TCS900004, Rev.4
07/12/2016
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www.TCSmeters.com
Page 44
Page 44
Air Eliminator Trouble Shooting
PROBLEM: Product is flowing from the Air Eliminators vents
A)
Foreign matter located in between seal plate O
-
Rings and metal reeds.
B)
The seal plate oring may be worn through service life.
C)
The seal plate oring may be cut or dislodged and requires replacement.
D)
The float may have been punctured, containing liquid, not allowing the float to rise and seal the air vents.
E)
The float may have been ruptured from a surge of pressure within the system.
F)
The metal reeds may be fatigued and requires replacement.
G)
The metal reeds may be out of alignment with the seal plate.
PROBLEM: The meter is still registering air within the system
A)
The air return line is not the required minimum of 1/2” ID.
B)
The metering system has insufficient means of eliminating air to the atmosphere. For example, an incorrectly
installed “Catch Can” reservoir is located lower than the air eliminator itself, the reservoir is allowed to become full
or the vent is improperly sized.
There can be numerous reasons why the meter may still register air. First look at the system configuration and see where air is
being introduced into the system. Then determine if the meter is registering “free air” or “entrained air”. Free Air is much
easier to remove from the metering system and may require the use of a Spring Loaded Back Check Valve and/or a Differential
Air Check Valve and/or a High Volume Strainer to help the air eliminator operate more effectively.
Entrained Air is much more difficult to remove. Typically the best way to eliminate Entrained Air will be to remove the source
of entry of air into the system. Some typical examples would be a cavitating pump or a leaking pump or faulty valve seals. A
High Volume Strainer may help accumulate the liquid long enough to disperse the Entrained Air from the system. See Air
Elimination in the Service Manual for more information.
