The pressure relief valve opens when the pressure inside the tank increases over the set operating value, following for example a failure or a short circuit, and by releasing oil reduces the pressure in the tank. By means of the electric contact, if present, and the optical indication the pressure relief valve indicates that a fault has taken place.

If desired, the oil can be directed in a safe area with special pipe design so that the drainage oil does not flow around.

ETI - Pressure Relief Valves Series VS

Precimeasure - Type 1090