A42Y-160/320 type used in ,working temperature≤200℃, air, nitrogen gas mixture of hydrogen and other media equipments or pipelines
A42Y-160P/320P、A42Y-160R/320R type used in , working temperature≤200℃, corrosive media equipments or pipelines, as over-pressure protection device. Connection flange according to JB/T2769-92 standard