Back to Glossary
Air Compressor
What is Air Compressor?
Air Compressor: A machine that converts power into compressed air for powering pneumatic tools and controls on construction sites.
Description
An air compressor is a commonly used term in the construction industry. An air compressor is a mechanical device—reciprocating, rotary screw, or centrifugal—that pressurizes air for storage and delivery to pneumatic tools, sandblasters, spray guns, and HVAC control systems. Portable diesel‑powered compressors are ubiquitous on job sites, while stationary electric units serve workshops. Key specifications include CFM (cubic feet per minute), PSI (pounds per square inch), duty cycle, and tank capacity. Regular maintenance—oil changes, filter replacements, and condensate drainage—ensures longevity and safe operation.
FAQs
What types of air compressors are common on job sites?
Portable reciprocating and rotary screw compressors.
How is compressor capacity measured?
By CFM at a specific PSI rating.
Why drain moisture from tanks?
To prevent corrosion and water carryover to tools.
Can compressors run multiple tools?
Yes—provided total CFM demand does not exceed output.
Are oil-free compressors available?
Yes—used where oil contamination is unacceptable (paint spraying).
What safety devices are required?
Pressure relief valves and automatic shut-offs.
Who services compressors?
Mechanics specializing in pneumatic equipment.
Fun Fact
Fun Fact: The first practical air compressor was invented in 1829 to ventilate mines, paving the way for compressed‑air drilling and tunneling technologies.
CSI Code
22 15 00
NAHB Code
1430







