Air Breathers are monitoring envelopes that contain salts of silica gel (silicon oxide) with colored indicator. The air sucked inside the transformer conservator types get through these container, due to the thermal contraction of the oil mass. Silica gel absorbs the moisture and prevents oil contamination. The color changing are shown on the breather colour label, At this point, the silica gel contained in the Dehydrating Breather must be replaced with new silica gel.
- DIN 42567 Type A : Side flange
- DIN 42567 Type B : Straight flange
- DIN 42567 Type C : Straight Thread
