Mark 7 Transformer Breather

The Mark 7 Transformer Breather is designed to protect equipment operating under high mechanical stress. It is made from mild weld steel to withstand bumps, vibrations, and shock parameters found in electric traction (e.g., trains) and similar vehicles. A cost-effective way of controlling moisture, the Mark 7 Transformer Breather is fitted with oil-seal bowls & filled with Envirogel (Orange-Indicating Silica Gel). 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 desiccant replacement when the silica gel turns orange to green, 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) Desiccant 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