Liquid Line Moisture Indicator

The indicator are designed for installation on commercial refrigerating systems and on civil and industrial conditioning plants.

Sight glasses and moisture liquid indicators ensure a fast and safe inspection of the conditions of the refrigerant fluid in the circuit concerning regular flow and moisture. Liquid indicators also ensure inspection of the regular return of oil to the compressor crankcase.

The moisture/liquid indicators consist of a sensitive element as a ring, which changes color passing from blue to pink according to the percentage of moisture in the system. When the sensitive element from blue fade to pink, working conditions of the system could become difficult. When the sensitive element becomes "pink", it's time to substitute the dehydrator filter.

If the charge and working condition are normal, the refrigerant fluid appears perfectly liquid underneath the "lens" of the indicator. The presence of bubbles indicates that the refrigerant fluid is partial evaporating along the liquid line.

At the start-up the color of the sensitive element may be pink, due to exposure to air humidity and to moisture in the circuit. When the moisture of the refrigerant is brought back to acceptable levels with the dehydrator, the indicator color is once again green. This is evidence that equilibrium has been restablished. In case of persisting pink, measures have to be taken to eliminate moisture. only when the sensitive element comes back to blue, there is evidence that adopted measures were effective. about 12 hours of system operation are required to achieve equilibrium. However, the moisture

Indication is given normally when the plant is in function and the fluid is flowing.

The brazing of indicators with solder connections should be carried out with care, using a low melting point filler material. In any case, avoid direct contact between the torch flame and the indicator body or glass, wich could be damaged and compromise the proper functioning of the indicator.