Mark 7 Transformer Breather

The Mark 7 transformer breathers are designed to protect equipment operating under high mechanical stress and made from mild weld steel to withstand bumps, vibrations and shock parameters found in electric traction (e.g. trains) and other similar vehicles.

A cost-effective way of controlling moisture, the Mark 7 transformer breathers are fitted with oil-seals bowls & filled with Envirogel (Orange-Indicating Desiccant). Beaded Envirogel is used instead of the standard granular material to give the Mark 7 a much higher dust attrition resistance. They only require periodic inspection of oil level and replacement of desiccant (when the envirogel turns from orange to green in colour), which involves little effort.

The Mark 7 comes in three different models, with varying body lengths.

 Model No.  Height of Desiccant Container (“L”) (mm)  Overall Height (mm)  Dessicant Weight (Kg)  Equipment Oil Contents (Litres)
 701  127  190  0.75  550
 702  235  300  1.20  880
 703  407  407  2.50  1850

Mark 7 Transformer Breather Product Brochure: Download