EN-FAB deaerators are used to separate and remove entrained air and gas from petroleum and other liquid products, especially in metering applications.
Since elimination of gas and air is essential to metering accuracy, the EN-FAB deaerator is a necessary part of any metering system wherever there is a possibility that air can be introduced or entrained into the system.
EN-FAB, Inc. deaerators are used for the elimination of free air or gas from hydrocarbon liquid flowing under pressure through piping. It is particularly applicable where the liquid flow is being metered.
Basic Operation Principles of the EN-FAB Deaerator
Vp = G(dp - dc) D
where Vp = rising velocity of discrete particle
G = gravity constant
n = absolute viscosity of carrier fluid
dp = density of discrete particle
D = diameter pf discrete particle
dc = density of carrier fluid
Horizontal Versus Vertical
For Deaerators with identical dimensions, a horizontal unit performs more efficiently than the vertical unit. This is achieved because the bubble has a longer horizontal distance to travel and a shorter vertical distance to overcome. This performance is further enhanced by parallel plates to create laminar flow. Slots in scrubber plates, additionally provide an escape route for the bubbles. In a vertical unit, bubbles travel upwards, counter flow to the liquid carrier, where they are expelled through a pneumatic float actuated control valve commonly referred to as an air eliminator valve.
The Deaerators should be installed on a level foundation and as close to the meter as possible. The discharged vapor from the eliminator valve should be piped to a convenient and safe point. A suitable flame arrestor should be installed at the end of the vapor eliminator discharge piping.
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