’s cfm rating. A compressor with a higher horsepower produces more air than that with a lower horsepower. Therefore, compressors that claim to have high horsepower but poor air flow performance usually run hot and have a shorter lifespan.
Electrical requirements
It’s important to determine the voltage you have. Most homes have 110 volts. Make sure you check both your horsepower and voltage to ensure your electrical service powers the machine.
Control systems
There are 3 control systems you can consider: dual control, constant speed control and start/stop control. Dual control allows users to choose between constant speed and start/stop by adjusting the auxiliary valve of the compressor. Constant speed prevents the air compressor from starting and stopping excessively. It’s ideal for compressors that start more than 6 to 8 times per hour. Finally, start/stop control is perfect for applications that do not require constant air.
Other factors to consider
Other important factors to consider include using the right oil, using the right starter and checking the moisture on the compressor. Using the right oil makes the compressor last longer. Moisture can be harmful for a compressor, so consider moisture removal products such as moisture drains and in-line filters.