Sight Glasses:

Sight Glasses

Sight glasses are usually installed in the liquid line of commercial objects. Sight glass will show bubbles, if the system is low on refrigerant. Sight glass may show multiple bubbles when you first start the system. Or, they can appear only as a system stops. This is normal alignment actions and do not indicate a lack of refrigerant.

Bubbles may also show a restriction in the path before the inspection glass. This may be due partially obstructed land, screen, or filter. Sight glass long extensions that allow brazing or soldering seams without damage to the sight glass. Some sight-glass, built-in suction line or liquid line filter-dehydrator.

Sight glass can be used on a large liquid line. This includes installation of small parallel flow in the pipe. If bubbles in a liquid, some will travel through the sight glass tubes and point to the lack of refrigerant...

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Sight Glasses