Bursting discs Graphilor® 3 bursting discs is a reliable & safe solution to protect pressure vessels / equipments thanks to several technical advantages : • Large corrosion allowance • High temperature range: -50°C to + 220°C and over if a thermal insulation device is • Normalized conception to fit both ISO PN • Long term efficiency: graphite ensures a stable & sharp burst pressure over time • Available sizes from DN25 (1") to 600 (24") • Available on stock for commonly used sizes & pressure calibrations • Burst pressure range from 0.07 to 100 bar g Graphilor® 3 bursting discs application fields : • Chemical process industries • Power plants Protection & safety devices for : • Pressure vessels • Circuit breakers

MERSEN, SPECIALIST IN CORROSION RESISTANT MATERIALS MERSEN GROUP IS RECOGNIZED AS A LEADER IN THE DESIGN AND MANUFACTURE OF CORROSION RESISTANT EQUIPMENT. MERSEN OFFERS : Graphite equipment : heat exchangers, columns… Reactive metals equipment : heat exchangers, reactors, tanks… ARMYLOR® PTFE/PFA-lined equipment : piping, columns, tanks… Experience combined with continous improvement and development of processes and materials allow Mersen to offer a range of GRAPHILOR® 3 bursting discs best suited to your operating conditions. A GRAPHILOR® 3 bursting disc is a safety component intended to protect...

A COMPLETE RANGE OF BURSTING DISCS STANDARDS : of gases from the group I. for purchase orders. Necessary technical data needed is : APPLICATION : Nature of the equipment to be protected, Planned utilization for the disc (primary or secondary relief device, valve protection … etc), Nature of the fluid in contact, Operating conditions which the disc can be subject to: (minimum and maximum) temperature, (normal and maximum) pressure, back-pressure, vacuum… etc. DISC OPERATION : Specified burst pressure (PRS*) at a specified temperature (TS), Minimum relief section (AB) or diameter (DB) of the disc,...

MAIN FEATURES SINGLE-PIECE DISCS DISCS WITH REMOVABLE MEMBRANES GRAPHILOR® 3 OR STAINLESS STEEL (SUPPORT) GRAPHILOR® 3 NOT IMPREGNATED (MEMBRANES) EXPANDED GRAPHITE (MEMBRANE GASKETS) MEDIUM PRESSURE GRAPHILOR® 3 OR STAINLESS STEEL (SUPPORT) GRAPHILOR® 3 IMPREGNATED (MEMBRANES) EXPANDED GRAPHITE (MEMBRANE GASKETS) MATERIALS USED MEDIUM PRESSURE MEDIUM PRESSURE GRAPHILOR® 3 IMPREGNATED (DISC) EXPANDED GRAPHITE (GASKETS) HIGH PRESSURE MEDIUM PRESSURE MEDIUM PRESSURE GRAPHILOR® 3 IMPREGNATED (DISC) EXPANDED GRAPHITE (GASKET) THERMAL INSULATION DEVICE VACUUM NETTING FOR SERIES 4 RUPTURE DETECTOR...

CHOOSING A BURSTING DISC THE FOLLOWING PARAMETERS MUST BE KNOWN WHEN SELECTING A BURSTING DISC : The specified burst pressure (PRS) The specified rupture temperature (TS) The discharge diameter (DB) The operating ratio (KS) The pressure and vacuum conditions The nature of the material in contact with the Bursting disc SINGLE-PIECE DISCS DISCS WITH REMOVABLE MEMBRANES DISCHARGE DIAMETER (DB) mm Inches

THERMAL INSULATION DEVICE HIGH TEMPERATURE USE : TEMPERATURE LIMITS OF FUNCTIONING : MATERIALS : Graphilor® 3 ring and retaining grid Carbon fibers insulating packing Expanded graphite gaskets APPROXIMATE WEIGHT DISCHARGE CROSS SECTION (%) + 350°C in gas phase + 250°C in liquid phase

TRACEABILITY, MARKINGS AND REFERENCES • Mersen serial number • The nominal diameter of the disc or the associated membrane • Mersen serial number • The number of the graphite batch • The specified burst pressure is calibrated at 20°C • The temperature for which the burst pressure is specified Each disc has a reference code. This code is composed of 12 alpanumeric characters, as defined below : 01 = disc / 20 = Serie 21150 = diameter 150 / 1000 = 10 bars of maximum pressure 01 = disc / 40 = Serie 4/ -50 = diameter 50 / --035 = 0.35 bars of maximum pressure

TECHNICAL INFORMATION ASSEMBLY OF BURSTING DISCS : The installation and commissioning manual supplied with each disc summarizes all the installation and utilization instructions. MOST COMMON EXAMPLES OF ASSEMBLY : PROTECTION OF SAFETY VALVE : more than the opening pressure set for the valve. - The safety valve would operate after the bursting of the safety disc. higher than the opening pressure of the valve. - The safety disc operates only when the safety valve fails. PROTECTION AGAINST OVERPRESSURE AND NEGATIVE PRESSURE : - The upper disc insures the protection against over-pressure. - The lower...

BURSTING DISCS IN GRAPHILOR®3 SERIES 1 DISCS WITH REMOVABLE MEMBRANES : Low pressure use Dn 50 to 600 Pn 10-16 DISCHARGE CROSS SECTION TOTAL THICKNESS GASKET OD/ID (*) The specified burst pressure is calibrated at 20°C 9

BURSTING DISCS IN GRAPHILOR®3 SERIES 2 DISCS WITH REMOVABLE MEMBRANES : Medium pressure use Dn 25 to 600 Pn 10-16-25-40 On request, the upstream support can be equipped with a grid to allow operation under vacuum DISCHARGE CROSS SECTION WITHOUT GRID DISCHARGE CROSS SECTION ANSI SERIE GASKET OD/ID (*) The specified burst pressure is calibrated at 20°C 10

BURSTING DISCS IN GRAPHILOR®3 SERIES 3 SINGLE-PIECE DISCS : Medium pressure use Dn 25 to 600 Pn 10-16-25-40 OPTION : ANTI-STICK COATING Fluoropolymer coating can be proposed on process side or both sides for additional corrosion resistance or for providing non-stick surface. FPE coating DISCHARGE CROSS SECTION GASKET OD/ID ANSI SERIE (*) The specified burst pressure is calibrated at 20°C

BURSTING DISCS IN GRAPHILOR®3 SERIES 4 SINGLE-PIECE DISCS : Medium pressure use Dn 25 to 600 Pn 10-16-25-40 On request, the disc can be equipped with a grid to allow operation under vacuum OPTION : VACCUM BAR SUPPORT A graphite vaccum bar support cemented to the disc replaces the vaccum grid if bursting pressure is between 0,7 bar and 1,4 bar. Graphite bar support DISCHARGE CROSS SECTION ANSI SERIE (*) The specified burst pressure is calibrated at 20°C 12 GASKET OD/ID