SVI Carbon manufacture impervious graphite Rupture Discs (Bursting Discs)of sizes varying from one inch up to ten inches who have exhibited reliable performance. If required, Rupture Discs are provided with vacuum support grill. Material of construction of Rupture Discs can be Phenolic Resin impregnated graphite or PTFE impregnated graphite.
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in section "Heat exchanger, cooling towers, water condensers and radiators"