General Information
This kind of Pressure Relief Valve (PRV) is a safety element of the transformer employs to prevent heavy damages of the tank in the case of sudden rise of the internal pressure. These Valve have been studied in order to remove the excess pressure in a very short time as soon as the pressure in the tank rises above predetermined safe limit the valve operates and allow the pressure to drop instantaneously, it avoids damage to transformer body.
Operating
The PRV's port is sealed with viton 'O' ring and sealing cap, kept sealed by stainless steel rod & stainless steel spring. The sealing cap is exposed to tank pressure, whenever same pressure rises due to any reason, the same pressure acts on the sealing cap from inside. When pressure rises above predetermined safe limit, the sealing cap gets lifted from its seat. This lifting is instantaneous and allows vapours, gases or liquid to come out of tank. The sealing cap regains its position as soon as pressure in the tank drop below the set limit. |
