The Pyropress TX50 series of transformer relief valves have an effective relief area of almost 15 cm2, and are suitable for transformers of up to 3,000 litre oil capacity and the TX135 series have an effective area of 140 cm2 suitable up to 45,000 litres of oil. Both types provide opening pressure ranges between 4 and 12 PSI. These are factory set to customers requirements.

The Nitrile seals fitted to the TX50 series valves are suitable for use with Silicon and Midel transformer oils. For information on other oils please consult our sales office.