Silica Gel Transformer Breathers

required number of Breathers
  • Description
  • 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.  The R Series Transformer 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.

The low cost Polycarbonate Transformer Breathers are filled with self-indicating silica gel. This desiccant is blue or Orange when active and turns pink or Green 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.

The top pipe connector (3/4″ female pipe thread) is also the filling and emptying plug.  The beaded self-indicating silica gel desiccant should be replaced once the color has changed from blue to pink, or Orange to Greenas indicated on the label attached to the breather.

Maximum torque on threads is 9 N•m (80 in. – lbs.)

Full installation and maintenance instructions are supplied with each Desiccant Breather.

Polycarbonate Transformer Breathers

Desiccant ChargePart NumberMVA RatingMax. Oil Contents
0.60 kgDT-6001.25(1,500 liters)
1.20 kgDT-12003.0(3,000 liters)
1.90 kgDT-19006.0(4,750 liters)
Part NumberOverall DiameterOverall Length (Dimension A)Dimension B
DT-6004.25″ (108 mm)158 mm110 mm
DT-12004.25″ (108 mm)260 mm212 mm
DT-19004.25″ (108 mm)343 mm294 mm
R Transformer Desiccant Breather

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