GLOBE CARBON INDUSTRIES has developed the ideal solution for safety valves & to care ofReactors safety by Graphite Rupture Discs. It is placed in the line on the top of Reactor & burst when pressure increases above test pressure. Available from I kg/cmz pressure to 15 kg/cm: & temp. upto -15'C to +600'C Sizes available : 40 NB, 50 NB, 80 NB, 100 NB, 125 NB, 150 NB, 200 NB, etc.