Pressure relief device valves are used for the purpose of evacuating the high pressure formed inside the hermetic oil type transformers from inside the transformer tank. After evacuating the excessive pressure in the transformer, the valve is completely closed and thus the pressure in the transformer boiler is kept constant and the boiler is not damaged by sudden pressure increases.

• According to the customer’s request, the valves are set to the bar range (0.20 bar to 0.70) during the production phase.
• The connection sizes of our Pressure Valves have three different sizes as G1”, G1 ½” and G2”.
• Relevant pressure relief device valves are mounted on the transformer boiler cover with a sleeve suitable for the connection type