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Transformer Breathers

Transformer Breathers


With Transformer Breathers, you can rest assured that your transformers will operate well. Transformer malfunction or failure is often due to water vapour entering equipment or condensing on it. These can be avoided by Transformer Breathers that dehumidify and control the humidity level in the air space above the conservator tank.

Stream Peak’s Transformer Breathers are filled with Envirogel – an indicating silica gel desiccant that changes colour from orange to green when it is saturated with moisture. This will give you a visual indication of when the desiccant needs to be changed, ensuring proper protection for your transformer.  It is easy to install, weather resistant, tamper-proof and has an operating temperature range from -50°C to +70°C, with an adsorption capacity of up to 25%.

Protect your transformers from high humidity, water condensation, pressure variations, dielectric loss, mould growth, and outgassing. Speak to our experts for a consultation on the suitable product to solve your problem!

  • High performance plastic or metal construction
  • Simple installation
  • Suitable for 1250 kVA to 750 mVA Transformers
  • Low dusting, beaded Envirogel adsorbent
  • Up to 25% adsoption capacity
  • Definitive colour change saturation indication
  • IP65 rating
  • Operating temperature range -50°C to +70°C
  • Vandal proof
  • Weather resistant


Adaptors enable Transformer Breathers to be connected properly to the transformer.

Desiccant Reactivation Unit

Desiccant Reactivation UnitThe Desiccant Reactivation Unit is specially designed to recover saturated silica gel (Envirogel) for reuse.

Desiccant Refills

Desiccant refillWhen the Envirogel is saturated, it changes colour to green, indicating that a refill or replacement is needed. Get your refills here!

Mark 7

Mark 7Mark 7 Transformer Breathers are designed to be tougher and operate under high mechanical stress. They are meant for smaller transformers, with a maximum oil capacity of 550 to 1850 litres.

R, R1, R2 and R3

R, R1, R2 and R3The ‘R’ series Transformer Breathers are for medium sized transformers, with a maximum oil capacity of 1500 to 4750 litres.

V, W, X, Y & Z Series

V, W, X, Y & Z SeriesThe V, W, X, Y, & Z series of Transformer Breathers are air dryers for large capacity transformer oil tanks, with a maximum oil capacity of 11,350 to 204,550 litres.

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