A blower is a machine that creates pressure to move air at required pace.; the device increases the velocity of air that is passed through it. Effectively, a blower is designed to move air and gas at low to high pressure to perform a specific function. They consist of an electric motor where the shaft is driving a number of impellers / fans and a housing. 

Airflow, or air flow, is the movement of air. The primary cause of airflow is the existence of air. Air behaves in a fluid manner, meaning particles naturally flow from areas of higher pressure to those where the pressure is lower. Atmospheric air pressure is directly related to altitude, temperature, and composition. Flow is a measure of air output in terms of volume per unit of time. Typical units to express airflow are: By volume: l/s (litres per second) m3/h (cubic metres per hour) ft3/h (cubic feet per hour) ft3/min (cubic feet per minute, CFM). By mass: kg/s (kilograms per second).

Velocity refers to how fast the air is moving in distance per unit of time. The common units are metres per second, feet per second, etc.

​Pressure is the measure of force applied on an area. The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m2). The common units for pressure are pounds per square inch (PSI), Pascals (Newtons per square metre), etc. Because pressure is commonly measured by its ability to displace a column of liquid in a manometer, pressures are often expressed as a depth of a particular fluid (e.g., millimetres of water/mercury or inches of water / mercury).

There are also some traditional measures such as mm of water or mm of mercury which are defined as the pressure exerted by a column of water (or mercury) of 1 mm height.

How are Flow, Velocity, and Pressure related?

The relationship between flow, velocity, and pressure can be explained using Bernoulli’s principle. Bernoulli’s equation states mathematically that if a fluid is flowing through a tube and the tube diameter decreases, then the velocity of the fluid increases, the pressure decreases, and the mass flow (and therefore volumetric flow) remains constant so long as the air density is constant. This principle holds true for gases so long as the gas is moving far below the speed of sound and does not vary in temperature (as this would cause an increase in volume). 

In some cases, the North American market requires UL or CSA approved solutions. With a few exceptions, we use UL listed materials. Ask Your Sales contact if your products can be UL or CSA approved.  

In general, MAE products are classified as components, a device which is not intended to work standalone, but needs to be incorporated into a system by electrical and mechanical provisions in order to function as intended and safely; as such, they do not require the CE marking.  Ask our sales department for details.