A non-returnable valve: used for isolating the electrical transformer conservator during abnormal flow of oil due to rupture of transformer tank or bursting of transformer bushing or while draining oil from the transformer tank; does not isolate the transformer conservator during normal flow of oil during filtration\filling\refilling. More than 15000 supplied worldwide.
IP 67 compliant
Padlocking arrangement to ensure erroneous use
Successfully operated in more than 125 transformers \ reactors.
Sometime referred to as Pre-stressed non return valve (PNRV)
Technology patented in more than 80 countries
Limits spillage of oil from conservator preventing spread of fire.