Transformer pipe expansion joint Bellows for instrument transformers

steelroundscrew-in

Specially designed bellows that compensate volume. Often used for oil dillatation compensation which occures during transformer exploatation. Usual application at instrument transformers, current transformers, capacitive transformers, etc. All bellows are 100% helium leak tested at leak rate < 1×10-6 mbar·l/s He Std. Produced from stainless steel, bellows have the ability to work on high temperatures, fatigue & pressure resistance calculated in acc. to EJMA & EN14917 standards. Forming process developed to achieve low spring rates combined with high fatigue resistance.