Air Eliminators Air Eliminators

Technical Brochure

Air eliminators are designed to provide separation and elimination of air in metering systems. Installing air eliminators upstream of measurement devices ensures accurate measurement, whilst protecting all downstream system components. An air eliminator is made up of the metal housing, ball and the air vent. The housing has an inlet, where the liquid flows, and an outlet located on top, where air is released. In systems in which the flow of fluids is measured by a meter, the eliminator is usually attached ahead of the meter and on top of the main line. The main purpose of air eliminators is to prevent air from passing through the meter, which would cause inaccurate volume readings. Most piping systems used in the boilers and chillers in residential housing and manufacturing facilities utilize air eliminators. The air eliminator performs the important function of evacuating air from the filter. Since air is generally lighter than liquids, air eliminators are attached above a stilling chamber at the highest part of the main pipe. Flow meters cannot differentiate between fluids and air, so air eliminators are installed ahead of the meters in a pipeline so that air will not be measured. This way the volumetric readings of the meters are more accurate. Excessive wear and unit failure or damage can also be reduced if the liquid flow is free from air.