Pressure relief device

This is a safety valve to prevent the tank and belongings of transformer in power stations or substations from being damaged by detecting abnormal pressure in the tank and discharging the nitrogen gas or oil used for insulation in the upper part of the tank to the air in a short time. This relief valve has electrical contact and operation indicator.

Catalogue (PDF)


Pressure of operating 54±5 kPa 74±5 kPa
Depth 185mm 160mm
Outside diameter ø262
Hole diameter for setting ø235
Weight Approx.10kg