December 11, 2020
This could be an advantage to your production, as you learn more and more about all the details surrounding compressed air. Continue reading through our compressed air guide to learn even more!
In the international unit system, Pa (Pascal) is the accepted basic unit of pressure. As 1 pascal in compressed air is a very small amount of pressure we typically use the unit:
kPa (1 kilopascal = 1000 Pa)
MPa (1 megapascal = 1000 kPa)
The general air pressure on the earth's surface can be specified in different ways, with more or less the same meaning:
1 atm (atmostar) = 1 kp/cm² (kilopond/cm²)
1oo kPa (kilopascal) = 1 bar
Compressed air pressure is typically specified as overpressure; i.e. pressure above normal atmospheric pressure. This is usually implicit but is sometimes clarified with an (e), kPa(e).
A compressor's capacity; i.e. the amount of compressed air that can be supplied per unit of time; specified in:
l/min (liters/min), l/sec (liters/second) or m³/min (cubic meters/minute).
Capacity refers to atmospheric pressure expanded air.
An (N) before the device; e.g. (N) l/sec stands for "normal" and means that the volume specification applies to a specific ambient pressure and a specific temperature. In most practical cases, (N) l/sec is equivalent to l/sec.