Idex Liquid Controls A8180 Series Installation-Parts page 7

Orientation and Components
Liquid Controls mechanical air and vapor eliminators are
typically bolted, in an upright position, onto the top of a
strainer on the inlet side of the meter. Before operation, air
and vapor eliminators must be piped to a storage tank and–on
most meter systems– to an air-check (or differential) valve.
Installation and maintenance must be done by a qualified
technician. See Installation
Air and Vapor Elimination
Liquid Controls mechanical air and vapor eliminators
eliminate air (or vapor) instantly and continuously as it enters
the meter system. Because air and vapor are lighter and less
dense than liquid, they are naturally pushed up above the
product flow. Air and vapor eliminators are set above the
product flow so that air in the system is pushed up into the
the cavity inside the air eliminator housing, out the valve plate
vent ports, through the piping, and into a storage tank (see
"Vent Ports Open" figure).
As air is evacuated from the system, the liquid level inside the
air eliminator cavity is allowed to rise and push the float up.
As the float moves up, it presses the reed strips against the
valve plate sealing the vent ports and preventing product from
passing through the piping and into the storage tank. If more
air enters the system, it will rise to the top of the air eliminator
cavity. The air will accumulate there and push the liquid level,
and the float, lower. As the float falls, the reed strips pull
away from the vent ports, and air can be vented before it
enters the system.
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for Field Piping installation.
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Mechanical Air & Vapor Eliminators
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