Type : Over Pressure / Air Out
Set Pressure : 2.5 ~ 50 mm Bar
Size : 2” ~ 12”
Connection : Flange PN, ANSI
Body : Ductile Iron, Stainless Steel
Trims : Stainless Steel
Protection : II 1⁄2 G c IIB T X
Compliance : 94/9/EC, ATEX 95, ISO 16852
BS&B manufactures wide range of Breather Valves to protect Tank & other Equipment. BS&B 942EV series is for Overpressure application.
http://www.bsbsystems.com/Flame_Arrester/Vacuum_Relief_Vents/Model942EV.html