The failure or malfunction of many transformers or similar equipment can be directly attributed to the lack of proper control of the level of water vapor entering the equipment.  It is essential, therefore, that a very low level of humidity is maintained in the airspace of the conservator tank to avoid deterioration in the insulating properties of the cooling medium.

Transformer Desiccant Breathers provide an economic and efficient means of controlling the level of moisture entering equipment during the change in volume of the cooling medium and/or airspace caused by temperature gradients.

All Transformer Desiccant Breathers are filled with self-indicating silica gel.  This desiccant is blue when active and turns pink when saturated.  This allows a visible assessment of the condition of the desiccant.  Various sizes and types of packs of this desiccant are available for recharging the desiccant containers.

Transformer Desiccant Breathers provide clear visibility of the desiccant charge through a clear, shatter-proof, UV stabilized polycarbonate cylinder or window, depending upon the size of the unit.  Two-way, low pressure valves are fitted in the base of the breather to ensure that atmospheric air enters the desiccant charge when a negative pressure differential occurs within the equipment being protected.