The pressure relief device (PRD) is designed as a safety device to be used on power transformer and similar oil filled electrical equipments, when pressure in tank rises beyond predetermined safe limit , the PRV operates and performs following functions .  

  • Reduces the pressure in the tank by instantaneously opening the port of about 50 mm Dia in case of all T 50 models.
  • Along with above mentioned function T-50 operates a switch which can be used to initiate precautionary electrical system


  1. Liquid in tank :                Transformer Oil
  2. Operating Pressure :      For all T-50 models â€� 0.35 to 0.84 kg/cm2 ( any one value as per demand)
  3. Port opening :                 For all T-50 models â€� about 50mm Dia