R Series Transformer Breathers

R series transformer breather includes a UV-stabilised and shatterproof carbonate window, allowing users to check the desiccant condition easily.

Ensuring Desiccant Efficiency

The air dryer features a two-way, low-pressure valve in the breather base, ensuring air enters only during a negative pressure differential. The dessicant unit has a ¾” female pipe thread connection at the top for easy filling and emptying of desiccant.

Available in various sizes (R, R1, and R2) to meet different requirements. The R3 Breather consists of two R1 Breathers, fully saturating one breather before the other, giving users more time to replace the silica gel desiccants after both breathers are fully saturated.

  • All-round visual saturation indicator
  • Definitive colour change saturation indication
  • High-performance plastic or metal construction
  • ISO9001/2008 design approved
  • IP65 Rating
  • Low dusting beaded ENVIROGEL adsorbent
  • Operating Temperature Range: –50°C to 70°C
  • Simple installation
  • Suitable for 1250 kVA to 750 mVA Transformers
  • Up to 25% adsorption capacity
  • Vandal-proof
  • Weather-resistant


 Max. Oil Contents

 Weight of Desiccant

 Overall Length (A)

 Overall Diameter (B)


 1500 Litres





 3000 Litres





 4750 Litres




R-Series-Transformer-Breathers-Product-Brochure, Om Mas Thailand: Download